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Mass Transfer

Mass Transfer
A good solvent used for absorption should not have very high

Vapor pressure
All of these
Viscosity
Freezing point

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Mass Transfer
The critical moisture content in case of drying indicates the __________ rate period.

Beginning of falling
None of these
End of falling
Beginning of constant

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Mass Transfer
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

Durability
Size
Porosity
Cost

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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 ∝ T
D ∝ T1.5
D ∝ T2

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Mass Transfer
NSc/NPr is called the

Sherwood number
Psychrometric ratio
Lewis number
Stantan number

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Mass Transfer
Make up water is supplied during cooling tower operation to compensate for water losses due to

Evaporation
Blowdown
All of these
Entrainment

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