Process Equipment and Plant Design
Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation

Increases economy
Increases capacity
Both B & C
Does not affect the capacity

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.

Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres
Liquor flows inside the tube, while the steam is outside submerging the tube
It is suitable for process, in which the final product is a liquor instead of solid
It is unsuitable for concentrating those liquids, which form a scale or deposit salt

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