Chemical Engineering - Mass Transfer

1. 

In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency

A. liquid stream should be distributed uniformly.
B. gas stream should be distributed uniformly.
C. both gas as well as liquid streams should be distributed uniformly.
D. by passing should be completely avoided.

Answer: Option C

Explanation:

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2. 

Reverse osmosis is also called

A. dialysis
B. electrodilysis
C. diffusion
D. ultrafiltration.

Answer: Option D

Explanation:

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3. 

Which of the following is not a batch drier?

A. Truck drier
B. Agitated pan drier
C. Fluidised bed drier
D. Vacuum shelf drier

Answer: Option C

Explanation:

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4. 

Steam distillation is not recommended to be used, if the

A. azeotropic mixture is to be separated and the final product is miscible with water.
B. liquids decompose, if distilled directly at atmospheric pressure.
C. material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature.
D. material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature.

Answer: Option A

Explanation:

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5. 

Rayleigh equation applies to __________ distillation.

A. differential
B. flash
C. equilibrium
D. molecular

Answer: Option A

Explanation:

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