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Mass Transfer

Mass Transfer
Mechanism of moisture removal in case of freeze drying of food stuff is by

Adsorption
Evaporation
Dehydration
Sublimation

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Mass Transfer
Molecular diffusivity of a liquid

Increases with temperature
May increase or decrease with temperature
Decreases with temperature
Is independent of temperature

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Mass Transfer
Leaching rate is independent of the

Particle size
Temperature
Agitation
None of the listed here

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Mass Transfer
As per Gilliland's equation, the diffusivity is

Inversely proportional to 'P'
All of these
Directly proportional to 'T1.5'
Dependent on the molecular volume & molecular weight of components

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Mass Transfer
The unit of volumetric diffusivity is

Cm³/sec
Cm²/sec
Cm/sec
Cm²/seC₂

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

Less than the wet bulb
Equal to the wet bulb
Equal to the dry bulb
More than the wet bulb

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