Category: Mass Transfer

A. Size
B. Durability
C. Porosity
D. Cost

A. Centrifugal
B. Packed
C. Plate
D. None of these

A. In case of induced draft cooling tower, the fan is placed at the top of the tower
B. Effectiveness of forced draft cooling tower is reduced by the recirculation of the humid and
hot discharged air
C. A natural draft cooling tower is recommended to be used, when the air humidity is low and air
temperature is also low
D. Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb
temperature

A. Free
B. Equilibrium
C. Unbound
D. Bound

A. Dew point
B. Wet bulb
C. Both A & B
D. Neither A nor B

A. High pressure drop
B. Maldistribution of liquid
C. Non-uniformity of packing
D. Both B. and C.

A. Above which it will always become damp
B. Below which it will always stay dry
C. Both A. and B.
D. Above Which it will always become dry and below which it will always stay damp

A. Liquid stream should be distributed uniformly
B. Gas stream should be distributed uniformly
C. Both gas as well as liquid streams should be distributed uniformly
D. By passing should be completely avoided

A. Dilute solutions, over a small concentration range
B. Gaseous solutions at high pressure
C. Concentrated solutions
D. None of these

A. Liquid-solid
B. Gas-solid
C. Fluid-solid
D. Solid-solid