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Mass Transfer

Mass Transfer
In paper industry, paper is dried in a __________ dryer.

Festoon
Conveyor
Heated cylinder
Tunnel

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Mass Transfer
Separation of two or more components of a liquid solution can not be achieved by

Absorption
Evaporation
Fractional crystallisation
Liquid extraction

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Mass Transfer
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of H₂/ky.Cz is around

1
0.6
0.72
0.24

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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

0.107
0.31
0.017
0.215

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Mass Transfer
Mechanism of moisture removal in case of freeze drying of food stuff is by

Evaporation
Sublimation
Adsorption
Dehydration

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Mass Transfer
The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient)

KL².DA
√(KL².DA)
KL²/DA
KL/DA²

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