In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to _____________ times that in a single effect?
Correct answer: B. (1/n)th
- A. nth
- B. (1/n)th
- C. 0.5 nth
- D. 1.5 nth
Explanation
For a fixed total heating surface, adding effects divides the available surface among the effects, so evaporation per unit surface is approximately 1/n of that in a single effect. The main advantage of multiple effects is greater steam economy, not greater evaporation per unit area.
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