Mass Transfer
Which of the following plays an important role in problems of simultaneous heat and mass transfer?

Sherwood number
Lewis number
Prandtl number
Schmidt number

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Mass Transfer
In case of a desorber (stripper), the

Temperature always increases
Operating line always lies above the equilibrium curve
Operating line always lies below the equilibrium curve
Temperature remains unaffected

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Mass Transfer
Steam distillation is not recommended to be used, if the

Liquids decompose, if distilled directly at atmospheric pressure
Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature
Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature
Azeotropic mixture is to be separated and the final product is miscible with water

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