Mechanical Engineering - Hydraulics and Fluid Mechanics

21. 

The total pressure on the top of a closed cylindrical vessel competely filled up with a liquid is

A. directly proportional to (radius)2
B. inversely proportional to (radius)2
C. directly proportional to (radius)4
D. inversely proportional to (radius)4

Answer: Option C

Explanation:

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22. 

Poise is the unit of viscosity in C.G.S. system of units.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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23. 

The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

A. 0.34 times
B. 0.67 times
C. 0.81 times
D. 0.95 times

Answer: Option D

Explanation:

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24. 

When the Mach number is more than 6, the flow is called

A. sub-sonic flow
B. sonic flow
C. super-sonic flow
D. hyper-sonic flow

Answer: Option D

Explanation:

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25. 

The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

A. equal to
B. one-half
C. three fourth
D. double

Answer: Option D

Explanation:

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