Chemical Engineering - Mass Transfer

21. 

Relative humidity is the ratio of the

A. partial pressure of the vapour to the vapour pressure of the liquid at room temperature.
B. partial pressure of the vapour to the vapour pressure of the liquid at gas temperature.
C. actual humidity to saturation humidity.
D. none of these

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

22. 

In batch distillation with constant reflux, overhead product composition __________ with time.

A. increases
B. decreases
C. does not vary
D. may increase on decrease, depends on the system.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

23. 

Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

A. electrical resistance
B. thermal conductivity
C. strength
D. none of these.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

24. 

Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

A. latent heat
B. humid heat
C. specific heat
D. sensible heat

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

25. 

To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

A. increase both 'G' and 'S'.
B. decrease both 'G' and 'S'.
C. increase 'S' and decrease 'G'.
D. increase 'G' and decrease 'S'

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.