Mass Transfer
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

Humid heat
Specific heat
Sensible heat
Latent heat

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Mass Transfer
Flights in a rotary dryer are provided to

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

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