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Mass Transfer

Mass Transfer
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

70-80
90-100
30-40
44119

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Mass Transfer
Which of the following is used for the concentration of rubber latex?

Long tube vertical evaporator
Agitated film evaporator
Calendria
Short tube evaporator

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

Hundred
Zero
Both zero and hundred
None of these

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

All of the listed here
High labour cost & low heat economy
Non-uniform & low production rate
High maintenance cost

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Mass Transfer
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

Lowering the total pressure
Both A & B
Raising the temperature
Neither A nor B

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

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

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