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Mass Transfer

Mass Transfer
For continuous drying of grannular or crystalline material, the dryer used is the __________ dryer.

Rotary
None of these
Tunnel
Tray

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Mass Transfer
Physical absorption is

A reversible phenomenon
An irreversible phenomenon
Both B & C
Accompanied by evolution of heat

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Mass Transfer
At a fixed total pressure, humidity depends only on the

Density of the vapour
None of these
Heat capacity of the vapour
Partial pressure of vapour in the mixture

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Mass Transfer
Percentage saturation is __________ the relative saturation.

Not related to
Always greater than
Always smaller than
None of these

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Mass Transfer
In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as

Ri = Re/(1 - Re)
Ri = Re
Ri = (1 - Re)/Re
Ri = Re/(1 + Re)

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Mass Transfer
Which of the following is used for the concentration of rubber latex?

Agitated film evaporator
Short tube evaporator
Calendria
Long tube vertical evaporator

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