Mass Transfer
The cooling effect in a cooling tower can not be increased by

Lowering the barometric pressure
Reducing the humidity of entering air
Increasing the air velocity over the wet surfaces
None of these

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Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

The fraction vaporised but not the product composition
The product composition but not the fraction vaporised
Neither the product composition nor the fraction vaporised
The product composition as well as the fraction vaporised

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

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

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