Chemical Engineering - Mass Transfer

26. 

The relative saturation of an unsaturated mixture of gas and vapor is independent of the

A. nature of the vapor.
B. temperature of the mixture.
C. composition of the mixture.
D. none of these.

Answer: Option D

Explanation:

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27. 

The adiabatic saturation curve for a vapour-gas mixture is

A. straight line.
B. slightly concave upward.
C. slightly concave downward.
D. none of these.

Answer: Option B

Explanation:

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28. 

Pick out the wrong statement.

A. Cellulose acetate membranes are used in dialysis process.
B. Elutriation process refers to when the soluble material is largely concentrated on the surface of an insoluble solid and is simply washed off by the solvent.
C. 'Cascade' means a group of stages interconnected so that various streams flow from one to another.
D. Zirconia probe is used for the humidity measurement.

Answer: Option D

Explanation:

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29. 

The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases 'A' and 'B' is

A. 1
B.
C. 0.5
D. 2

Answer: Option B

Explanation:

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30. 

Drift in a cooling tower is

A. the water entrained by the circulating air.
B. dependent on the water lost by evaporation.
C. desirable.
D. all (a), (b) & (c).

Answer: Option A

Explanation:

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