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Mass Transfer

Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

0.01
0.1
10-5 to 10-6
> 1

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Mass Transfer
The vapour pressure exerted by the moisture contained in a wet solid depends upon the

Nature of the moisture
Temperature
All of these
Nature of the solid

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Mass Transfer
Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the __________ number.

Stanton
Sherwood
Peclet
Schmidt

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Mass Transfer
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

None of these
?
1

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Mass Transfer
Packed column distillation is limited to the column __________ metres.

Diameter < 0.6
Both A & B
Height < 6
Neither A nor B

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Mass Transfer
When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

Forced
None of these
Natural
Induced

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