Chemical Engineering:: Mass Transfer

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.

Physical absorption is

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

A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternery system containing twopairs of partially miscible liquids ?

A. 0
B. 1
C 2
D. 3

Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve)

A. S2/S1
B. S1/S2
C S1 - S2
D. S1 x S2

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)

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