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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Fick
Stefan
Toor and Marchello
Danckwerts

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Mass Transfer
Paper industry employs __________ driers.

Spray
Rotary
Fluidised bed
Cylinder

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Mass Transfer
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

0.31
0.107
0.017
0.215

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Mass Transfer
Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature.

Dry-bulb
Dew point
Wet-bulb
Adiabatic saturation

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Mass Transfer
The most efficient cooling tower out of the following is

Atmospheric
Forced draft
Natural draft
Induced draft

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Mass Transfer
Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

All of these
Large minimum liquid to gas (L/G) ratio
Decreased solute solubility
Large number of trays

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