Chemical Engineering - Fluid Mechanics

11. 

A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump

A. develops a lower head.
B. capacity is reduced.
C. requires more power.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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12. 

In an incompressible flow of fluid, the fluid

A. temperature remains constant.
B. compressibility is greater than zero.
C. density does not change with pressure & temperature.
D. is frictionless.

Answer: Option C

Explanation:

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13. 

The ratio of maximum to average velocity in case of streamline flow between parallel plates is

A. 1
B. 1.5
C. 2
D. 2.5

Answer: Option B

Explanation:

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14. 

A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape.

A. circular
B. rectangular
C. triangular
D. trapezoidal

Answer: Option A

Explanation:

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15. 

Pressure co-efficient is the ratio of pressure forces to __________ forces.

A. gravity
B. inertial
C. viscous
D. none of these

Answer: Option B

Explanation:

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