Mass Transfer
A slurry is to be dried to produce flaky solid. Which dryer would you recommend?

Rotary dryer
Dielectric dryer
Drum dryer
Spray dryer

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Mass Transfer
Inside the distillation column, the

Liquids are not always at their bubble points
Driving force for the vapour flow is the pressure drop
None of these
Pressure increases gradually from bottom to the top of the column

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