Category: Mass Transfer

A. Small sizes
B. Multi-component distillation
C. High pressure operation
D. Vacuum distillation

A. When the concentration difference for the mass transfer becomes zero at the bottom of the gas
absorption tower, then the upper end of the operating line touches the equilibrium curve
B. The average distance between the operating line and equilibrium line is large, when the liquidgas
ratio is also large in case of a counter current gas absorption tower
C. The operating line lies above the equilibrium curve in case of a gas desorber
D. With decrease in the liquid flow rate for a fixed gas flow rate, the slope of the operating line
decreases, in case of gas absorption process

A. Operating line always lies above the equilibrium curve
B. Operating line always lies below the equilibrium curve
C. Temperature remains unaffected
D. Temperature always increases

A. At ground level
B. 2 metres above the ground
C. 5 metres above ground
D. 10 metres above ground

A. Diffusion
B. Heat transfer
C. Both A. and B.
D. Neither A. nor B.

A. Fixed bed absorption
B. Moving bed absorption
C. Fixed bed adsorption
D. Moving bed adsorption

A. (1 – f)/f
B. – (f – 1)/f
C. -1/f
D. -f/(1 – f)

A. Flooding
B. Gas viscosity
C. Liquid density
D. Liquid hold up

A. Incurs smaller pressure drop
B. Allows installation of cooling coils
C. Is less costly when built in large sizes/diameters
D. Is more suitable, if suspended solids are present in fluid streams

A. √T
B. T
C. T2
D. T3