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Mass Transfer

Mass Transfer
Large scale drying of sugar is done in a __________ dryer.

Rotary
Tray
Truck
Spouted bed

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Mass Transfer
The Hatta number is important in

Binary distillation
Gas absorption with chemical reaction
Multicomponent distillation
Gas absorption without chemical reaction

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Mass Transfer
Can a cooling tower cool water below the wet bulb temperature of inlet air?

No
Yes ; but the air flow rate should be excessively high
Yes
Yes ; but height of cooling tower will be prohibitively high

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Mass Transfer
Danckwerts developed the __________ theory.

Surface renewal
Film
Penetration
None of these

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Mass Transfer
In distillation columns, the number of bubble caps per tray primarily depends upon the

Allowable gas velocity
Allowable gas and liquid velocities
Allowable liquid velocity
Feed composition

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Mass Transfer
In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit)

Neither A nor B
Parallel
Straight
Both A & B

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