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Mass Transfer

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

Drun
Freeze
Rotary
Cylinder

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Mass Transfer
Which of the following is an undesirable characteristic for the solvent used in gas absorption?

High gas solubility
None of these
Low viscosity
Low vapor pressure

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Mass Transfer
Drying operation under vacuum is carried out to

Reduce drying temperature
Dry those materials which have very high unbound mositure content
Dry materials having high bound moisture content
Increase drying temperature

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Mass Transfer
The vapour pressure exerted by the moisture contained in a wet solid depends upon the

Temperature
Nature of the solid
All of these
Nature of the moisture

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

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

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Mass Transfer
Chemisorption compared to physical absorption has

Lower capacity of the solvent for the solute gas
None of these
Lower adsorption rate
Increased utilisation of stagnant zones of the liquid phase

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