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Fluid Mechanics - Section 1 (4)

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Fluid Mechanics - Section 1

There are many problems and MCQs available on Fluid mechanics which
you can solve easily to test your aptitude in fluid mechanic field.

25. 

A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity

A. same as that of A.
B. one fourth as that of A.
C. twice as that of A.
D. four times as that of A.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

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26. 

The dimension of dynamic viscosity is

A. ML-1T-1
B. L2T-1
C. LT-2
D. ML-1T-2

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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27. 

What is the normal range of exit cone angle of a venturimeter ?

A. 2 to 5
B. 7 to 15
C. 15 to 25
D. >25

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

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28. 

The terminal velocity of a particle moving through a fluid varies as dpn. What is the value of n' for Newton's law regime ?

A. 0.5
B. 1
C. 1.5
D. 3

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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29. 

Power loss in an orificemeter is __________ that in a venturimeter.

A. less than
B. same as
C. more than
D. data insufficient, cannot be predicted

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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30. 

At high Reynolds number

A. inertial forces control and viscous forces are unimportant.
B. viscous forces predominate.
C. inertial forces are unimportant and viscous forces control.
D. none of these.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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31. 

Foot valves provided in pumps are __________ valves.

A. relief
B. three/four way
C. pressure reducing
D. directional control

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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32. 

If the discharge of a centrifugal pump is throttled, then its suction lift

A. increases
B. decreases
C. remains unchanged
D. data insufficient to predict

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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