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Mass Transfer

Mass Transfer
If f = moles of vapour present per mole of feed, then the slope of feed line is

(1 - f)/f
- f/(1 - f)
- 1/f
- (f - 1)/f

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Mass Transfer
The percentage humidity is less than the relative humidity only at __________ percent humidity.

Hundred
Both zero and hundred
None of these
Zero

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Mass Transfer
As the reflux ratio increases, the slope of the operating line for rectifying section

Remains constant
Decreases
Increases
Data insufficient, cannot be predicted

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Mass Transfer
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

None of these
?
1

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Mass Transfer
Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

D0.5
1/D
D
D1.5

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Mass Transfer
Which of the following parameters remains constant during chemical dehumidifica-tion?

Dry bulb temperature
Wet bulb temperature
None of these
Partial pressure of vapour

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