# Civil Engineering - Hydraulics

### Exercise :: Hydraulics - Section 1

31.

A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is

 A. 2/g m of water B. g/2 m of water C. 1g m of water D. g m of water.

Explanation:

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32.

Maximum efficiency of transmission of power through a pipe, is

 A. 25% B. 33.3% C. 50% D. 66.67%.

Explanation:

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33.

An ideal flow of a liquid obeys

 A. Continuity equation B. Newton's law of viscosity C. Newton's second law of motion D. dynamic viscosity law,

Explanation:

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34.

Euler's equation for motion of liquids, is given by

 A. B. C. D. ρdp + gdz + vdv = 0

Explanation:

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35.

Reynold number is the ratio of initial force and

 A. viscosity B. elasticity C. gravitational force D. surface tension.