Mechanical Engineering - Hydraulics and Fluid Mechanics

26. 

The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

A. 2gH
B. H2g
C. 2gH
D. 2gH

Answer: Option D

Explanation:

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27. 

According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

A. equal to
B. directly proportional
C. inversely proportional

Answer: Option B

Explanation:

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28. 

The force per unit length is the unit of

A. surface tension
B. compressibility
C. capillarity
D. viscosity

Answer: Option A

Explanation:

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29. 

The shear stress-strain graph for a non-newtonian fluid is a curve.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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30. 

The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.

A. equal
B. directly proportional
C. inversely proportional

Answer: Option B

Explanation:

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