The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?

Question

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Evaporators operate under vacuum

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Solution has an elevation of boiling point

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Evaporators operate at atmospheric pressure

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None of these

1.	The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?
A.	Solution has an elevation of boiling point
B.	Evaporators operate under vacuum
C.	Evaporators operate at atmospheric pressure
D.	None of these
Answer» B. Evaporators operate under vacuum

The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?

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