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Mass Transfer

Mass Transfer
Penetration model (theory) for mass transfer was enunciated by

Danckwerts
Toor and Marchello
Higbie
Kissinevskii

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Mass Transfer
The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

Falling film
Short tube
Vacuum
Long tube

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Mass Transfer
At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbant

Increases
Decreases
Remains unchanged
Increases exponentially

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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
Wet-bulb
Dew point
Adiabatic saturation

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Mass Transfer
During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.

Partial pressure of water vapor
Wet bulb temperature
None of these
Relative humidity

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Mass Transfer
In distillation, overhead product contains

Only saturated liquid
Any number of components
Two components
Only one component

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