Fluid Mechanics Objective Type Questions

Fluidsolid both a & b none of the above

NewtonPascal Joulenone of the above

(a)ρ(b) μ(c)ψ (d)Ф

all the above

normal temperature absolute zero standard temperature all the above

adhesive cohesivevisocity surface tension

viscosity surface tension both a & b capillary rise

1. A substance that deforms continuously by applications of smallest shear force is

2. The unit for pressure

3. The symbol for mass density

4. Specific weight of water at 20oC is9810kg/m3 9810N/ m3 9.81kg/m3

5. The minimum temperature limit is called___________ it as a value of -273 oC

6. Force acts to hold two separate bodies together is termed as

7. It is the measure of resistance to shearing motion

kinematic viscosity Dynamic viscosity both A & B none of the above

Compressibility Viscosity Pressurenone the above

surface tension viscosity Capillarity vapour pressure

1 Pascal kilo Pascal 100kpa 1000kpa

760mm of mercury 10.33m of water all the above

0.7x13.6 0.7/1000 none of the above

8. The ratio of dynamic viscosity to mass density is termed as

9. It measures the elasticity in fluid

10. __________ is one of the causes of the upward flow of water in the soil and in plants

11. The unit of pressure one bar is

12. Atmospheric pressure at sea level at 150C is 101.3 kN/m2

13. When the pressure measured above atmospheric pressure it is called

(a) Absolute pressure (b) static pressure (c) vacuum pressure (d) gauge pressure

14. Calculate the density of petrol of specific gravity 0.7700kg/m3

flowing boiling evaporating none of the above

Steady flow Laminar flow Uniform flow Rotational flow

discharge velocity accelaration all the above

Q1=Q2 a1v1 = a2v2 q1/q2 a&b

stream line path line flow net streakline

20 It is a product of mass density and gravitational acceleration mass density specific weight specific volume specific gravity

21When fluid mechanics is applied to fluid at rest is

15. Pressure on liquid is equal to or less than vapour pressure , the liquid starts

16. This is the type of flow in which the velocity at any given time does not change with respective to space

17. The volume of fluid flowing across the section per second is

18. Continuity equation is

19. A grid obtained by drawing a series of stream lines and equipotential line is known as

(a) Fluid statics (b) fluid dynamics (c) both(a)&(b)

(d)none of the above

22. The volume of fluid flowing across the section per second is (a)density (b)velocity accelaration (d)None of the above

23.Newton’s second law(a)F=m/a (b) m=f x a (c)F=m.a (d)none of the above

24.The basic unit for mass is (a)Newton (b)kilogram (c)second (d)none of the above

25.Unit for power (a)Newton (b)Watt (c)Joule (d)none of the above

26.The unit for energy (a)Newton (b)Pascal (c)Joule (d) None of the above

27. One pascal is

28. An ideal fluid is defined as the fluid which

29. Newton’s law of viscosity states that

(a)N/m2

(b) N/mm2

(c)KN/m2 (d) KN/mm2

a. is compressibleb. is incompressiblec. is incompressible and non-viscous (inviscid)d. has negligible surface tension.

a. shear stress is directly proportional to the velocityb. shear stress is directly proportional to velocity gradientc. shear stress is directly proportional to shear straind. shear stress is directly proportional to the viscosity.

30.A Newtonian fluid is defined as the fluid whicha. is incompressible and non-viscousb. obeys Newton’s law of viscosityc. is highly viscousd. is compressible and non-viscous

31..Kinematic viscosity is defined as equal toa. dynamic viscosity x densityb.dynamic velocity/densityc.dynamic viscosity x pressured.pressure x density

32. The expression weight per unit volume is(a)mass density (b) Specific weight (c) Relative density (d) None of the above

33. The symbol for viscosity (a)ρ b) μ (c)ψ (d)Ф

34. Specific weight of mercury is

(d) all the above

(d) None of the above

36.The expression inverse of mass density is(a)mass density

(a)13.6kg/m3

(b) 13600N/ m3

(c) 136kg/m3

35.Specific weight of water at 20oC is(a)9810kg/m3

(b)9N/ m3

(c) 9.81kg/m3

(b)specific gravity (c) specific volume (d) none of the above

37.It is a product of mass density and gravitational acceleration (a)mass density (b)specific weight (c) specific volume (d) specific gravity

38.The ratio of specific weight of liquid to specific weight of water is

(d) all the above

39..Kinematic viscosity is defined as equal toa. dynamic viscosity x densityb.dynamic velocity/pressurec.dynamic viscosity x pressured.None of the above

40. Relative Density of Water is(a)1 (b)9810 (c) 9.81 (d)1000

41. Specific gravity of water is (a)1000 (b)1 (c) 9810 (d) 9.81

42.Relative density of mercury is (a)13.6b)13600(c)1(d)9.8

43. The unit of viscosity in SI unit is

(b) N-s/Kg

(a) specific gravity (b) specific weight (c) specific volume

(a)N-S/m3


44.In CGS system unit of kinematic viscosity is (a)poise (b)stokes (c)mach number (d)all the above

45. Standard atmospheric pressure in terms of mercury is _____________(a)13.6(b) 760mm (c) 10.3mm (d)none of the above

46. The unit of relative density is

(b)pa-s (c)kg/ms (d)None of the above

47. The unit of bulk modulus in SI unit is

(b)pa-s (c)kg/ms (d)all the above

48.The unit of mass density in SI unit is

(b)pa-s

(d)all the above

49.The unit of visocity in SI unit is

(b)pa-s (c)kg/ms (d)all the above

50.In CGS system unit of viscosity is (a)poise (b)stokes (c)mach number

(c) Kgm2/s

(a)N/m2

(a)N/m2

(a)N/m2

(c)kg/m3

(a)N-S/m2

(d)all the above

51. The ratio of volume to mass of the fluid is termed as (a)compressibility (b)specific volume (c)Specific weight (d)none of the above

52. The ratio of mass to volume of the fluid is termed as (a)compressibility (b) Specific volume (c)Specific weight (d) Mass density

53. The compressibility of the fluid is the reciprocal of (a) density(b)viscosity (c) bulk modulus (d)none the above

54. The bulk modulus of the fluid is the reciprocal of (a)compressibility (b)viscosity (c)pressure (d)none the above

55.In capillary rise the angle of contact between mercury and glass tube is


56.It is a product of mass density and volume of the fluid (a)mass (b)specific weight (c) specific volume (d) specific gravity

57. The ratio of density of liquid to density of water isa. specific gravity b.specific weight c. specific volume d. all the above

(a)0o

(b)228 o

(c) 60 o

58.__________ is one of the causes of the upward flow of water in the soil and in plants(a)surface tension (b)viscosity (c)vapour pressure(d) None of the above

59.When the pressure measured above atmospheric pressure it is called a.Absolute pressure b.static pressure c.vacuum pressure d.None of the above 60.In capillary rise the angle of contact between mercury and glass tube is


UNIT II

1. An ideal fluid is defined as the fluid which a. is compressibleb.is incompressiblec.is incompressible and non-viscous (inviscid)d.has negligible surface tension.

2. Newton’s law of viscosity states that a. shear stress is directly proportional to the velocityb. shear stress is directly proportional to velocity gradientc. shear stress is directly proportional to shear straind. shear stress is directly proportional to the viscosity.

3.A Newtonian fluid is defined as the fluid whicha. is incompressible and non-viscousb. obeys Newton’s law of viscosityc. is highly viscousd. is compressible and non-viscous

4. Kinematic viscosity is defined as equal toa. dynamic viscosity x densityb.dynamic velocity/density

(a)0o

(b)128 o

(c) 60 o

c.dynamic viscosity x pressured.pressure x density

5. Dynamic Viscosity has the dimensions as

6.Poise is the unit ofa.mass densityb.kinetic viscosityc.viscosityd.velocity gradient

7. The increase of temperature a.increases the viscosity of a liquidb.decreases the viscosity of a liquidc.decreases the viscosity of a gasd.increases the viscosity of a gasAns : [b]

8. Stoke is the unit of a.surface tensionb.viscosityc.kinetic viscosityd.none of the aboveAns : [c]9.The dividing factor for converting one poise into MKS unit of dynamic viscosity isa.9.81b.98.1c.981d.0.981Ans : [b]10.Surface tension is the ratio ofa.force per unit areab.force per unit lengthc.force per unit volumed.none of the abpveAns : [b]11.The gases are considered incompressible when Mach Number a.is equal to 1.0

a.MLT -2

b.ML-1 T-1

c.ML-1T-2

d.M-1L-1T-1

b.is equal to 0.50c.is more than 0.3d.is less than 0.2

12.Pascal’s law states that at a point is equal in all directionsa.in a liquid at restb.in a fluid at restc.in a laminar flowd.in a turbulent flow Ans : [b]

13.The hydrostatic law states that rate of increase of pressure in a vertical direction is equal to a.density of the fluidb.specific weight of the fluidc.weight of the fluidd.none of the above.

14.Fluid static’s deals with a.visdcous and pressure forces b.viscous and gravity forces c. gravity and pressure forces d.surface tension and gravity forces.

15.Gauge pressure at a point is equal toa.absolute pressure plus atmospheric pressureb.absolute pressure minus atmospheric pressurec.vacuum pressure plus absolute pressured.none of the above.

16.Atmospheric pressure held in terms of water column isa.7.5mb.8.5mc.9.81md.10.30m

17.The necessary condition for the flow to be steady is that a.the velocity does not change from place to place b.the velocity is constant at a point with respect to time c.the velocity changes at a point with respect to time d.none of the above.

18.The necessary condition for the flow to be uniform is that a.the velocity is constant at a point with respect to time b.the velocity is constant in the flow field with respect to space

c.the velocity changes at a point with respect to time d.none of the above. 18. The flow in pipe is laminar ifa.Reynolds number is equal to 2000b.Reynolds number is equal to 4000c.Reynolds number is more than 2500d.None of the above.

19.A stream line is a line a.which is along the path of a particle b.which is always parallel to the main direction of flow c.across which there is no flow d.on which tangent drawn at any point gives the direction of velocity.

20.The range for co efficient of discharge for a venture meter isa.0.6 to 0.7b.0.7 to 0.8c.0.8 to 0.9d.0.95 to 0.99 21. A flow is said to be turbulent when a. the fluid particles moves in a zig zag way b. the Reynold number is low c. the fluid particles move in layers parallel to the boundary (d)none of the above

22. Bernoulli’s equation is derived making assumptions that

23.. The ratio of actual discharge of a jet of water to its theoretical Discharge is known asa. co-efficient of dischargeb. co-efficient of velocityc. co-efficient of contractiond.co-efficient of viscosity

24.Pitot tube is used for measurement of a. Pressureb. Flowc. Velocity at a point

a. the flow is uniform and incompressibleb. the flow is non-viscous, uniform and steadyc. the flow is steady, non-viscous, incompressible and irrotational d. none of the above.

d. Discharge

25.In a steady flow the velocity

26..If the Reynolds number is less than 2000, the flow in a pipe is a.laminar flowb.turbulent flowc.transition flowd.none of the above27. In which of the following measuring devices Bernoulli’s equation is used?VenturimeterOrifice meterpitot tubeAll of the above28. The co-efficient of discharge of an orifice meter is ……. that of a venturimeter equal tomuch smaller thanmuch more thanany of these29. The piezometric head is the summation of a. velocity head and pressure headb. pressure head and elevation headc. velocity head and elevation headd. none of the above

30.venturimeter is used to measurea. average velocityb. velocity at a point c. pressure at a pointd. None of the above

31. The velocity distribution in laminar flow through a circular pipe follow thea. parabolic lawb. Linear lawc. Logarithmic lawd. None of the above

32. Hydraulic gradient line (H.G.L) represents the sum of a. Pressure head and Kinetic head

a. does not change from place to placeb. at a given point does not change with timec. may change its direction but the magnitude remain unchangedd. none of the above.

b. Kinetic and datum headc. Pressure head , kinetic head and datum headd. Pressure head and datum head

33. When the pipes are connected in series the total rate if flowa. is equal to the sum of the rate of flow in each pipeb. is equal to the reciprocal of the sum of the rate of flow in each pipec. is the same as flowing through each piped. none of the above

34. Boundary layer on a flat plate is called laminar boundary layer if a. Reynold Number is less than 2000b. Reynold number is less than 4000

d. None of the above

a. free stream velocityb. 0.9 times the free stream velocity c. 0.99 times the free stream velocityd. None of the above

36. The boundary layer separation takes place if a. pressure gradient is zerob. Pressure gradient is positivec. Pressure gradient is negatived. None of the above 37. Drag is defined as the force exerted by a flowing fluid on a solid bodya. in the direction of flowb. perpendicular to the direction of flowc. in the direction which is at an angle of 45 degree to the direction of flowd. None of the above

38. Lift force is defined as the force exerted by a flowing fluid o a solid bodya. in the direction of flowb. perpendicular to the direction of flowc. at an angle of 45 degree to the direction of flowd. None of the above

39. Manometer is a device used for measuring a. Velocity at a point in fluid

c. Reynold number is less than 5 x 105

35. Boundary layer thickness is the distance from the surface of the solid body in the direction perpendicular to flow, where the velocity of fluid is equal to

b. Pressure at a point in a fluidc. Discharge of fluid d. None of the above

40. Differential manometers are used for measuring a. Velocity at a point in a fluidb. Pressure at a point in a fluidc. Difference of pressure between two points d. None of the above

41. When the fluid is at rest the shear stress is a. Maximumb. Zeroc. Unpredictable d. None of the above

42. The inlet length of a venturimetera. is equal to the outlet lengthb. is more than the outlet lengthc. is less than the outlet lengthd. none of the above

43. Flow if a fluid in a pipe takes place froma. Higher level to lower levelb. Higher pressure to lower pressurec. Higher energy to lower energyd. None of the above

a. Steady flowb. Uniform flowc. Incompressible flowd. Rotational flow

45. If the velocity, in a fluid flow changes with respect to length of direction of flow, it is calleda. Unsteady flowb. Compressible flowc. Irrotational flowd. None of the above 46. If the density of a fluid in constant from point to point in a flow region it is called a. Steady flow

44. If the velocity, in a fluid flow does not changes with respect to length of direction of flow, it is called

b. Incompressible flowc. Uniform flowd. Rotational flow

47. If the density of a fluid in changes from point to point in a flow region it is called a. steady flowb. unsteady flowc. Non- uniform flowd. Compressible flow

a. Steady b. Uniform c. Compressible d. Laminar

49. If the fluid particles moving in a zig zag way, the flow is called a. Unsteadyb. Non- uniformc. Turbulent d. Incompressible

50. Study of fluid at rest is known asa. Kinematics b. Dynamicsc. Staticsd. None of the above

a. Kinetic energyb. Pressure energyc. Kinetic energy per unit weight densityd. None of the above

52. The term p/ ρg is known as a. Kinetic energy / unit weightb. Pressure energyc. Pressure energy per unit weight densityd. None of the above

53. Using Pitot – Tube we can measure in a pipe.a. discharge

48. If the fluid particles move in straight lines and all the lines are parallel to the surface the flow is called

51. The term v2 / 2g is known as

b. average velocityc. velocity at a pointd. pressure at a point

54. venturimeter is used to measurea. dischargeb. average velocityc. velocity at a point d. pressure at a point

55. Orifice- meter is used to measure a. discharge b. average velocityc. velocity at a point d. pressure at a point.

a. 70 cm of oilb. 2 m of oilc. 20 cm of oild. 80 cm of oil. 57. When the pipes are connected in parallel, the total loss of heada. is equal to the sum of the loss of head in each pipeb. is same as in each pipec. is equal to the reciprocal of the sum of loss of head in each piped. none of the above

58. Maximum efficiency of power transmission through pipe is a. 50%b. 66.67%c. 75%d. 100%

59. The boundary layer takes placea. for ideal fluidsb. for pipe flow onlyc. for real fluidsd. for flow over flat plate only

60. Maximum efficiency of power transmission through pipe is a. 50%

56. An oil of specific gravity 0.7 and pressure 0.14 kgf /cm2 will have the height of oil as

b. 25%c. 75%d. None of the above

UNIT III

1.The loss of pressure head for the laminar flow through pipes variesa. as the square of velocityb. directly as the velocityc. as the inverse of the velocityd .none of the above

2. For the laminar flow between two parallel plates

3. The velocity distribution in laminar flow through a circular pipe follow the

4. When the pipes are connected in series the total rate of flow

c. is the same as flowing through each pipe d. none of the above

5. Boundary layer on a flat plate is called laminar boundary layer if a).Reynolds Number is less than 2000

6.Boundary layer thickness is the distance from the surface of the solid body in the direction perpendicular to flow, where the velocity of fluid is equal to

a. the maximum velocity = 2.0 times the average velocityb. the maximum velocity = 1.5 times the average velocityc. the maximum velocity = 1.33 times the average velocityd. none of the above

a. parabolic lawb. Linear lawc. Logarithmic lawd. None of the above

a. is equal to the sum of the rate of flow in each pipe b. is equal to the reciprocal of the sum of the rate of flow in each pipe

b) Reynolds number is less than 4000c) Reynolds number is less than 5 x 105

d) None of the above

a. free stream velocityb. 0.9 times the free stream velocity

7. The boundary layer separation takes place if

8. Drag is defined as the force exerted by a flowing fluid on a solid body

9. Lift force is defined as the force exerted by a flowing fluid o a solid body

10. Hydraulic gradient line (H.GL.) represents the sum of

11. Total energy line (T.E.L.) represents the sum of

(d)Pressure head. kinetic head and. datum head.

12. When the pipes are connected in series. the total rate of flow

(c)the same as flowing through each pipe

13. When the pipes are connected in parallel the total rate of flow

(c)both of a &b

c. 0.99 times the free stream velocityd. None of the above

a. pressure gradient is zerob. Pressure gradient is positivec. Pressure gradient is negatived. None of the above

a. in the direction of flowb. perpendicular to the direction of flowc. in the direction which is at an angle of 45 degree to the direction of flowd. None of the above

a. in the direction of flowb. perpendicular to the direction of flowc. at an angle of 45 degree to the direction of flowd. None of the above

(a) pressure head and kinetic head (b) kinetic head and datum head (c) pressure head. kinetic head and datum head (d)Pressure head and datum head.

(a) pressure head and kinetic head (b) kinetic head and datum head (c) pressure head and datum head

(a) is equal to the sum of the rate of flow in each pipe (b) is equal to the reciprocal of the sum of the rate of flow in each pipe is

(d) None of the above.

(a) is equal to the sum of the rate of flow in each pipe (b) is equal to the reciprocal of the sum of the rate of flow in each pipe is

(d) None of the above.

14. Power. transmitted through pipes, will be maximum when

(d)Head lost due -to friction = 1/3total head at the inlet of the pipe.

15. Euler's number is the ratio of (a)inertia force to pressure force

(d) none of the above.

16 .Geometric similarity between model and prototype means

(b) the similarity of linear dimensions (c) the similarity of motion (d)the similarity of forces.

17. Reynold's number is defined as the

(d) ratio of inertia force to elastic force. . 18. Froude's number is defined as the ratio of

b)inertia force to gravity force

(d) inertia force to pressure force.

19. Models are known undistorted model if

(b)the prototype and model are having same scale ratio


20 . Model analysis of aero planes and projectile moving at supersonic speed based on

(a)Reynolds number (b) Mach number ( c ) froude number

(d) None of the above

(a) Head lost due to friction =1/2total head at inlet of the pipe (b) Head lost due to friction = 1/4 total head at inlet of the pipe (c) Head lost due to friction = total head at the inlet of the pipe

(b) inertia force to elastic force (c) inertia force to gravity force

(a) the similarity of discharge

(a) ratio of inertia force to gravity force (b) ratio of viscous force to gravity force (c) ratio of viscous force to viscous force

a) Inertia force to viscous force.

(c) inertia force to elastic force .

(a) the prototype and model are having different scale ratios

(c) model and prototype are kinematically similar

21.The boundary-layer takes place

(b) for real fluids (c) for pipe flow only (d) for over flat plates only

22. The boundary layer is called turbulent boundary layer if.

(d) None of the above.23. Laminar sub-layer exists in.


(d) none of the above

(b) Xl/2

26. The separation of boundary layer

(b) positive pressure gradient


27. Loss of head at the entrance of the pipe

(a) for ideal fluids

(a) Reynold number is more than 2000 (b) Reynold number is more than 4000 ( c ) Reynold number is more than 5 x 105

(a) Laminar boundary layer region (b) Turbulent boundary layer region (c) Transition zone

24. The thickness of laminar boundary layer at a distance x from the leading edge over a flat plate varies as (a) x4/5 (b)X1/2 (c) Xl/5

25 .The thickness of turbulent boundary layer at a distance x from the leading edge over a flat plate varies as (a) X4/5

(c) Xl/5 (d) X3/5

(a) negative pressure gradient

(c) zero pressure gradient

(a) 0.5 v2/2g(b) v2/2g(c) ( V1-V2)2/2g(d) none of the above

28. Loss of head at the exit of the pipe

29. Loss of head at the sudden expansion of the pipe

none of the above

30. Energy Loss due to friction of the pipe is given by the Darcy formula is


(d) None of the above.32. Laminar sub-layer exists in.

(c) both a &b (d) none of the above.

UNIT-IV

1 Maximum efficiency of power transmission through pipe is

2. The boundary layer takes place

(a) 0.5 v2/3g(b) v2/2g(c) ( V1-V2)2/2g(d) none of the above

0.5 v2/3g 2v2/2g( V1-V2)2/2g

a) 4flv2/d2gb) 2v2/2gc) ( V1-V2)2/gd) none of the above

(a) Reynold number is more than 2000 (b) Reynold number is more than 4000 ( c ) Reynold number is more than 5 x 105

(a) Laminar boundary layer region (b) Transition zone

a. 50%b. 66.67%c. 75%d. 100%

a. for ideal fluids

3. The boundary layer is called turbulent boundary layer in flow over plates if

4. The drag force exerted by a fluid on a body immersed in the fluid is due to

5. A pump is defined as a device which converts

5. A turbine is a device which converts

6. Efficiency of the jet of water having velocity V and striking a series of vertical plates moving with a velocity u is maximum when

7.The net head (H) on the turbine is given by

8.Hydraulic efficiency of a turbine is defined as the ratio

b. for pipe flow onlyc. for real fluidsd. for flow over flat plate only

a. Reynolds number is more than 2000b. Reynolds number is more than 4000c. Reynolds number is more than 5x 105


a. pressure and viscous forceb. pressure and gravity forcesc. Pressure and turbulence forcesd. None of the above

a. Hydraulic energy into mechanical energyb. Mechanical energy into hydraulic energyc. Kinetic energy into mechanical energyd. None of the above.

a. Hydraulic energy into mechanical energyb. Mechanical energy into hydraulic energyc. Kinetic energy into mechanical energyd. Electrical energy into mechanical energy

a. u = 2Vb. u= V/2c. u=3V/ 2d. u= 4V/2

a. H= Gross Head + Head lost due to frictionb. H= Gross Head – Head lost due to frictionc. H = Gross Head + V2/ 2g – Head lost due to frictiond. None of the above

a) Power available at the inlet of turbine to power given by water to the runner

b)Power at the shaft of the turbine to power given by water to the runnerc)Power at the shaft of the turbine to the power at the inlet of turbined)None of the above

9.Mechanical efficiency of a turbine is the ratio of

10. The overall efficiency of a turbine is the ratio of

11.A turbine is called impulse if at he inlet of the turbine

12. Francis turbine is

13. Flow ratio is defined as the ratio of

14. The speed ratio foe Pelton wheel varies from

15.Unit speed is the speed of a turbine when it is working

a. Power at the inlet to the power at the shaft of turbineb. Power at he shaft to the power given to the runnerc. Power at the shaft to power at the inlet of turbined. None of the above

a. Power at the inlet of turbine to the power at the shaftb. Power at the shaft to the power given to the runnerc. Power at the shaft to the power at the inlet of turbined. None of the above

a. total energy is only kinetic energyb. total energy is only pressure energyc. total energy is the sum of kinetic energy and pressure energyd. none of the above

a. an impulse turbineb. a radial flow impulse turbinec. an axial flow turbined. a reaction radial turbine

a. velocity of flow at inlet to the velocity given (2gH) ½

b. Velocity of runner at inlet to the velocity of flow at inletc. Velocity of runner to the velocity given by (2gH) ½


a. 0.45 to 0.50b. 0.6 to 0.7c. 0.3 to 0.4d. 0.8 to 0.9

a. under unit head and develops unit power

16. Unit discharge is the discharge of a turbine when

17. Unit power is the power developed by a turbine whenhead on turbine is unity and discharge is also unityhead = one metre and speed is unityhead on turbine is unityone of the above

18. Main characteristics curves of a turbine means

19.Operating characteristics curves of a turbine means

20. Governing of a turbine means

21.A turbine is a device which convertsa. Electrical energy into mechanical energyb. Mechanical energy into hydraulic energyc. Kinetic energy into mechanical energyd. energy into mechanical energy


b. Under unit head and discharge one m3/ secc. Under unit headd. None of the above

a. The head on turbine is unity and it develops unit power.b. The head on turbine is unity and it moves at unit speedc. The head on the turbine is unityd. None of the above

a. Curves at constant speedb. Curves at constant efficiencyc. Curves at constant headd. None of the above

a. curves drawn at constant headb. Curves at constant speedc. Curves at constant efficiency d. None of the above

a. The head is kept constant under all condition of workingb. The speed is kept constant under all conditionsc. The discharge is kept constant under all constantsd. None of the above

a. u = 2Vb. u= V/2

23.The net head (H) on the turbine is given by

24. Hydraulic efficiency of a turbine is defined as the ratio

25.Mechanical efficiency of a turbine is the ratio of

26. The overall efficiency of a turbine is the ratio of

27.A turbine is called impulse if at he inlet of the turbine

28. Francis turbine is

29. Kaplan Turbine is

c. u=3V/ 2d. u= 4V/2

a. H= Gross Head + Head lost due to frictionb. H= Gross Head – Head lost due to frictionc. H = Gross Head + V2/ 2g – Head lost due to friction d. None of the above Ans.b

a. Power available at the inlet of turbine to power given by water to the runnerb. Power at the shaft of the turbine to power given by water to the runnerc. Power at the shaft of the turbine to the power at the inlet of turbined. None of the above

a. Power at the inlet to the power at the shaft of turbineb. Power at he shaft to the power given to the runnerc. Power at the shaft to power at the inlet of turbined. None of the above

a. Power at the inlet of turbine to the power at the shaftb. Power at the shaft to the power given to the runnerc. Power at the shaft to the power at the inlet of turbined. None of the above

a. total energy is only kinetic energyb. total energy is only pressure energyc. total energy is the sum of kinetic energy and pressure energyd. none of the above

a. an impulse turbineb. a radial flow impulse turbinec. an axial flow turbined. a reaction radial turbine

a. an impulse turbineb. a radial flow impulse turbine c. an axial flow reaction turbine

30.Flow ratio is defined as the ratio of

31.The speed ratio foe Pelton wheel varies from

32.Unit speed is the speed of a turbine when it is working

33. Unit discharge is the discharge of a turbine when

34.Unit power is the power developed by a turbine when

35.Main characteristics curves of a turbine means

36.Operating characteristics curves of a turbine means

d. a radial flow reaction turbine

a. velocity of flow at inlet to the velocity given (2gH) ½

b. Velocity of runner at inlet to the velocity of flow at inletc. Velocity of runner to the velocity given by (2gH) ½


a. 0.45 to 0.50b. 0.6 to 0.7c. 0.3 to 0.4d. 0.8 to 0.9

a. under unit head and develops unit powerb. Under unit head and discharge one m3/ secc. Under unit headd. None of the above

a. The head on turbine is unity and it develops unit power.b. The head on turbine is unity and it moves at unit speedc. The head on the turbine is unityd. None of the above

a. head on turbine is unity and discharge is also unityb. head = one metre and speed is unityc. head on turbine is unityd. none of the above

a. Curves at constant speedb. Curves at constant efficiencyc. Curves at constant headd. None of the above

a. curves drawn at constant headb. Curves at constant speedc. Curves at constant efficiencyd. None of the above

37.Governing of a turbine means

38. The monometer head (Hm) of a centrifugal pump is given by

39. Francis turbine is an impulse turbinea radial flow impulse turbinean axial flow turbinenone of the above

40. Kaplan Turbine is an impulse turbinea radial flow impulse turbine a radial flow reaction turbine None of the above


42. A turbine is a device which converts

43.Flow ratio is defined as the ratio of

Velocity of runner at inlet to the velocity of flow at inlet

None of the above

44.The speed ratio foe Pelton wheel varies from

a. The head is kept constant under all condition of workingb. The speed is kept constant under all conditionsc. The discharge is kept constant under all constantsd. None of the above

a. Pressure head at outlet of pump – pressure head at inletb. Total head at inlet – total head at outletc. Total head at outlet- total head at inletd. None of the above

a. Hydraulic energy into mechanical energyb. Heat energy into hydraulic energyc. Kinetic energy into mechanical energyd. None of the above.

a. Heat energy into mechanical energyb. Mechanical energy into hydraulic energyc. Kinetic energy into mechanical energyd. None of the above

velocity of flow at inlet to the velocity given (2gH) 1/3

Velocity of runner to the velocity given by (2gH) ½

0.05 to 0.500.6 to 0.70.3 to 0.4None of the above

UNIT V1.The discharge through a single acting reciprocating pump is

a.Q= ALN / 60b.Q= 2ALN/ 60c.Q= ALNd.Q= 2ALN

2. Mechanical efficiency of a centrifugal pump is given by

3. To discharge a large quantity of liquid by multistage centrifugal pump the impellers are connected a) in parallelb) in seriesc) in parallel and in seriesd) None of the above

4. Specific speed of a pump is the speed at which a pump runs when

5. The discharge through centrifugal pump is

b) Q= 2ALN/ 60c) Q= ALNd) Q= 2AL

6. Air vessel in a reciprocating pump is used a) To obtain a continuous supply of water at uniform rate b) To increase suction headc) To increase the delivery head d) none of the above

7. The change in moment of fluid due to flow along a curved path results in a) a change in pressure

a. Power at the impeller / S.H.P.b. S.H.P./ Power at he impeller c. Power possessed by water / power at the impellerd. Power possessed water / S.H.P.

a. head developed is unity and discharge is one cubic metreb. head developed is unity and shaft horse power is also unityc. discharge is one cubic metre and shaft horse power is unit.d. None of the above

a) Q= πDBVf1

b) torquec) a change in the total energyd) none of the above

8. Which of the following is an example of free vortex flow?a) a whirlpool in a riverb) Flow of liquid in centrifugal pump casingc) Flow of liquid through a hole provided at the bottom of a containerd) All of the above

9. In case of forced vortex the rise of liquid level at the ends is……. The fall of liquid level at the axis of rotation a.

c.

10. In case of a closed cylindrical vessel sealed at the top and the bottom the volume of air before rotation …… the volume of air after rotation a.c.

11. With respect to a reciprocating pump which of the following statements is incorrect?a) The limiting value of separation pressure head for water is 6.8 m ( absolute)

12. Reciprocating pumps are most suited where a) Constant heads are required on mains despite fluctuation in dischargeb) Operating speeds are much highc) Constant supplies are required regardless of pressure fluctuationsd) None of the above.

13. Which of the following statements is incorrect for a reciprocation pump?a) The reciprocating pump is essentially a low speed machineb) The percentage of power saved by fitting air vessels is more in a double acting than in a single acting pump.c) The reciprocating pumps can handle only low viscosity liquids free from impurities.d) None of the above

14. In a reciprocating pump the air vessels are used for which of the following purposes?a) To get continuous supply of liquid at a uniform rate.b) To save the power required to drive the pumpc) To run the pump at much higher speed without any danger of separationd) All of the above

15. Which of the following types of impeller is used for centrifugal pumps dealing with muds?

b) During suction, the separation may take place at the beginning of suction strokec) During delivery the separation may take place at the end of delivery d) Indicator diagram shows variation of pressure head in the cylinder for one revolution of crank

a) One side shroudedb) Two sides shroudedc) Double sectiond) Open

16. Which of the following statements is correct with reference to an impeller with backward curved vanes?a) It has a falling head discharge characteristicb) It has a rising head discharge characteristicc) It is easier to fabricated) It cannot run at speeds other than the design speed.

17. The delivery valve while starting centrifugal pump is kepta) Fully closedb) Fully openc) Half opend) In any position

18. Which of the following is not a dimensionless parameter?a) Friction factorb) Specific speedc) Thoma’s cavitations parameterd) Pressure co efficient

19. Higher specific speeds (160 to 500) of centrifugal pump indicate that the pump is ofa) Radial flow typeb) Axial flow typec) Mixed flow typed) All of above

20. The machine can rise the fluid pressure upto 1 atm. is calleda) Fanb) Blowerc) Compressor d) Pump

21. The delivery valve while starting centrifugal pump is kept

22. Manometric efficiency of the centrifugal pumpa) The ratio between Manometric head and the head imparted by the impeller to waterb) The ratio between Manometric head and power at the shaftc) The ratio between Manometric head and the power output of the pumpd) None of the above

a) Fully openb) Half openc) In any positiond) None of the above

23. Mechanical efficiency of the centrifugal pump

24. Overall efficiency of the centrifugal pump

25. Overall efficiency of the centrifugal pump

26. Slip of reciprocating pump is a) The difference between theoretical and actual discharge of the pump b) The ratio between theoretical and actual discharge of the pump c) The ratio between actual and theoretical discharge of the pump d) None of the above Ans :a 27. Negative slip of reciprocating pump is a) The difference between actual and theoretical discharge of the pump b) The ratio between theoretical and actual discharge of the pump c) The ratio between actual and theoretical discharge of the pump d) None of the above Ans :a28. Negative slip of reciprocating pump occurs when a) Delivery pipe is short b) Suction pipe is long c) pump is running at high speed d) all of the above Ans :d29. If the water is in contact with one side of the piston the reciprocating pump is called a) Double acting b) Single acting c) Both of a & b d) None of the above Ans: b

30. If the water is in contact with both sides of the piston the reciprocating pump is called a) Double acting b) Double stage c) Both of a & b d) None of the above Ans: a

a) The ratio between Manometric head and the head imparted by the impeller to waterb) The ratio between power at the impeller and power at the shaftc) The ratio between Manometric head and the power output of the pump


a. The ratio between Manometric head and the head imparted by the impeller to waterb. The ratio between power at the impeller and power at the shaftc. The ratio between the power output of the pump and the power input to the pump


a) The ratio between Manometric head and the head imparted by the impeller to waterb) The ratio between power at the impeller and power at the shaftc) The ratio between the power output of the pump and the Manometric headd) None of the above

31. The discharge through a double acting reciprocating pump is

32. Air vessel in a reciprocating pump is used a) To run the pump at a high speed without separationb) To increase suction headc) To increase the delivery head

d) None of the above33. Which one is the best example for rotodynamic pump?

34. Human heart is a example of ______________ pump.

35. Which pump having diffuser section in delivery part?

36. The work done by impeller of a centrifugal pump on water per second per unit weight of water is given by


37. The manometer head (Hm) of a centrifugal pump is given by

a. Q= ALN / 60b. Q= 2ALN/ 60c. Q= ALNd. Q= 2AL

38. The manametric efficiency (ηman) of a centrifugal pump is given by

b)

40. To produce a high head by multistage centrifugal pumps the impellers are connected

41. Specific speed of a pump is the speed at which a pump runs when

42. During suction stroke of a reciprocating pump, the separation may take place

43. During delivery stroke of a reciprocating pump, the separation may take place

44. Hydraulic ram is pump which works

39. Mechanical efficiency (ηmech) of a centrifugal pump is given by

45. To discharge a large quantity of liquid by multistage centrifugal pumps the impellers are connected

46. The sum of suction head and delivery head is known as ____________

47. The manometric head is equal to __________

48. Overall efficiency of the centrifugal pump is equal to __________

49. The vane angle made in centrifugal pump at outlet is _______________

50. Head lost at inlet in centrifugal pump

51. The vane angle made in centrifugal pump at inlet is _______________

52. The gear pump is worked as ________ pump

53. The oil is filled in gear pump

a) Space between teeth and the casing b) Space between teeth and gearc) Space between casesd) Space between suction and delivery pipes

54. Discharge per second of the gear pump is _______________

55. The volumetric efficiency in the gear pump is ________________

56. The vane pump is used for pumping

57. Electromagnetic pump is used for pumping

58. The oil is filled in vane pump

a) Space between teeth and the casing b) Space between teeth and gearc) Space between case and delivery piped) Space between vanes and case

59. The eccentricity of vane pump is increased

60. Which of the following components are important to pump oil in vane pump?

Ans : [b]

Ans : [c]

Ans : [c]

Ans : [b]

Ans : [b]

Ans : [c]

(Ans : d)

Ans:(a)

Ans. a

Ans : [c]

b.d.

b.d.

b.d.

Ans. d

Ans. d

Ans. C

Ans. B

Ans. A

Ans. C

Ans. A

Ans . a

Ans.c

Ans. (b)


is equal to the reciprocal of the sum of the rate of flow in each pipe

Ans. C

Ans. d

Ans. d

Ans.c

Ans.b

.

Ans: (a)

from the leading edge over a flat plate varies as

from the leading edge over a flat plate varies as

Ans: (b)

Ans: (c)

Ans: (a)

Ans.a


Power available at the inlet of turbine to power given by water to the runner

Ans.c

Ans.b


Ans. C

Ans.d

Ans.a

3. To discharge a large quantity of liquid by multistage centrifugal pump the impellers are connected

Ans.a.

Ans. a

9. In case of forced vortex the rise of liquid level at the ends is……. The fall of liquid level at the axis of rotationless than b.

equal to d.

10. In case of a closed cylindrical vessel sealed at the top and the bottom the volume of air before rotation …… the volume of air after rotation more than b.equal to d.

b) The percentage of power saved by fitting air vessels is more in a double acting than in a single acting pump.c) The reciprocating pumps can handle only low viscosity liquids free from impurities.

During suction, the separation may take place at the beginning of suction stroke

Indicator diagram shows variation of pressure head in the cylinder for one revolution of crank

16. Which of the following statements is correct with reference to an impeller with backward curved vanes?

Ans : ( a)

a) The ratio between Manometric head and the head imparted by the impeller to water

Ans :b

Ans :c

Ans :d

Ans. A

a) Gear pump b) Vane pumpd) Centrifugal pump

a) Reciprocating b) Centrifugal c) Axial flow

a) Circumferential piston pump b) Vane pumpc) Centrifugal pump d) Screw pump

36. The work done by impeller of a centrifugal pump on water per second per unit weight of water is given bya)

b)

c)

a) Pressure head at outlet of pump – pressure head at inletb) Total head at inlet – Total head at outletc) Total head at outlet - Total head at inlet d) None of the above

a)

c)

d)

a) Power at the impeller/S.H.Pb) S.H.P/Power at the impellerc) Power possessed by water/ Power at the impellerd) Power possessed by water/S.H.P

a) in parallelb) in seriesc) in parallel & seriesd) None of the above

a) Head developed is unity and discharge is one cubic metreb) Head developed is unity and shaft horse power is also unityc) Discharge is one cubic metre and shaft horse power is also unityd) None of the above

a) at the end of the suction strokeb) in the middle of suction strokec) in the beginning of the suction stroked) None of the above

a) at the end of the delivery strokeb) in the middle of delivery strokec) in the beginning of the delivery stroked) None of the above

a) on the principle of water - hammerb) on the principle of centrifugal actionc) on the principle of reciprocating actiond) None of the above

45. To discharge a large quantity of liquid by multistage centrifugal pumps the impellers are connected a) in parallelb) in seriesc) in parallel & seriesd) None of the above

a) Static headb) Stagnation headc) Dynamic headd) Velocity head

b) Total head at outlet – Total head at inlet

d) All the above

d) All the above

a) Between relative velocity vector and flow velocity vectorb) Between absolute velocity vector and flow velocityc) Between flow velocity and tangential velocity vector d) Between relative velocity vector and tangential velocity vector Ans. D

a) The square of change in tangential velocity at inletb) The square of change in tangential velocity at inlet/2gc) The square of change in absolute velocity at inletd) The square of change in relative velocity at inlet Ans. B

a) Vw2u2/g

c) Hs+hfs+hds+V2d/2g

a) ηmanxηm

b) ηo = {(W/g)(Hm/1000)}/S.Pc) ηo = mHm/1000/S.P

a) Between relative velocity vector and tangential velocity vectorb) Between absolute velocity vector and flow velocityc) Between flow velocity and tangential velocity vector d) Between relative velocity vector and flow velocity vector Ans. A

a) Centrifugal b) Reciprocatingc) Rotaryd) Piston

Ans. A

a) Volume of oil per revolution X No. of revolution in one secondb) Volume of oil per revolution X No. of revolution in one minutec) Volume of oil per revolution X Motor RPMd) None of the above

a) The ratio of Actual discharge to theoretical dischargeb) The sum of Actual discharge and theoretical dischargec) The multification of Actual discharge and theoretical discharged) None of the above

a) Waterb) Oilc) Liquid metald) Gas

a) Waterb) Oilc) Liquid metald) Gas

a) Discharge also increasedb) Discharge will decreasec) No change in discharged) None of the above

a) Vanesb) Vanes and rotorc) Vanes, rotor and cam ringd) Vanes, rotor, cam ring and case

Ans:(a)

Ans:(b)

Ans:(b)

Ans:(b)

Ans:(a)

Ans:(a)

Ans:(a)

Ans:(a)

Ans:(a)

Ans:(c)

Ans:(c)

Ans:(d)

Ans:(a)

Ans:(d)

Ans:(b)

Ans:(a)

Ans:(d)

Ans:(c)

Ans:(c)

Ans:(b)

Ans:(a)

Ans:(d)

Ans:(c)

Ans:(b)

Ans(b)

Ans:(c)

Ans:(a)

Ans : [c]

Ans : [b]

Ans : [b]

Ans : [b]

Ans : b

Ans : b

Ans :d

Ans : c

Ans : b

Ans :a

Ans : [d]

Ans : a

Ans : b

Ans :a

Ans :d

Ans :b

Ans :b

Ans :d

Ans :a

Ans :c

Ans :d

Ans :a

Ans :b

Ans :d

Ans:(c)

Ans:(a)

Ans:(d)

Ans : a

Ans :a

Ans:(d)

Ans:(d)

Ans:(b)

Ans : [b]

Ans : [b]

Ans : [b]

Ans : [c]

Ans : [d]

Ans : [b]

Ans : [b]

Ans : [d]

Ans : [a ]

Ans. C

Ans : (b)

Ans : (a)

Ans : (d)

Ans : (b)

Ans : ( b)

Ans. C

Ans. C

Ans. B

Ans. b

Ans. c

Ans.b.

Ans. C

Ans. C

Ans. b

Ans.d

Ans. B

Ans. d

Ans.d

Ans. c

Ans. C

Ans.c

Ans. C

Ans. b

Ans. b

Ans. b

Ans.d

Ans. (b)

Ans. (a)

Ans. C

Ans. c

Ans. C

Ans. b

Ans. a

Ans. b

Ans. d

Ans. c

Ans. a

Ans. a

Ans.c

Ans.b

Ans.b

Ans.b

Ans.c

Ans.b

Ans.b

Ans.a

Ans.b

Ans.c

Ans.d

Ans. b

Ans.c

Ans.c

Ans.a

Ans.b

Ans.b

Ans.b

Ans.d

Ans.b.

Ans. C

Ans.a

Ans. d

Ans. A.

Ans.a

Ans.c

Ans. C

Ans.c.

Ans.c

Ans.a

Ans.b

Ans.a

Ans.b

Ans.d

Ans.b.

Ans. C

Ans.a

Ans. d

Ans. C

Ans. a.

Ans.a

Ans.c

Ans. C

Ans.c.

Ans.c

Ans.a

Ans.b

Ans. C

Ans. d

Ans. C

Ans.d

Ans.d

Ans.d.

Ans.d

Ans. a

Ans.a

Ans.a.

Ans.a.

Ans. a

Ans. a

Ans : ( b)

Ans : ( d)

more thannone of the above Ans : ( c)

less thannone of the above Ans : ( c )

Ans : (a)

Ans : ( c)

Ans : (b)

Ans : (d)

Ans : (d)

Ans : a)

Ans : (b)

Ans : ( b)

Ans : ( b)

Ans d)

Ans :a

Ans. b

c) Reciprocating pumpAns. D

b) Centrifugal d) Mixed flow Ans. A

d) Screw pump Ans. C

Ans. B

Ans. C

Ans. B

Ans. A

Ans.B

Ans.A

Ans.C

Ans. A

Ans. A

Ans.A

Ans.A

Ans. D

Ans.A

Ans. C

Ans. A

Ans. A

Ans. B

Ans. C

Ans.D

Ans. A

Ans. D

Question Choice1 Choice2

UNIT - I

Fluid solid

Newton Pascal ρ μ

normal temperatureabsolute zero

adhesive cohesive

viscosity surface tension

kinematic viscosity Dynamic viscosity

Compressibility Viscosity

surface tension viscosity

1 Pascal kilo Pascal 760mm of mercury

Absolute pressure static pressure

0.7x13.6

flowing boiling

Steady flow Laminar flow

discharge velocity

Q1=Q2 a1v1 = a2v2

stream line path line

mass density specific weight

1. A substance that deforms continuously by applications of smallest shear force is

2. The unit for pressure3. The symbol for mass density4. Specific weight of water at 20oC is 9810kg/m3 9810N/ m3

5. The minimum temperature limit is called___________ it as a value of -273 oC

6. Force acts to hold two separate bodies together is termed as

7. It is the measure of resistance to shearing motion

8. The ratio of dynamic viscosity to mass density is termed as

9. It measures the elasticity in fluid

10. __________ is one of the causes of the upward flow of water in the soil and in plants

11. The unit of pressure one bar is 12. Atmospheric pressure at sea level at 150C is 101.3 kN/m2

13. When the pressure measured above atmospheric pressure it is called

14. Calculate the density of petrol of specific gravity 0.7 700kg/m3

15. Pressure on liquid is equal to or less than vapour pressure , the liquid starts

16. This is the type of flow in which the velocity at any given time does not change with respective to space


18. Continuity equation is

19. A grid obtained by drawing a series of stream lines and equipotential line is known as

20 It is a product of mass density and gravitational acceleration

21When fluid mechanics is applied to fluid at rest is Fluid statics fluid dynamics

density velocity

23.Newton’s second law (a)F=m/a (b) m=f x a 24.The basic unit for mass is (a)Newton (b)kilogram25.Unit for power (a)Newton (b)Watt 26.The unit for energy (a)Newton (b)Pascal 27. One pascal is

28. An ideal fluid is defined as the fluid which

29. Newton’s law of viscosity states that a. shear stress is dib. shear stress is di

30.A Newtonian fluid is defined as the fluid which a. is incompressibl b. obeys Newton’s

31..Kinematic viscosity is defined as equal to a. dynamic viscosit b.dynamic velocity/32. The expression weight per unit volume is (a)mass density (b) Specific weight33. The symbol for viscosity (a)ρ b) μ34. Specific weight of mercury is

36.The expression inverse of mass density is (a)mass density (b)specific gravity

(a)mass density (b)specific weight

39..Kinematic viscosity is defined as equal to a. dynamic viscosit b.dynamic velocity/40. Relative Density of Water is (a)1 (b)9810 41. Specific gravity of water is (a)1000 (b)1 42.Relative density of mercury is (a)13.6 b)1360043. The unit of viscosity in SI unit is (b) N-s/Kg

44.In CGS system unit of kinematic viscosity is (a)poise (b)stokes

(a)13.6 (b) 760mm

46. The unit of relative density is (b)pa-s 47. The unit of bulk modulus in SI unit is (b)pa-s 48.The unit of mass density in SI unit is (b)pa-s 49.The unit of visocity in SI unit is (b)pa-s 50.In CGS system unit of viscosity is (a)poise (b)stokes 51. The ratio of volume to mass of the fluid is termed as (a)compressibility (b)specific volume52. The ratio of mass to volume of the fluid is termed as (a)compressibility (b) Specific volum


(a)N/m2 (b) N/mm2

a. is ompressible b. is compressible

(a)13.6kg/m3 (b) 13600N/ m3

35.Specific weight of water at 20oC is (a)9810kg/m3 (b)9N/ m3

37.It is a product of mass density and gravitational acceleration

38.The ratio of specific weight of liquid to specific weight of water is (a) specific gravity (b) specific weight

(a)N-S/m3

45. Standard atmospheric pressure in terms of mercury is _____________

(a)N/m2

(a)N/m2

(a)N/m2

(a)N-S/m2

53. The compressibility of the fluid is the reciprocal of (a) density (b)viscosity 54. The bulk modulus of the fluid is the reciprocal of (a)compressibility (b)viscosity

56.It is a product of mass density and volume of the fluid (a)mass (b)specific weight57. The ratio of density of liquid to density of water is a. specific gravity b.specific weight

(a)surface tension (b)viscosity

a.Absolute pressureb.static pressure

UNIT - II

1. An ideal fluid is defined as the fluid which a. is compressible b.is incompressible

2. Newton’s law of viscosity states that a. shear stress is dib. shear stress is di

3.A Newtonian fluid is defined as the fluid which a. is incompressibl b. obeys Newton’s

4. Kinematic viscosity is defined as equal to a. dynamic viscosit b.dynamic velocity/5. Dynamic Viscosity has the dimensions as6.Poise is the unit of a.mass density b.kinetic viscosity

7. The increase of temperature a.increases the viscb.decreases the visc

8. Stoke is the unit of a.surface tension b.viscosity

a.9.81 b.98.1

10.Surface tension is the ratio of a.force per unit are b.force per unit len

a.is equal to 1.0 b.is equal to 0.50

12.Pascal’s law states that at a point is equal in all directions a.in a liquid at rest b.in a fluid at rest

55.In capillary rise the angle of contact between mercury and glass tube is (a)0o (b)228 o

58.__________ is one of the causes of the upward flow of water in the soil and in plants

59.When the pressure measured above atmospheric pressure it is called

60.In capillary rise the angle of contact between mercury and glass tube is (a)0o (b)128 o

a.MLT -2 b.ML-1 T-1

9.The dividing factor for converting one poise into MKS unit of dynamic viscosity is

11.The gases are considered incompressible when Mach Number

a.density of the flui b.specific weight of

14.Fluid static’s deals with a.visdcous and pre b.viscous and gravi

15.Gauge pressure at a point is equal to a.absolute pressur b.absolute pressur

16.Atmospheric pressure held in terms of water column is a.7.5m b.8.5m

17.The necessary condition for the flow to be steady is that a.the velocity does b.the velocity is co

18.The necessary condition for the flow to be uniform is that a.the velocity is co b.the velocity is co

19.A stream line is a line a.which is along theb.which is always pa

a.0.6 to 0.7 b.0.7 to 0.8

21. A flow is said to be turbulent when a. the fluid particl b. the Reynold num

22. Bernoulli’s equation is derived making assumptions that

a. co-efficient of d b. co-efficient of ve

24.Pitot tube is used for measurement of a. Pressure b. Flow

25.In a steady flow the velocity

a.laminar flow b.turbulent flow

a.Venturimeter b.Orifice meter

a.equal to b.much smaller tha

29. The piezometric head is the summation of a. velocity head an b. pressure head a

30.venturimeter is used to measure a. average velocity b. velocity at a poin

13.The hydrostatic law states that rate of increase of pressure in a vertical direction is equal to

20.The range for co efficient of discharge for a venture meter is

a. the flow is uniform and incompressibleb. the flow is non-viscous, uniform and steady

23. The ratio of actual discharge of a jet of water to its theoretical discharge is known as

a. does not change from place to placeb. at a given point does not change with time

26..If the Reynolds number is less than 2000, the flow in a pipe is

27. In which of the following measuring devices Bernoulli’s equation is used?

28. The co-efficient of discharge of an orifice meter is ……. that of a venturimeter

a. parabolic law b. Linear law

32. Hydraulic gradient line (H.G.L) represents the sum of a. Pressure head a b. Kinetic and dat

a. is equal to the s b. is equal to the r

a. Reynold Number b. Reynold number

a. free stream velocb. 0.9 times the fre

36. The boundary layer separation takes place if a. pressure gradientb. Pressure gradient

a. in the direction o b. perpendicular to

a. in the direction o b. perpendicular to

39. Manometer is a device used for measuring a. Velocity at a pointb. Pressure at a poin

40. Differential manometers are used for measuring a. Velocity at a pointb. Pressure at a poin

41. When the fluid is at rest the shear stress is a. Maximum b. Zero

42. The inlet length of a venturimeter a. is equal to the oub. is more than the

43. Flow if a fluid in a pipe takes place from a. Higher level to l b. Higher pressure

a. Steady flow b. Uniform flow

a. Unsteady flow b. Compressible fl

a. Steady flow b. Incompressible f

31. The velocity distribution in laminar flow through a circular pipe follow the

33. When the pipes are connected in series the total rate if flow

34. Boundary layer on a flat plate is called laminar boundary layer if

35. Boundary layer thickness is the distance from the surface of the solid body in the direction perpendicular to flow, where the velocity of fluid is equal to

37. Drag is defined as the force exerted by a flowing fluid on a solid body

38. Lift force is defined as the force exerted by a flowing fluid o a solid body

44. If the velocity, in a fluid flow does not changes with respect to length of direction of flow, it is called

45. If the velocity, in a fluid flow changes with respect to length of direction of flow, it is called

46. If the density of a fluid in constant from point to point in a flow region it is called

a. steady flow b. unsteady flow

a. Steady b. Uniform

a. Unsteady b. Non- uniform

50. Study of fluid at rest is known as a. Kinematics b. Dynamics

a. Kinetic energy b. Pressure energy

52. The term p/ ρg is known as a. Kinetic energy / b. Pressure energy

53. Using Pitot – Tube we can measure in a pipe. a. discharge b. average velocit54. venturimeter is used to measure a. discharge b. average velocity55. Orifice- meter is used to measure a. discharge b. average velocity

a. 70 cm of oil b. 2 m of oil

a. is equal to the s b. is same as in ea

a. 50% b. 66.67%

59. The boundary layer takes place a. for ideal fluids b. for pipe flow only

a. 50% b. 25%

UNIT - III

a. as the square of b. directly as the ve

2.For the laminar flow between two parallel plates

47. If the density of a fluid in changes from point to point in a flow region it is called

48. If the fluid particles move in straight lines and all the lines are parallel to the surface the flow is called

49. If the fluid particles moving in a zig zag way, the flow is called

51. The term v2 / 2g is known as

56. An oil of specific gravity 0.7 and pressure 0.14 kgf /cm2 will have the height of oil as

57. When the pipes are connected in parallel, the total loss of head

58. Maximum efficiency of power transmission through pipe is

60. Maximum efficiency of power transmission through pipe is

1.The loss of pressure head for the laminar flow through pipes varies

a. the maximum velocity = 2.0 times the average velocityb. the maximum velocity = 1.5 times the average velocity

3.The velocity distribution in laminar flow through a circular pipe follow the a. parabolic law b. Linear law

a).Reynolds Number

7. The boundary layer separation takes place if

10. Hydraulic gradient line (H.GL.) represents the sum of

11. Total energy line (T.E.L.) represents the sum of

14. Power. transmitted through pipes, will be maximum when

15. Euler's number is the ratio of (a)inertia force to

16 .Geometric similarity between model and prototype means (b) the similarity of

17. Reynold's number is defined as the

18. Froude's number is defined as the ratio of b)inertia force to gr

19. Models are known undistorted model if (b)the prototype a

4. When the pipes are connected in series the total rate of flow a. is equal to the sum of the rate of flow in each pipe b. is equal to the reciprocal of the sum of the rate of flow in each pipe

5. Boundary layer on a flat plate is called laminar boundary layer if b) Reynolds number is less than 4000


a.free stream velocityb. 0.9 times the free stream velocity

a. pressure gradient is zerob. Pressure gradient is positive

8. Drag is defined as the force exerted by a flowing fluid on a solid body a. in the direction of flowb. perpendicular to the direction of flow

9. Lift force is defined as the force exerted by a flowing fluid o a solid body a. in the direction of flowb. perpendicular to the direction of flow

(a) pressure head and kinetic head (b) kinetic head and datum head

(a) pressure head and kinetic head (b) kinetic head and datum head

12. When the pipes are connected in series. the total rate of flow (a) is equal to the sum of the rate of flow in each pipe (b) is equal to the reciprocal of the sum of the rate of flow in each pipe is

13. When the pipes are connected in parallel the total rate of flow (a) is equal to the sum of the rate of flow in each pipe (b) is equal to the reciprocal of the sum of the rate of flow in each pipe is

(a) Head lost due to friction =1/2total head at inlet of the pipe (b) Head lost due to friction = 1/4 total head at inlet of the pipe

(b) inertia force to elastic force

(a) the similarity of discharge

(a) ratio of inertia force to gravity force (b) ratio of viscous force to gravity force

a) Inertia force to viscous force.

(a) the prototype and model are having different scale ratios

(a)Reynolds numbe(b) Mach number

21.The boundary-layer takes place (b) for real fluids


23. Laminar sub-layer exists in.

(b) Xl/2

26. The separation of boundary layer (b) positive pressur

27. Loss of head at the entrance of the pipe28. Loss of head at the exit of the pipe29. Loss of head at the sudden expansion of the pipe


(a) less than the cri (b) equal to critical

34. The laminar flow is characterised by (a) existence of ed (b) irregular motion

35. Which of the following is an example of laminar flow? (a) underground fl (b) flow past tiny b

(a) parallel to the d (b) normal to the di

(a) Prandtl (b) Pascal

20 . Model analysis of aero planes and projectile moving at supersonic speed based on

(a) for ideal fluids

(a) Reynold number is more than 2000 (b) Reynold number is more than 4000

(a) Laminar boundary layer region (b) Turbulent boundary layer region

24. The thickness of laminar boundary layer at a distance x from the leading edge over a flat plate varies as (a) x4/5 (b)X1/2

25 .The thickness of turbulent boundary layer at a distance x from the leading edge over a flat plate varies as (a) X4/5

(a) negative pressure gradient

(a)0.5 v2/2g (b) v2/2g(a) 0.5 v2/3g (b) v2/2g0.5 v2/3g 2v2/2g

30. Energy Loss due to friction of the pipe is given by the Darcy formula is a) 4flv2/d2g b) 2v2/2g

(a) Reynold number is more than 2000 (b) Reynold number is more than 4000

32. The viscous flow is characterised by Reynolds number which is

33.The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place is (a) 1/RN (b) 4/RN

36. The pressure gradient in the direction of flow is equal to the shear gradient in the direction

37. ------------- studied the laminar flow through a circular tube expirementally

38. -------------- is the commonly used equation for the velocity distribution for the laminar flow through pipes (a) u = umax [ 1 – (r/R)](b) u = umax [ 1 – (r/R)2]

(a) 1/3 (b) 2/3

(a) the top of the p (b) the bottom of th

42. For viscous flow co-efficient of friction is given by (a) f = (8/Re) (b) f = (16/Re)

43. In case of viscous flow through circular pipes

(a) Relative roughne(b) Relative roughn

(a) steady flow (b) unsteady flow

46. Laminar flow takes place at (a) very low velocit (b) very high velocit

(a) critical velocity (b) velocity of appr

48. The velocity at which the laminar flow stops is known as (a) velocity of appr (b) lower critical ve49. The velocity at which the laminar flow starts is known as (a) velocity of appr (b) higher critical v

(a) velocity of appr (b) super sonic vel

(a) sudden enlarge (b) sudden contract

52. The energy loss in a pipe line is due to (a) surface roughne(b) viscous action o

53. Loss of head due to sudden enlargement is given as54. Loss of head due to sudden contraction is given as55. Loss of head due to an obstruction is given as

(a) less than 2000 (b) more than 4000

57. A flow is called super-sonic if the (a) velocity of flow (b) discharge is dif

39. In laminar flow the pressure drop per unit length of pipe is given as (a) 32uμ/D2 (b) 2uμ/D2

40. The momentum correction factor β for a circular pipe is equal to

41. The maximum velocity in a circular pipe when flow is laminar occurs at

(a) u = 2 umax (b) u = umax /2

44. The Darcy-Weisbach friction factor f which is a direct measure of resistance to flow in pipes depends on which of the following?

45. A flow in which the viscosity of fluid is dominating over the inertia force is called

47. The velocity at which the flow changes from laminar flow to turbulent flow ia called

50. The velocity corresponding to Reynolds number of 2800, is called

51. Darcy-Weishbach equation is used to find loss of head due to

(a) (V1-V2)3/2g (b) (V1-V2)2/2g(a) V2

2/g [(1/Cc)-1] 2 (b) V22/g [(1/Cc)-1] 3

(a) [{A/(A-a)} -1] 2 V2/g(b) [{A/Cc (A-a)} -1] 2 V2/g

56. The flow in a pipe is either laminar or turbulent when Reynolds number is

(a) lift (b) drag

(a) lift (b) drag

(a) less than (b) more than

Unit IV1 Maximum efficiency of power transmission through pipe is 2. The boundary layer takes place


7.The net head (H) on the turbine is given by8.Hydraulic efficiency of a turbine is defined as the ratio b)Power at the shaf9.Mechanical efficiency of a turbine is the ratio of 10. The overall efficiency of a turbine is the ratio of 11.A turbine is called impulse if at he inlet of the turbine12. Francis turbine is 13. Flow ratio is defined as the ratio of14. The speed ratio foe Pelton wheel varies from 15.Unit speed is the speed of a turbine when it is working 16. Unit discharge is the discharge of a turbine when17. Unit power is the power developed by a turbine when head on turbine is uhead = one metre a18. Main characteristics curves of a turbine means19.Operating characteristics curves of a turbine means20. Governing of a turbine means21.A turbine is a device which converts a. Electrical ener b. Mechanical energ

23.The net head (H) on the turbine is given by24. Hydraulic efficiency of a turbine is defined as the ratio 25.Mechanical efficiency of a turbine is the ratio of 26. The overall efficiency of a turbine is the ratio of 27.A turbine is called impulse if at he inlet of the turbine28. Francis turbine is 29. Kaplan Turbine is 30.Flow ratio is defined as the ratio of31.The speed ratio foe Pelton wheel varies from 32.Unit speed is the speed of a turbine when it is working 33. Unit discharge is the discharge of a turbine when

58. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as59. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at the right angles to the direction of flow of the liquid, is known as60.When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure---------- that if the same plate is immersed perpendicular to the flow.

a. 50% b. 66.67%a. for ideal fluids b. for pipe flow only3. The boundary layer is called turbulent boundary layer in

flow over plates if a. Reynolds number is more than 2000b. Reynolds number is more than 40004. The drag force exerted by a fluid on a body immersed in the fluid is due to a. pressure and viscous forceb. pressure and gravity forces

a. Hydraulic energy into mechanical energyb. Mechanical energy into hydraulic energy6. Efficiency of the jet of water having velocity V and striking a series of vertical plates moving with a velocity u is maximum when a. u = 2V b. u= V/2

a. H= Gross Head + Head lost due to frictionb. H= Gross Head – Head lost due to frictiona) Power available at the inlet of turbine to power given by water to the runnera. Power at the inlet to the power at the shaft of turbineb. Power at he shaft to the power given to the runnera. Power at the inlet of turbine to the power at the shaftb. Power at the shaft to the power given to the runnera. total energy is only kinetic energyb. total energy is only pressure energya. an impulse turbineb. a radial flow impulse turbinea. velocity of flow at inlet to the velocity given (2gH) ½ b. Velocity of runner at inlet to the velocity of flow at inleta. 0.45 to 0.50 b. 0.6 to 0.7a. under unit head and develops unit powerb. Under unit head and discharge one m3/ seca. The head on turbine is unity and it develops unit power.b. The head on turbine is unity and it moves at unit speed

a. Curves at constant speedb. Curves at constant efficiencya. curves drawn at constant headb. Curves at constant speeda. The head is kept constant under all condition of workingb. The speed is kept constant under all conditions

22. Efficiency of the jet of water having velocity V and striking a series of vertical plates moving with a velocity u is maximum when a. u = 2V b. u= V/2

a. H= Gross Head + Head lost due to frictionb. H= Gross Head – Head lost due to frictiona. Power available at the inlet of turbine to power given by water to the runnerb. Power at the shaft of the turbine to power given by water to the runnera. Power at the inlet to the power at the shaft of turbineb. Power at he shaft to the power given to the runnera. Power at the inlet of turbine to the power at the shaftb. Power at the shaft to the power given to the runnera. total energy is only kinetic energyb. total energy is only pressure energya. an impulse turbineb. a radial flow impulse turbinea. an impulse turbineb. a radial flow impulse turbine a. velocity of flow at inlet to the velocity given (2gH) ½ b. Velocity of runner at inlet to the velocity of flow at inleta. 0.45 to 0.50 b. 0.6 to 0.7a. under unit head and develops unit powerb. Under unit head and discharge one m3/ seca. The head on turbine is unity and it develops unit power.b. The head on turbine is unity and it moves at unit speed

34.Unit power is the power developed by a turbine when35.Main characteristics curves of a turbine means36.Operating characteristics curves of a turbine means37.Governing of a turbine means

39. Francis turbine is an impulse turbine a radial flow impuls40. Kaplan Turbine is an impulse turbine a radial flow impuls41. A pump is defined as a device which converts 42. A turbine is a device which converts43.Flow ratio is defined as the ratio of Velocity of runner at44.The speed ratio foe Pelton wheel varies from 0.05 to 0.50 0.6 to 0.745. Breaking jet in an impulse turbine is used to bring the runner

47. A pelton wheel is48. An impulse turbine used for high head of wate49. The condition of maximum efficiency of Pelton wheel V = 2gh

Francis turbine Kaplan turbineSuddenly drooped increase

52. Flow ratio is53. The specific speed of a hydraulic turbine depends upon speed and power d discharge and po

55. The power developed by a turbine is directly proporti directly proportioKaplan turbine25 to 250m

58. For 450m head of water ____________ shall be used Pelton wheel Kaplan turbine

equal to 1.2 times60. Which of the following statement is wrong the reaction turbi

UNIT V1.The discharge through a single acting reciprocating pump is a.Q= ALN / 60 b.Q= 2ALN/ 602. Mechanical efficiency of a centrifugal pump is given by a.Power at the impel

a) in parallel b) in series

a) head developed i

5. The discharge through centrifugal pump is b) Q= 2ALN/ 60

6. Air vessel in a reciprocating pump is used a) To obtain a cont b) To increase suct

a. head on turbine is unity and discharge is also unityb. head = one metre and speed is unitya. Curves at constant speedb. Curves at constant efficiencya. curves drawn at constant headb. Curves at constant speeda. The head is kept constant under all condition of workingb. The speed is kept constant under all conditions 38. The monometer head (Hm) of a centrifugal pump is

given by a. Pressure head at outlet of pump – pressure head at inletb. Total head at inlet – total head at outlet

a. Hydraulic energy into mechanical energyb. Heat energy into hydraulic energya. Heat energy into mechanical energyb. Mechanical energy into hydraulic energyvelocity of flow at inlet to the velocity given (2gH) 1/3

to break the jet of water46. Work done by a turbine ___________ the weight of water flowing per second depends upon does not depends upon

tangential flow impulse turbine inward flow impulse turbine low head of water u = V1 / 2

50. Spiral casing used in the case of _________________ turbines51. A jet of deflector is used in Pelton turbine when the load ____________

flow velocity / blade velocity flow velocity / relative velocity

54. The cavitations in reaction turbine is avoided to a great extent by installing the turbine below the tailrace level using stainless steel runner of the turbine

56. Which of the following turbines preferred for 0 to 25 m head of water Pelton wheel57. A Francis turbine is used when the available head of water is 0 to 25 m

59. The depth of the bucket for a Pelton wheel is generally ___________ diameter of jet

the angle of taper on draft tube is less than 8 degree

b.S.H.P./ Power at he impeller

3. To discharge a large quantity of liquid by multistage centrifugal pump the impellers are connected

4. Specific speed of a pump is the speed at which a pump runs when b.head developed is unity and shaft horse power is also unity

a) Q= πDBVf1

a) a change in presb) torque

8. Which of the following is an example of free vortex flow? a) a whirlpool in a r b) Flow of liquid in

a) less than b) more than

a) less than b) more than

a) The limiting valu b) During suction,

12. Reciprocating pumps are most suited where a) Constant heads ab) Operating speed

a) The reciprocatin b) The percentage of

a) To get continuousb) To save the powe

a) One side shroud b) Two sides shrou

a) It has a falling b) It has a rising h

17. The delivery valve while starting centrifugal pump is kept a) Fully closed b) Fully open

18. Which of the following is not a dimensionless parameter? a) Friction factor b) Specific speed

a) Radial flow type b) Axial flow type

a) Fan b) Blower

21. The delivery valve while starting centrifugal pump is kept22. Manometric efficiency of the centrifugal pump a) The ratio betweeb) The ratio betwe23. Mechanical efficiency of the centrifugal pump a) The ratio betwee24. Overall efficiency of the centrifugal pump25. Overall efficiency of the centrifugal pump26. Slip of reciprocating pump is a) The difference b b) The ratio betwee 27. Negative slip of reciprocating pump is a) The difference b b) The ratio betwee28. Negative slip of reciprocating pump occurs when a) Delivery pipe is b) Suction pipe is l

a) Double acting b) Single acting

7. The change in moment of fluid due to flow along a curved path results in

9. In case of forced vortex the rise of liquid level at the ends is……. The fall of liquid level at the axis of rotation

10. In case of a closed cylindrical vessel sealed at the top and the bottom the volume of air before rotation …… the volume of air after rotation

11. With respect to a reciprocating pump which of the following statements is incorrect?

13. Which of the following statements is incorrect for a reciprocation pump?

14. In a reciprocating pump the air vessels are used for which of the following purposes?

15. Which of the following types of impeller is used for centrifugal pumps dealing with muds?

16. Which of the following statements is correct with reference to an impeller with backward curved vanes?

19. Higher specific speeds (160 to 500) of centrifugal pump indicate that the pump is of

20. The machine can rise the fluid pressure upto 1 atm. is called

a) Fully open b) Half open

b) The ratio between power at the impeller and power at the shafta.The ratio between Manometric head and the head imparted by the impeller to waterb.The ratio between power at the impeller and power at the shafta) The ratio between Manometric head and the head imparted by the impeller to waterb) The ratio between power at the impeller and power at the shaft

29. If the water is in contact with one side of the piston the reciprocating pump is called

a) Double acting b) Double stage

32. Air vessel in a reciprocating pump is used a) To run the pump b) To increase suct33. Which one is the best example for rotodynamic pump? a) Gear pump b) Vane pump34. Human heart is a example of ______________ pump. a) Reciprocating b) Centrifugal 35. Which pump having diffuser section in delivery part? a) Circumferential b) Vane pump

a) Pressure head atb) Total head at inl

a) Power at the impb) S.H.P/Power at t


a) Head developed ib) Head developed i

a) at the end of the b) in the middle of

a) at the end of the b) in the middle of

44. Hydraulic ram is pump which works a) on the principle b) on the principle o


a) Static head b) Stagnation head

47. The manometric head is equal to __________ b) Total head at out

a) Between relative b) Between absolute

30. If the water is in contact with both sides of the piston the reciprocating pump is called

31. The discharge through a double acting reciprocating pump is a. Q= ALN / 60 b. Q= 2ALN/ 60

36. The work done by impeller of a centrifugal pump on water per second per unit weight of water is given by a) vw1u1/g a) vw2u2/g

37. The manometer head (Hm) of a centrifugal pump is given by

38. The manametric efficiency (ηman) of a centrifugal pump is given by a) Hm/gvw2u2 b) gHm/vw2u2

39. Mechanical efficiency (ηmech) of a centrifugal pump is given by40. To produce a high head by multistage centrifugal pumps the impellers are connected 41. Specific speed of a pump is the speed at which a pump runs when

42. During suction stroke of a reciprocating pump, the separation may take place

43. During delivery stroke of a reciprocating pump, the separation may take place

45. To discharge a large quantity of liquid by multistage centrifugal pumps the impellers are connected

46. The sum of suction head and delivery head is known as ____________

a) Vw2u2/g

48. Overall efficiency of the centrifugal pump is equal to __________ a) ηmanxηm b) ηo = {(W/g)(Hm/1000)}/S.P

49. The vane angle made in centrifugal pump at outlet is _______________

50. Head lost at inlet in centrifugal pump a) The square of chab) The square of cha

a) Between relative b) Between absolute

52. The gear pump is worked as ________ pump a) Centrifugal b) Reciprocating

53. The oil is filled in gear pump a) Space between tb) Space between t

a) Volume of oil perb) Volume of oil per

a) The ratio of Actu b) The sum of Actua

56. The vane pump is used for pumping a) Water b) Oil57. Electromagnetic pump is used for pumping a) Water b) Oil58. The oil is filled in vane pump a) Space between tb) Space between t

59. The eccentricity of vane pump is increased a) Discharge also i b) Discharge will d

a) Vanes b) Vanes and rotor

51. The vane angle made in centrifugal pump at inlet is _______________

54. Discharge per second of the gear pump is _______________

55. The volumetric efficiency in the gear pump is ________________

60. Which of the following components are important to pump oil in vane pump?

Choice3 Choice4 Answer Answer

both a & b none of the above Fluid 1

Joule none of the above Pascal 2ψ Ф ρ 1

all the above 2

standard temperatuall the above absolute zero 2

visocity surface tension adhesive 1

both a & b capillary rise viscosity 1

both A & B none of the above kinematic viscosity 1

Pressure none the above Compressibility 1

Capillarity vapour pressure Capillarity 3

100kpa 1000kpa 100kpa 310.33m of water all the above all the above 4

vacuum pressure gauge pressure gauge pressure 4

0.7/1000 none of the above 1

evaporating none of the above boiling 2

Uniform flow Rotational flow Uniform flow 3

accelaration all the above discharge 1

q1/q2 a&b a&b 4

flow net streakline flow net 3

specific volume specific gravity specific weight 2

9.81kg/m3 9810N/ m3

700kg/m3

both(a)&(b) (d)none of the above Fluid statics 1

accelaration (d)None of the ab None of the above 4

(c)F=m.a (d)none of the abovF=m.a 3 (c)second (d)none of the abo kilogram 2(c)Joule (d)none of the above Watt 2(c)Joule (d) None of the aboJoule 3

1

3

c. shear stress is di d. shear stress is di 2

c. is highly viscous d. is compressible 2

c.dynamic viscosity d.pressure x density dynamic velocity/density 2(c) Relative density (d) None of the abovSpecific weight 2 (c)ψ (d)Ф μ 2

(d) all the above 2(d) None of the above 4

(c) specific volume (d) none of the above specific volume 3

(c)specific volume (d) specific gravity 4

(d) all the above 1

c.dynamic viscosity d.None of the above 4(c) 9.81 (d)1000 1 1(c) 9810 (d) 9.81 1 2(c)1 (d)9.8 13.6 1

(d)none of the abo none of the above 4

(c)mach number (d)all the above stokes 2

(c) 10.3mm (d)none of the above 760mm 2

(c)kg/ms (d)None of the above 4(c)kg/ms (d)all the above 1

(d)all the above 3(c)kg/ms (d)all the above 4(c)mach number (d)all the above poise 1 (c)Specific weight (d)none of the above specific volume 2 (c)Specific weight (d) Mass density 4

(c)KN/m2 (d) KN/mm2 N/m2

c. is incompressible and non-viscous (inviscid)d. has negligible surface tension. is incompressible and non-viscous (inviscid)

shear stress is directly proportional to velocity gradient

obeys Newton’s law of viscosity

(c) 136kg/m3 13600N/ m3

(c) 9.81kg/m3 None of the above

specific gravity

(c) specific volume specific gravity

None of the above

(c) Kgm2/s

None of the above N/m2

(c)kg/m3 kg/m3 all the above

Mass density

(c) bulk modulus (d)none the above bulk modulus 3(c)pressure (d)none the above compressibility 1

(d)none of the abovnone of the above 4

(c) specific volume (d) specific gravity mass 1c. specific volume d. all the above specific gravity 1

(c)vapour pressure (d) None of the ab None of the above 4

c.vacuum pressure d.None of the abov None of the above 4

(d)none of the abov 2

c.is incompressible d.has negligible sur 3

c. shear stress is di d. shear stress is di 2

c. is highly viscous d. is compressible 2

c.dynamic viscosity d.pressure x density dynamic velocity/density 22

c.viscosity d.velocity gradient viscosity 3

c.decreases the visd.increases the visc 2

c.kinetic viscosity d.none of the abov kinetic viscosity 3

c.981 d.0.981 98.1 2

c.force per unit vo d.none of the abpv force per unit length 2

c.is more than 0.3 d.is less than 0.2 is less than 0.2 4

c.in a laminar flow d.in a turbulent flow in a fluid at rest 2

(c) 60 o

(c) 60 o 128 o

is incompressible and non-viscous (inviscid)

shear stress is directly proportional to velocity gradient

obeys Newton’s law of viscosity

c.ML-1T-2 d.M-1L-1T-1 ML-1 T-1

decreases the viscosity of a liquid

c.weight of the fluidd.none of the abovespecific weight of the fluid 2

c. gravity and pres d.surface tension an 3

c.vacuum pressure d.none of the above 2

c.9.81m d.10.30m 10.30m 4

c.the velocity changd.none of the above. 2

c.the velocity changd.none of the above. 2

c.across which ther d.on which tangent d 3

c.0.8 to 0.9 d.0.95 to 0.99 4

c. the fluid particl d.none of the above 1

3

c. co-efficient of co d.co-efficient of visc co-efficient of discharge 1

c. Velocity at a poind. Discharge Velocity at a point 3

2

c.transition flow d.none of the abov laminar flow 1

c.pitot tube d.All of the above All of the above 4

c.much more than d.any of these much smaller than 2

c. velocity head an d. none of the abov 2

c. pressure at a poi d. None of the abo None of the above 4

gravity and pressure forces

absolute pressure minus atmospheric pressure

the velocity is constant at a point with respect to time

the velocity is constant in the flow field with respect to space

across which there is no flow

0.95 to 0.99

the fluid particles moves in a zig zag way

c. the flow is steady, non-viscous, incompressible and irrotational d.none of the above. the flow is steady, non-viscous, incompressible and irrotational

c. may change its direction but the magnitude remain unchangedd.none of the above. at a given point does not change with time

pressure head and elevation head

c. Logarithmic law d. None of the above parabolic law 1

c. Pressure head , d. Pressure head a 4

c. is the same as f d. none of the abov 3

d. None of the abo 3

c. 0.99 times the fr d. None of the abo 3

c. Pressure gradiend. None of the abo 2

c. in the direction d. None of the abo in the direction of flow 1

c. at an angle of 45 d. None of the abo 2

c. Discharge of fluidd. None of the abo 2

c. Difference of pr d. None of the abo 3

c. Unpredictable d. None of the abov Zero 2

c. is less than the od. none of the abov 3

c. Higher energy to d. None of the abov 3

c. Incompressible f d. Rotational flow Uniform flow 2

c. Irrotational flow d. None of the abo None of the above 4

c. Uniform flow d. Rotational flow Incompressible flow 2

Pressure head and datum head

is the same as flowing through each pipe

c. Reynold number is less than 5 x 105 Reynold number is less than 5 x 105

0.99 times the free stream velocity

Pressure gradient is positive

perpendicular to the direction of flow

Pressure at a point in a fluid

Difference of pressure between two points

is less than the outlet length

Higher energy to lower energy

c. Non- uniform flo d. Compressible fl Compressible flow 4

c. Compressible d. Laminar Laminar 4

c. Turbulent d. Incompressible Turbulent 3

c. Statics d. None of the abov Statics 3

c. Kinetic energy ped. None of the abo 3

c. Pressure energy d. None of the abo 3

c. velocity at a pod. pressure at a poi velocity at a point 3c. velocity at a pointd. pressure at a poi discharge 1c. velocity at a poind. pressure at a poi discharge 1

c. 20 cm of oil d. 80 cm of oil. 2 m of oil 2

c. is equal to the r d. none of the abov is same as in each pipe 2

c. 75% d. 100% 66.67% 2

c. for real fluids d. for flow over flat for real fluids 3

c. 75% d. None of the abo None of the above 4

c. as the inverse of d .none of the abovedirectly as the velocity 2

2

parabolic law 1

Kinetic energy per unit weight density Pressure energy per unit weight density

c. the maximum velocity = 1.33 times the average velocityd. none of the above the maximum velocity = 1.5 times the average velocity

c. Logarithmic lawd. None of the above

c. is the same a d. none of the abov 3

3

3

2

in the direction of flow 1

2

4

(d)Pressure head. kine 4

(c)the same as flow 3

(c)both of a &b 1

(d)Head lost due -to 4

(d) none of the abov 1

(c) the similarity of (d)the similarity of the similarity of motion 3

(d) ratio of inertia f 3

(d) inertia force to 2

(d) none of the abo 2

is the same as flowing through each pipe

c) Reynolds number is less than 5 x 105d) None of the aboveReynolds number is less than 5 x 105

c. 0.99 times the free stream velocityd. None of the above 0.99 times the free stream velocity

c. Pressure gradient is negatived. None of the above Pressure gradient is positive

c. in the direction which is at an angle of 45 degree to the direction of flowd. None of the above

c. at an angle of 45 degree to the direction of flowd. None of the above perpendicular to the direction of flow

(c) pressure head. kinetic head and datum head (d)Pressure head and datum head. Pressure head and datum head.

(c) pressure head and datum head Pressure head. kinetic head and. datum head.

(d) None of the above. the same as flowing through each pipe

(d) None of the above. is equal to the sum of the rate of flow in each pipe

(c) Head lost due to friction = total head at the inlet of the pipeHead lost due -to friction = 1/3total head at the inlet of the pipe.

(c) inertia force to gravity force inertia force to pressure force

(c) ratio of viscous force to viscous force ratio of viscous force to viscous force

(c) inertia force to elastic force . inertia force to gravity force

(c) model and prototype are kinematically similar the prototype and model are having same scale ratio

( c ) froude number (d) None of the aboMach number 2

(c) for pipe flow onl (d) for over flat plates o for real fluids 2

(d) None of t 3

(d) none of 2

(d) none of the ab 2

1


12

none of the above 3

1

(d) None of the abo 3

(c) more than the cr(d) none of the abo 1

3

(c) fluid particles (d) none of the abo 3

(c) Flow of oil in m (d) none of the abo none of the above. 4

(c) both a & (d) none of the abo 2

(c) Hagen and Poise(d) none of the abo Hagen and Poiseuille 3

2

( c ) Reynold number is more than 5 x 105 Reynold number is more than 5 x 105

(c) Transition zone Turbulent boundary layer region

(c) Xl/5 X1/2

(c) Xl/5 (d) X3/5 X4/5

(c) zero pressure gradient positive pressure gradient

(c) ( V1-V2)2/2g (d)none of the above 0.5 v2/2g(c) ( V1-V2)2/2g (d) none of the above v2/2g( V1-V2)2/2g ( V1-V2)2/2g

c) ( V1-V2)2/g d) none of the above 4flv2/d2g

( c ) Reynold number is more than 5 x 105 Reynold number is more than 5 x 105

less than the critical value

(c) 16/RN (d) 64/RN 16/RN

fluid particles moving in layers parallel to the boundary surface

normal to the direction of flow

(c) u = umax [ 1 – (r/R)3](d) u = u2 max [ 1 – (r/R)2]u = umax [ 1 – (r/R)2]


(c) 4/3 (d) 5/3 4/3 3

(c) f = (32/Re) (d) none of the abo f = (32/Re) 3

(b) f = (16/Re) (d) f = (60/Re) f = (16/Re) 2


(c) Roughness heigh(d) none of the abo 3

(c) laminar flow (d) turbulent flow laminar flow 3

(c) both (a) & (b) (d) none of the abo very low velocities 1

(c) sub-sonic veloci (d) super sonic velo critical velocity 1

(c) sub-sonic veloci (d) super sonic velo lower critical velocity 2(c) lower critical vel (d) super sonic velo higher critical velocity 2

(c) lower critical vel (d) higher critical ve higher critical velocity 4

(c) friction (d) none of the abo friction 3

(c) friction offered (d) none of the abo 3

212

(c) between 2000 t (d) none of the abo between 2000 to 4000 3

(c) Mach number is (d) none of these 3

(c) 32uμ/D3 32uμ/D2

(c) u = (3/2) umax u = umax /2

Roughness height, diameter, velocity and kinematic viscosity

friction offered by pipe wall as well as by viscous function

(b) (V1-V2)2/2g (d) (V12-V2

2)/2g (V1-V2)2/2g(c) (V1

3-V23) /2g (d) V2

2/g [(1/Cc)-1] V22/g [(1/Cc)-1] 2

(c) V22/g2 [(1/Cc)-1] 2(d) V2

2/g [(1/Cc)-1] [{A/Cc (A-a)} -1] 2 V2/g

Mach number is between 1 and 6

(c) stagnation pres (d) none of the abo drag 2

(c) stagnation pres (d) none of the abo lift 1

(c) both a & b (d) none of the abo less than 1

66.67% 2331222

c)Power at the shaftd)None of the abov None of the above 42

Power at the shaft to the po 3141133

head on turbine is uone of the above head on turbine is unity 331

The speed is kept constant 2c. Kinetic energy i d. energy into mec Kinetic energy into mecha 1

2242314

an axial flow reaction turbi 3113

The head on the turbine is 3

c. 75% d. 100%c. for real fluids d. for flow over flat plate only for real fluidsc. Reynolds number is more than 5x 105d. None of the above Reynolds number is more than 5x 105

c. Pressure and turbulence forcesd. None of the above pressure and viscous forcec. Kinetic energy into mechanical energyd. None of the above. Mechanical energy into hydraulic energyc. u=3V/ 2 d. u= 4V/2 u= V/2c. H = Gross Head + V2/ 2g – Head lost due to frictiond. None of the above H= Gross Head – Head lost due to friction

c. Power at the shaft to power at the inlet of turbined. None of the above Power at he shaft to the power given to the runnerc. Power at the shaft to the power at the inlet of turbined. None of the abovec. total energy is the sum of kinetic energy and pressure energyd. none of the above total energy is only kinetic energyc. an axial flow turbined. a reaction radial turbine a reaction radial turbinec. Velocity of runner to the velocity given by (2gH) ½ d. None of the above velocity of flow at inlet to the velocity given (2gH) ½

c. 0.3 to 0.4 d. 0.8 to 0.9 0.45 to 0.50c. Under unit headd. None of the above Under unit headc. The head on the turbine is unityd. None of the above The head on the turbine is unity

c. Curves at constant headd. None of the above Curves at constant headc. Curves at constant efficiency d. None of the above curves drawn at constant headc. The discharge is kept constant under all constantsd. None of the above

c. u=3V/ 2 d. u= 4V/2 u= V/2c. H = Gross Head + V2/ 2g – Head lost due to friction d. None of the above H= Gross Head – Head lost due to frictionc. Power at the shaft of the turbine to the power at the inlet of turbined. None of the above None of the abovec. Power at the shaft to power at the inlet of turbined. None of the above Power at he shaft to the power given to the runnerc. Power at the shaft to the power at the inlet of turbined. None of the above Power at the shaft to the power at the inlet of turbinec. total energy is the sum of kinetic energy and pressure energyd. none of the above total energy is only kinetic energyc. an axial flow turbined. a reaction radial turbine a reaction radial turbinec. an axial flow reaction turbined. a radial flow reaction turbine c. Velocity of runner to the velocity given by (2gH) ½ d. None of the above velocity of flow at inlet to the velocity given (2gH) ½

c. 0.3 to 0.4 d. 0.8 to 0.9 0.45 to 0.50c. Under unit headd. None of the above Under unit headc. The head on the turbine is unityd. None of the above

3Curves at constant head 3

1The speed is kept constant 2

3an axial flow turbin none of the above none of the above 4a radial flow reactioNone of the above radial flow reaction turbine 3

None of the above. 44

None of the above None of the above 40.3 to 0.4 None of the above None of the above 4

to bring the runner to res 2None of the above 1

1medium head of whigh discharge high head of water 21/g Vw1 u1 1

3decrease Suddenly drooped 1flow velocity / Sq flow velocity / Sq rt of 3speed and head of 4providing highly p 4

directly proportio directly proportional to 2None of these Kaplan turbine 2

25 to 250m 2Francis turbine Pelton wheel 1

1.8 times 1.2 times2

A Francis turbine A Francis turbine is an 4

c.Q= ALN d.Q= 2ALN Q= ALN / 60 1c.Power possessed b Power at the impeller / S.H 1

c) in parallel and in d) None of the abov in parallel 1

d) None of the abov head developed is unity a 1

c) Q= ALN d) Q= 2AL 1

c) To increase the d) none of the abovTo obtain a continuous supp 1

c. head on turbine is unityd. none of the above head on turbine is unityc. Curves at constant headd. None of the abovec. Curves at constant efficiencyd. None of the above curves drawn at constant headc. The discharge is kept constant under all constantsd. None of the abovec. Total head at outlet- total head at inletd. None of the above Total head at outlet- total head at inlet

c. Kinetic energy into mechanical energyd. None of the above.c. Kinetic energy into mechanical energyd. None of the above None of the aboveVelocity of runner to the velocity given by (2gH) ½

to change the direction of runner none of these depends upon

outward flow impulse turbine inward flow reaction turbine tangential flow impulse turbine

None of the above u = V1 / 2 Both (a) & (b) None of the above Both (a) & (b)

Suddenly increased flow velocity / whirl velocity speed , power developed and head of water speed , power developed and head of water all of the above all of the above

directly proportional to H power ½ Francis turbine Above 250m None of these

None of these

Double An impulse turbines is generally fitted slightly above the tail race

d. Power possessed water / S.H.P.

c.discharge is one cubic metre and shaft horse power is unit.

Q= πDBVf1

c) a change in the t d) none of the abov torque 2

c) Flow of liquid th d) All of the above All of the above 4

c) equal to d) none of the abovequal to 3

c) equal to d) none of the abovequal to 3

The limiting value of separ 1

c) Constant supplie d) None of the abovConstant supplies are requ 3

c) The reciprocatingd) None of the abo The percentage of power sav 2

c) To run the pump d) All of the above All of the above 4

c) Double section d) Open Open 4

c) It is easier to fab d) It cannot run at It has a falling head discha 1

c) Half open d) In any position Fully closed 1

c) Thoma’s cavitat d) Pressure co efficThoma’s cavitations param 2

c) Mixed flow type d) All of above Mixed flow type 2

c) Compressor d) Pump Compressor 2

d) None of the above None of the above 4c) The ratio betwe d) None of the aboveThe ratio between Manomet 1

d) None of the above 2d) None of the above 3d) None of the above None of the above 4

c) The ratio betwee d) None of the above The difference between the 1c) The ratio betwee d) None of the above The difference between ac 1c) pump is running d) None of the above None of the above 4

c) Both of a & b d) None of the above Single acting 2

c)During delivery the separation may take place at the end of delivery d) Indicator diagram shows variation of pressure head in the cylinder for one revolution of crank

c) In any position

c) The ratio between Manometric head and the power output of the pump The ratio between power at the impeller and power at the shaftc. The ratio between the power output of the pump and the power input to the pump The ratio between the power output of the pump and the power input to the pump c) The ratio between the power output of the pump and the Manometric head

c) Both of a & b d) None of the above Double acting 1

4

c) To increase the d) None of the above To run the pump at a high 1c) Reciprocating p d) Centrifugal pum Centrifugal pump 4c) Axial flow d) Mixed flow Reciprocating 1c) Centrifugal pumpd) Screw pump Centrifugal pump 3

2

c) Total head at outld) None of the abo Total head at outlet - Tota3

d) None of the abo2

c) Power possessed d) Power possessed Power at the impeller/S.H 1

c) in parallel & seri d) None of the abo in series 2

c) Discharge is one d) None of the abo Head developed is unity a 1

c) in the beginning d) None of the abo in the beginning of the suc3

c) in the beginning d) None of the abo at the end of the delivery 1

c) on the principle d) None of the abo

on the principle of water 1

c) in parallel & seri d) None of the abo

in parallel 1

c) Dynamic head d) Velocity headStatic head 1

d) All the above All the above 4

d) All the above1

c) Between flow velod) Between relative Between relative velocity 4

c. Q= ALN d. Q= 2AL Q= 2AL

a) vw1u1/g a) vw1u1/g vw2u2/g

b) Hm/vw2u2 gHm/vw2u2

c) Hs+hfs+hds+V2d/2g

c) ηo = mHm/1000/S.P ηmanxηm

c) The square of chad) The square of chaThe square of change in tan 2

c) Between flow velod) Between relative Between relative velocity 1

c) Rotary d) Piston Rotary3

c) Space between d) Space between s Space between teeth and 1

c) Volume of oil pe d) None of the abo Volume of oil per revolutio 1

c) The multification d) None of the aboThe ratio of Actual dischar 1

c) Liquid metal d) Gas Oil 2c) Liquid metal d) Gas Liquid metal 3c) Space between cd) Space between Space between vanes an 4

c) No change in di d) None of the abo Discharge also increased 1

c) Vanes, rotor and d) Vanes, rotor, ca Vanes, rotor, cam ring an 4

Fluid Mechanics Objective Type Questions

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