Mass Transfer
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

Both A & B
Neither A nor B
Lowering the total pressure
Raising the temperature

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Mass Transfer
Flights in a rotary dryer are provided to

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

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Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Solubility of the components of air in water is very small
Lewis number is close to unity
They are always equal under all circumstances
Water has a high latent heat of evaporation

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