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Mass Transfer

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

Fluidised bed
Spouted bed
Tray
Vacuum rotary

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Mass Transfer
In McCabe-Thiele method, at infinite reflux ratio

Both the operating lines coincide with diagonal
The overhead product is minimum
Both A & B
Neither A nor B

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Mass Transfer
The humid volume may be increased by increasing the

Both A & B
Temperature at constant humidity
Neither A nor B
Humidity at constant temperature

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Mass Transfer
In physical terms, Schmidt number means

Momentum diffusivity/mass diffusivity
Thermal diffusivity/mass diffusivity
Thermal diffusivity/momentum diffusivity
Mass diffusivity/thermal diffusivity

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Mass Transfer
The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

Falling film
Short tube
Vacuum
Long tube

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Mass Transfer
Can the efficiency of a plate in the distillation tower be greater than 100%?

Normally not; but is possible if infinite number of plates are put
Yes
Never
Yes ; if the reflux ratio is maximum

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