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Engineering
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ME Set-3
Fluid Mechanics
79

Fluid Mechanics MCQ with Answers

79) Surface energy per unit area of a surface is numerically equal to

atmospheric pressure

surface tension

force of adhesion

force of cohesion

Answer is:

surface tension

Fluid Mechanics MCQ with Answers

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Related Fluid Mechanics MCQ with Answers

80) The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately

1 mm

5 mm

10 mm

30 mm

Answer is:

30 mm

81) The difference of pressure between the inside and outside of a liquid drop is

p = Txr

p = T/r

p = T/2r

p = 2T/r

Answer is:

p = 2T/r

82) If the surface of liquid is convex, men

cohesion pressure is negligible

cohesion pressure is decreased

cohesion pressure is increased

there is no cohesion pressure

Answer is:

cohesion pressure is increased

83) To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than

2.4 m above the hydraulic gradient

6.4 m above the hydraulic gradient

10.0 m above the hydraulic gradient

5.0 above the hydraulic gradient

Answer is:

6.4 m above the hydraulic gradient

Fluid Mechanics MCQ with Answers

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