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Mass Transfer

Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

(X - 1)/X
(X + 1)/X
X/(X - 1)
X/(X + 1)

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Mass Transfer
For the same process conditions, the reflux ratio of an unlagged distillation column

Increases in summer
None of these
Decreases in winter
Increases in winter

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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.

None of these
Dry bulb
Wet bulb
Dew point

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Mass Transfer
L/mG is the expression for

Slope of operating line in stripper
Brinkman number
Slope of operating line in absorber
Absorption factor

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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
When the feed to a distillation column is a saturated liquid, slope of the feed line is

Zero
Unity
None of these
Infinity

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