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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

0.5
> 1
1
< 1

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Mass Transfer
Which of the following provides maximum contact surface for a liquid-vapour system?

Wetted wall column
Seive-plate column
Bubble-cap plate column
Packed tower

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Mass Transfer
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is

Non-ideal in nature
At a fixed temperature
Soluble in the liquid
Insoluble in the liquid

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Mass Transfer
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for

Constant molal overflow
Constant relative volatility
Total reflux
All of these

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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.

Adiabatic saturation
Wet-bulb
Dew point
Dry-bulb

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Mass Transfer
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

None of these
Spray
Indirect tray
Freeze

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