Civil Engineering - Hydraulics

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.

Answer: Option A

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%.

Answer: Option D

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,

Answer: Option A

Explanation:

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34. 

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

A.
B.
C.
D. ρdp + gdz + vdv = 0

Answer: Option C

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.

Answer: Option A

Explanation:

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