Mass Transfer
Plate efficiency

Increases due to foaming
Increases due to liquid entrainment
Increases due to weeping and dumping of liquid
Is a function of the mass transfer between liquid and vapour

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Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Dehumidification with dry bulb temperature remaining constant
Heating and dehumidification at almost constant wet bulb temperature
None of these
Cooling and dehumidification

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Mass Transfer
The wetted wall tower is used to determine

M.T.C. of liquid in liquid-gas system
M.T.C. of individual components in a liquid-liquid system
Individual mass transfer co-efficient (M.T.C.) in gaseous system
The overall M.T.C. of the system

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Mass Transfer
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Viscosity variation of the fluids may cause channeling/flooding
Packing may be crushed due to thermal expansion/contraction of the components of the equipments
None of these
Pressure drop in the equipment will be very high

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