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Question: For very low pressure and high discharge rate, the compressor used is a/an __________ compressor.
[A].

axial

[B].

reciprocating

[C].

rotary

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.
[A].

17

[B].

42

[C].

84

[D].

1.8

Answer: Option A

Explanation:

No answer description available for this question.

Question: For pumping slurry, one can use a __________ pump.
[A].

reciprocating

[B].

diaphargm

[C].

centrifugal

[D].

pneumatic

Answer: Option B

Explanation:

No answer description available for this question.

Question: In turbulent flow, the
[A].

fluid particles move in an orderly manner.

[B].

momentum transfer is on molecular scale only.

[C].

shear stress is caused more effectively by cohesion than momentum transfer.

[D].

shear stresses are generally larger than in a similar laminar flow.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Multistage compressors are used in industry, because they
[A].

reduce the cost of compressor.

[B].

reduce the size requirement,

[C].

resemble closely to isothermal compression.

[D].

are easy to control.

Answer: Option C

Explanation:

No answer description available for this question.

Question: A fluidis moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.
[A].

7

[B].

700

[C].

7000

[D].

630

Answer: Option A

Explanation:

No answer description available for this question.

Question: Creeping flow around a sphere is defined, when particle Reynolds number is
[A].

< 2100

[B].

< 0.1

[C].

> 2.5

[D].

< 500

Answer: Option B

Explanation:

No answer description available for this question.

Question: Equivalent length of a pipe fitting is
[A].

dependent on Reynolds number.

[B].

independent of Reynolds number.

[C].

dependent on the length of the pipe.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: At a constant speed of the centrifugal pump . it __________ the impeller diameter.
[A].

capacity varies directly with

[B].

head varies as the square of

[C].

horsepower varies as the cube of

[D].

all (a), (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.