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Mass Transfer

Mass Transfer
Free flowing granular materials can be best dried in a __________ drier.

Rotary
Freeze
Drun
Cylinder

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Mass Transfer
Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

K ∝ D2
K ∝ √D
K ∝ D1.5
K ∝ D

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Mass Transfer
Alcohol is dehydrated using __________ distillation.

Steam
Molecular
Azeotropic
Extractive

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Mass Transfer
For gas absorption, low viscosity solvents are preferred, because of their

Low pumping pressure drop
All of these
Better flow characteristics
Rapid absorption rates

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Mass Transfer
In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.

Operating
Total
Minimum
Maximum permissible

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Mass Transfer
Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.

Stanton
Peclet
Schmidt
Sherwood

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