# Mechanical Engineering - Hydraulics and Fluid Mechanics

### Exercise :: Hydraulics and Fluid Mechanics - Section 6

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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