CHEMICAL ENGINEERING

Question: For the transfer of solution of thick slurry, the pump used is a __________ pump.
[A].

reciprocating

[B].

gear

[C].

diaphragm

[D].

centrifugal

Answer: Option C

Explanation:

No answer description available for this question.

Question: Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will
[A].

increase

[B].

decrease

[C].

remain same

[D].

be quadrupled

Answer: Option A

Explanation:

No answer description available for this question.

Question: A centrifugal pump used to pump water is used to pump an oil with specific gravity of 0.8 at the same rate. The power consumption will now
[A].

increase

[B].

decrease

[C].

remain same

[D].

data insufficient to predict

Answer: Option B

Explanation:

No answer description available for this question.

Question: Net positive suction head (NPSH) of a centrifugal pump must be
[A].

greater than the vapour pressure of the liquid.

[B].

less than the vapour pressure of the liquid.

[C].

equal to the vapour pressure of the liquid.

[D].

less than barometric pressure.

Answer: Option A

Explanation:

No answer description available for this question.

Question: For the same flow rate of a fluid, the pressure drop is the least for
[A].

venturimeter

[B].

orificemeter

[C].

flow-nozzle

[D].

Δp is same for all

Answer: Option A

Explanation:

No answer description available for this question.

Question: A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is __________ litres.
[A].

600

[B].

660

[C].

1.1

[D].

60

Answer: Option B

Explanation:

No answer description available for this question.

Question: A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is __________ hp.
[A].

1

[B].

10/55

[C].

5.5

[D].

1/55

Answer: Option A

Explanation:

No answer description available for this question.

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.