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MASS TRANSFER

Mass Transfer
In case of constant underflow extraction operation, the __________ at all solute concentration.

Ratio of the insoluble to solution is constant
Solids are drained to the same extent
Both A & B
Neither A nor B

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Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

Unidirectional diffusion from liquid to gas phase
Either A or B
Unidirectional diffusion from gas to liquid phase
A counter diffusion at an almost equal molar rate

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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
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Equal to the dry bulb
Less than the wet bulb
Equal to the wet bulb
More than the wet bulb

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Mass Transfer
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

Dependent on the system; can be either lower or higher than
Same as
Always higher than
Always lower than

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