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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
Selectivity of the solvent used in solvent extraction should be

1
< 1
> 1

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

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

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Mass Transfer
The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

√T
T
T3
T1.5

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Mass Transfer
Minimum reflux ratio in a distillation column results in

Optimum number of trays
Minimum reboiler size
Maximum condenser size
Minimum number of trays

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Mass Transfer
Desulphurisation of petrol is done in a

Bollman extractor
Packed extraction column
Rotating disc extractor
Plate type extraction column

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