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Mass Transfer - Section 1 (2)

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Mass Transfer - Section 1

Mass transfer is a field and if you are interested to test your aptitude level
then you can find the MCQs in this section and can solve them easily.

9. 

The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is

A. natural draft cooling tower
B. induced draft cooling tower
C. spray chamber
D. none of these

Answer: Option C

Explanation:

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10. 

Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?

A. Sieve plate column
B. Bubble cap column
C. Randomly packed column
D. Wetted wall column

Answer: Option D

Explanation:

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11. 

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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12. 

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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13. 

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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14. 

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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15. 

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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16. 

Physical absorption is

A. an irreversible phenomenon.
B. a reversible phenomenon.
C. accompanied by evolution of heat.
D. both (b) and (c)

Answer: Option D

Explanation:

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