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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
What is the reflux ratio at total reflux?

Data insufficient
Infinity
Zero
Unity

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Mass Transfer
Flooding results in

High gas velocity
High tray efficiency
Good contact between the fluids
Low tray efficiency

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Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

0.01
0.1
10-5 to 10-6
> 1

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Mass Transfer
To remove all the moisture from a wet solid it requires exposure to __________ air.

None of these
Highly humid
High temperature
Perfectly dry

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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

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

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