Mass Transfer
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will

Decrease
Data insufficient, can't be predicted
Increase
Remain same

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Mass Transfer
Flights in a rotary dryer are provided to

Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
None of these
Reduce the residence time of solid
Increase the residence time of the solid

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