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Mass Transfer

Mass Transfer
NSc/NPr is called the

Sherwood number
Psychrometric ratio
Stantan number
Lewis number

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Mass Transfer
What is the reflux ratio at total reflux?

Zero
Data insufficient
Infinity
Unity

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Mass Transfer
Air at a particular humidity is heated in a furnace. The new dew point

Increases
Remain unchanged
Depends on the extent of heating
Decreases

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Mass Transfer
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement.

Marginal decrease in the number of
Major decrease in the number of
None of the listed here
No change in theoretical

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Mass Transfer
Critical humidity of a solid salt means the humidity

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

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Mass Transfer
In distillation, overhead product contains

Only one component
Any number of components
Two components
Only saturated liquid

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