Chemical Engineering - Fluid Mechanics

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Exercise

"You cannot shake hands with a clenched fist."

- Indira Gandhi

11.

With increase in pump speed, its NPSH requirement

A.	decreases
B.	increases
C.	remains unaltered
D.	can either increase or decrease ; depends on other factors

12.

In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ thefluid viscosity.

A.	directly proportional to
B.	inversely proportional to
C.	inversely proportional to the square root of
D.	independent of

13.

Gear pump

A.	is a positive displacement pump.
B.	is a centrifugal pump.
C.	is a non-positive displacement pump.
D.	can be started with delivery valve closed.

14.

Most of the centrifugal pumps used in chemical plants are usually __________ driven.

A.	steam
B.	diesel engine
C.	electric motor
D.	gas turbine

15.

Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the

A.	back flow of fluid in the event of stoppage of pump.
B.	discharge pressure.
C.	flow of liquid during operation of the pump.
D.	all (a), (b) and (c).