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Mass Transfer

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

100
78
50
None of these

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

-25
> 25
< 25
25

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Mass Transfer
The expression, y(1 - x)/x(1 - y) is for

Absorption factor
Selectivity
Murphree efficiency
Relative volatility

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Increases
Decreases
Remains unchanged
Depends on the pressure of the system

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Decreases
Decreases linearly
Increases
Remains unaffected

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Mass Transfer
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the

Pressure rises
Temperature falls
Temperature rises
Pressure falls

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