Chemical Engineering - Fluid Mechanics

1. 

The distance between metacentre and __________ is called metacentric height.

A. water surface
B. centre of gravity
C. centre of buoyancy
D. none of these

Answer: Option B

Explanation:

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2. 

Check valve is used for __________ flow.

A. very precise control of
B. unidirectional
C. multidirectional
D. none of these

Answer: Option B

Explanation:

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3. 

Capacity of a rotary gear pump can be varied by

A. changing the speed of rotation.
B. bleeding air into suction.
C. bypassing liquid from the suction or discharge line.
D. all (a), (6) and (c).

Answer: Option D

Explanation:

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4. 

For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.

A. brings about no further reduction of
B. increases
C. decreases
D. none of these

Answer: Option A

Explanation:

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5. 

Power number is the ratio of

A. drag stress to inertial stress.
B. inertial stress to drag stress.
C. inertial stress to gravitational stress.
D. gravitational stress to drag stress.

Answer: Option A

Explanation:

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