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Mass Transfer

Mass Transfer
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

78
100
None of these
50

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Mass Transfer
Can a cooling tower cool water below the wet bulb temperature of inlet air?

Yes ; but the air flow rate should be excessively high
Yes
No
Yes ; but height of cooling tower will be prohibitively high

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Mass Transfer
Stacked packing compared to dumped packing

Gives higher pressure drop
Gives lower pressure drop
Provides poorer contact between the fluids
Both A & B

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Mass Transfer
Unit operation involved in the prilling of urea is

Crystallisation
Drying
Both B and C
Evaporation

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Mass Transfer
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

> 100
100
< 100
None of these

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Mass Transfer
On addition of solute in the solvent, the __________ of the solution decreases.

Vapour pressure
Freezing point
Boiling point
Both B and C

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