Chemical Engineering - Fluid Mechanics

6. 

Which of the following can be used for the direct measurement of volumetric flow rate of slurry ?

A. Venturimeter
B. Orificemeter
C. Rotameter
D. Pitot tube

Answer: Option C

Explanation:

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7. 

A pipe is defined as 'hydraulically smooth', if the friction factor

A. is not a function of Reynolds number.
B. for a given Reynolds number remains constant even on further smoothening of the pipe.
C. is zero irrespective of the Reynolds number.
D. none of these.

Answer: Option B

Explanation:

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8. 

A Pitot tube indicates 5 cm of water (manometer) when it is being used for measuring velocity of air. The velocity of air in m/sec is

A. 5
B. 14.1
C. 56.22
D. 28.2

Answer: Option D

Explanation:

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9. 

Delivery of insufficient quantity of liquid by a pump may be caused by

A. air leak in the inlet
B. low rpm
C. too high a lift
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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10. 

Fluid resistance to shear depends upon its

A. rate of transfer of molecular momentum.
B. cohesion.
C. both (a) and (b).
D. neither (a) nor (b).

Answer: Option C

Explanation:

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