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Mass Transfer

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

Kissinevskii
Danckwerts
Toor and Marchello
Higbie

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Mass Transfer
For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.

Neither A nor B
Unsaturated surface
Constant rate
Both A & B

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Mass Transfer
Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

> 1
< 1
≤ 1
1

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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
0.215
0.017
0.31

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Mass Transfer
__________ extractor is used for the concentration of radioactive nuclear waste.

Pulsed column
Seive plate
Mixer-settler
None of the listed here

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Mass Transfer
Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid )

P
P = P
P < P
P >>P

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