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Mass Transfer

Mass Transfer
Sand is dried in foundaries in a___drier.

Vacuum
Spray
Fluidisedbed
Rotary

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB0.5, according to __________ theory.

Penetration
Surface renewal
None of these
Film

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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.

10
12
6
8

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Mass Transfer
Water entrained by circulating air in cooling towers is termed as

Drift
Blow down
None of the listed here
Vapor load

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Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

2
4
3
1

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Mass Transfer
Low viscosity absorbent is preferred for reasons of

Improved flooding characteristics
Rapid absorption rates and good heat transfer characteristics
Low pressure drop on pumping
All of these

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