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Mass Transfer

Mass Transfer
Sand is dried in foundaries in a___drier.

Vacuum
Fluidisedbed
Spray
Rotary

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Mass Transfer
With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas

Decreases
Remains same
Decreases linearly
Increases

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Mass Transfer
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement.

Major decrease in the number of
No change in theoretical
None of the listed here
Marginal decrease in the number of

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Mass Transfer
Which of the following is used for the concentration of rubber latex?

Agitated film evaporator
Long tube vertical evaporator
Calendria
Short tube evaporator

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Increases
Decreases
Remains unaffected
Decreases linearly

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Mass Transfer
The most economical range of absorption factor is

5 to 10
2 to 2.5
2.5 to 3
1.25 to 2

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