Chemical Engineering - Mass Transfer

1. 

Which of the following parameters remains constant during chemical dehumidifica-tion?

A. Dry bulb temperature
B. Partial pressure of vapour
C. Wet bulb temperature
D. None of these

Answer: Option A

Explanation:

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2. 

Drying of a solid involves __________ transfer.

A. only heat
B. only mass
C. both heat and mass
D. none of these

Answer: Option C

Explanation:

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3. 

Mechanism of moisture removal in case of freeze drying of food stuff is by

A. evaporation
B. sublimation
C. dehydration
D. adsorption

Answer: Option B

Explanation:

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4. 

The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.

A. composition
B. temperature
C. total pressure
D. all (a), (b) and (c)

Answer: Option B

Explanation:

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5. 

Which is not concerned directly with mass transfer ?

A. Schmidt number
B. Sherwood number
C. Lewis relationship
D. Froude number

Answer: Option D

Explanation:

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