Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Decreases
Increases linearly
Increases
Remains same

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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

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

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