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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.

90-100
44119
30-40
70-80

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Mass Transfer
In extractive distillation, solvent is

Of high viscosity to give high tray efficiency
Added to alter the relative volatility of the mixture
Of high volatility
Present in overhead stream

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Mass Transfer
Surface renewal model of mass transfer was enunciated by

Danckwerts
Fick
Toor and Marchello
Stefan

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Mass Transfer
Humid volume, at a given temperature is a/an __________ function of humidity.

Logarithmic
Inverse
Exponential
Linear

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

1
?
None of these

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Mass Transfer
Minimum reflux ratio in a distillation column results in

Minimum number of trays
Minimum reboiler size
Optimum number of trays
Maximum condenser size

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