hydraulics and fluid mechanics MCQs – Page 3

Practise focused hydraulics and fluid mechanics questions with marked answers for exam preparation and subject revision.

hydraulics and fluid mechanics Mcqs

41. In a static fluid__________________?
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A. only normal stresses can exist

B. fluid pressure is zero

C. linear deformation is small

D. viscosity is nil

E. resistance to shear stress is small

42. Density of water is maximum at ___________________?
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A. 0C

B. 100C

C. 0K

D. 4C

E. 20C.

43. The bulk modulus of elasticity with increase in pressure___________________?
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A. increases

B. remains constant

C. decreases

D. unpredictable

E. increases first upto certain limit and then decreases

44. For very great pressures, viscosity of moss gases and liquids __________________?
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A. decreases

B. shows erratic behaviour

C. increases

D. remains same

E. none of the above.

45. Kinematic viscosity is dependent upon________________?
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A. density

B. distance

C. pressure

D. level

E. flow

46. The increase of temperature results in_________________?
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A. increase in viscosity of gas

B. increase in viscosity of liquid

C. decrease in viscosity of gas

D. decrease in viscosity of liquid

E. A. and D. above

47. Which of the following meters is not associated with viscosity__________________?
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A. none of the above

B. Say bolt

C. Red wood

D. Orsat

E. Engler

48. The pressure at a point in a fluid will not be same in all the directions when the fluid is________________?
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A. inviscous and moving

B. viscous and moving

C. viscous

D. viscous and static

E. moving

49. Practical fluids____________________?
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A. possess all the above properties

B. are compressible

C. possess none of the above properties

D. possess surface tension

E. are viscous

50. An object having 10 kg mass weighs 9.81kg on a spring balance. The value of g at this place is___________________?
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A. 9.75 m/sec2

B. 10m/sec2

C. 9 m/sec .

D. 9.81 m/sec2

E. 10.2/m sec

51. The resultant upward pressure of the fluid on an immersed body is called_________________?
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A. center of pressure

B. upthrust

C. buoyancy

D. all the above are correct

E. none of above is correct

52. Which of the following is the unit of kinematic viscosity _________________?
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A. none of the above

B. stoke

C. poise

D. faraday

E. pascal

53. The volumetric change of the fluid caused by a resistance is known as_________________?
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A. adhesion

B. compressibility

C. cohesion

D. volumetric index

E. volumetric strain

54. Surface tension _____________________?
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A. is a function of the curvature of the interface

B. is also known as capillarity

C. acts in the plane of the interface normal to any line in the surface

D. decreases with fall in temperature

E. has no units

55. The units of viscosity are__________________?
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A. kg sec/metre

B. none of the above

C. newton-sec per metre

D. metres2 per sec

E. newton-sec per metre2

56. Choose the correct relationship_________________?
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A. hydrostaticforce = surface tension x gravity.

B. specific gravity = gravity x density

C. kinematicviscosity = dynamicviscosity x density

D. dynamicviscosity = kinematicviscosity x density

E. gravity = specific gravity x density

57. For manometer, a better liquid combination is one having______________?
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A. surface tension is no criterion

B. high density and viscosity

C. low density and viscosity

D. lower surface tension

E. higher surface tension

58. The surface tension of mercury at normal temperature compared to that of water is____________________?
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A. less

B. more

C. more or less depending on size of glass tube

D. none of the above.

E. same

59. A fluid in equilibrium cant sustain_________________?
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A. compressive stress

B. all of the above

C. bending stress

D. shear stress

E. tensile stress

60. An ideal flow of any fluid must satisfy ___________________?
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A. continuity equation

B. Bernoullis theorem

C. boundary layer theory

D. Newtons law of viscosity

E. Pascal law

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