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Mass Transfer

Mass Transfer
Sticky material can be dried in a __________ dryer.

Fluidised bed
Rotary
None of these
Tray

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Mass Transfer
The Hatta number is important in

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

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Mass Transfer
At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent.

50
100
Between 0 and 100

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Mass Transfer
Milk is dried usually in a __________ dryer.

Spray
Tray
Rotary
Freeze

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

D ∝ T0.5
D ∝ T2
D ∝ T
D ∝ T1.5

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Mass Transfer
Drift in a cooling tower is

All of these
Desirable
Dependent on the water lost by evaporation
The water entrained by the circulating air

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