Mechanical Engineering - Hydraulics and Fluid Mechanics

26. 

Which of the following is an example of laminar flow?

A. Under ground flow
B. Flow past tiny bodies
C. Flow of oil in measuring instruments
D. all of these

Answer: Option D

Explanation:

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27. 

The pressure less than atmospheric pressure is known as

A. suction pressure
B. vacuum pressure
C. negative gauge pressure
D. all of these

Answer: Option D

Explanation:

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28. 

The total energy line lies over the hydraulic gradient line by an amount equal to the

A. pressure head
B. velocity head
C. pressure head + velocity head
D. pressure head - velocity head

Answer: Option B

Explanation:

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29. 

A structure whose width is __________ the width of the channel, is called a flumed structure.

A. less than
B. more than

Answer: Option A

Explanation:

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30. 

The maximum efficiency of transmission through a pipe is

A. 50%
B. 56.7%
C. 66.67%
D. 76.66%

Answer: Option C

Explanation:

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