Chemical Engineering - Mass Transfer

36. 

Make up water is required in a cooling tower to replace the water lost by

A. evaporation
B. drift
C. blowdown and leakage
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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37. 

Which of the following quantities need not be fixed before starting the design of a co-current absorber ?

A. Heat gain or loss
B. Flow rate of entering liquid
C. Flow rate of gas
D. None of these

Answer: Option B

Explanation:

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38. 

Mass transfer co-efficient of liquid is

A. affected more by temperature than that for gases.
B. affected much less by temperature than that for gases.
C. not affected by the temperature.
D. none of these.

Answer: Option A

Explanation:

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39. 

Absorption accompanied with chemical reaction is exemplified by the absorption of

A. ammonia in water.
B. benzol present in coke oven gas by wash oil.
C. SO2 in alkaline solution.
D. all (a), (b) and (c).

Answer: Option C

Explanation:

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40. 

Which of the following unit operations makes use of Thiele-Geddes equation ?

A. Liquid-liquid extraction
B. Solid-liquid extraction
C. Multicomponent absorption with chemical reaction
D. Multicomponent distillation.

Answer: Option D

Explanation:

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