Mass Transfer
In the constant rate period of the rate of drying curve for batch drying,

None of these
Rate of drying decreases abruptly
Surface evaporation of unbound moisture occurs
Cracks develop on the surface of the solid

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Mass Transfer
Humid volume is the total volume in m³ of 1 kg of

Gas plus its accompanying vapour at 1 atm. and room temperature
Vapour laden gas at 1 atm. and gas temperature
Vapour laden gas at 1 atm. and room temperature
Gas plus its accompanying vapour at 1 atm. and gas temperature

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Mass Transfer
In saturated gas, the

Vapour is in equilibrium with the liquid at the room temperature
Vapour is in equilibrium with the liquid at the gas temperature
None of the listed here
Partial pressure of vapour equals the vapour pressure of the liquid at room temperature

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