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Mass Transfer

Mass Transfer
When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal.

> 1
1
< 1
?

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Mass Transfer
Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.

Does not affect
Decreases
Exponentially increases
Increases

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Mass Transfer
If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

G/L
Always < 1
L/G
None of these

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Mass Transfer
Solvent used in extractive distillation

Is of low volatility
Forms a high boiling azeotrope
Forms a low boiling azeotrope
Does not alter the relative volatility of the original components

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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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Mass Transfer
Which of the following remains constant during sensible cooling process ?

Specific humidity & Partial pressure of vapour
None of the listed here
Partial pressure of vapour
Specific humidity

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