Mass Transfer
For the flow of gases through a capillary, with increase in temperature, the permeability __________ as per Knudsen law.

Remains same
Either A or B; depends on the gas
Increases
Decreases

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Mass Transfer
The term "approach" in a cooling tower refers to the difference in the temperature of the

Cold water leaving the tower and the wet bulb temperature of the surrounding air
Hot water entering the tower and the wet bulb temperature of the surrounding air
None of these
Hot water entering and the cooled water leaving the cooling tower

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Mass Transfer
Pick out the wrong statement pertaining to leaching.

Fine solids can not be leached in a Pachuka tank
Door classifier can be used for leaching of coarse solids
Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
Very high temperature is not needed for the leaching of sugar beet

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