Mechanical Engineering - Hydraulics and Fluid Mechanics

41. 

When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure

A. varies as the square of the radial distance
B. increases linearly as its radial distance
C. increases as the square of the radial distance
D. decreases as the square of the radial distance

Answer: Option A

Explanation:

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42. 

The specific weight of compressible fluids does not remain constant.

A. True
B. False

Answer: Option A

Explanation:

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43. 

The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

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

Answer: Option D

Explanation:

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44. 

In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere.

A. True
B. False

Answer: Option A

Explanation:

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45. 

Newton's law of viscosity is a relationship between

A. pressure, velocity and temperature
B. shear stress and rate of shear strain
C. shear stress and velocity
D. rate of shear strain and temperature

Answer: Option B

Explanation:

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