# Mechanical Engineering - Hydraulics and Fluid Mechanics

### Exercise :: Hydraulics and Fluid Mechanics - Section 3

6.

The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

 A. B. C. D.

Explanation:

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7.

When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

 A. 0.5 a2gH B. 0.707 a2gH C. 0.855 a2gH D. a2gH

Explanation:

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8.

A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.

 A. Yes B. No

Explanation:

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9.

Water is __________ liquid.

 A. a compressible B. an incompressible

Explanation:

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10.

With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

 A. decrease B. increase C. remain unchanged D. depend upon the characteristics of liquid