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Mass Transfer

Mass Transfer
Rotary dryers cannot handle __________ materials.

Grannular
Dry
Free flowing
Sticky

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Mass Transfer
Cox chart is useful in the design of

Evaporator
Dryer
Crystalliser
Distillation column

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Film
Surface renewal
None of these
Penetration

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Mass Transfer
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.

12
8
6
10

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Mass Transfer
Minimum possible diameter of a packed coloumn is decided mainly by the

Gas viscosity
Flooding
Liquid density
Liquid hold up

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Mass Transfer
Desulphurisation of petrol is done in a

Packed extraction column
Plate type extraction column
Rotating disc extractor
Bollman extractor

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