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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
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.

Less than
Same as
More than
Very much less

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Mass Transfer
In gas-liquid contact operation, the number of ideal stages, N = (xa - xb)/(xb - x*b) . This is true when the stripping factor 'S' is

S < 1
S = 1
S = ∞
S > 1

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Mass Transfer
CO₂ can be absorbed by

Heated charcoal
Cold Ca(OH)₂
Alumina
Hot cupric oxide

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Mass Transfer
The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature.

Dry bulb
Dew point
None of these
Wet bulb

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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
Remains unaffected
Increases

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