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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Fick
Stefan
Danckwerts
Toor and Marchello

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Mass Transfer
Drift in a cooling tower is

All of these
Dependent on the water lost by evaporation
The water entrained by the circulating air
Desirable

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Mass Transfer
An azeotropic mixture is a __________ mixture.

Constant boiling point
Ternary
Binary
None of these

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Mass Transfer
Large scale drying of wheat is done in a __________ dryer.

Vacuum rotary
Fluidised bed
Tray
Spouted bed

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Mass Transfer
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process?

Relative humidity of outlet air
Flow rate of inlet air
Humidity of inlet air
Temperature of the solid

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Mass Transfer
Raoult's law is applicable to the

Mixture of water and alcohol
Ideal solutions
Real solutions
Non-ideal gases

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