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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
Critical humidity of a solid salt means the humidity

Above Which it will always become dry and below which it will always stay damp
Above which it will always become damp
Both A and B
Below which it will always stay dry

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Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

95
90
91.5
99

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Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

Humidified with wet bulb temperature decreasing
Humidified at constant wet bulb temperature
None of these
Dehumidified

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Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

1
< 1
> 1

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

D ∝ T
D ∝ T0.5
D ∝ T1.5
D ∝ T2

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