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Mass Transfer

Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Critical
Equilibrium
Unbound
Bound

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Mass Transfer
The relative volatility of a binary mixture at the azeotropic composition is

1
∞
> 1

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Mass Transfer
Critical humidity of a solid salt means the humidity

Above Which it will always become dry and below which it will always stay damp
Both A and B
Below which it will always stay dry
Above which it will always become damp

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Mass Transfer
Boiling point diagram is

A plot of temperature vs. liquid composition
Affected by pressure
Not affected by pressure
A plot of temperature vs. vapour composition

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Mass Transfer
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

-ve
∞
+ve

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

Non-uniform & low production rate
All of the listed here
High maintenance cost
High labour cost & low heat economy

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