1.
HETP is numerically equal to HTU, only when the operating line

2.
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid)

3.
The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

5.
In case of constant underflow extraction operation, the __________ at all solute concentration.

6.
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

8.
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

9.
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

10.
Pick out the correct statement.

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