A refrigeration cycle is a reversed heat engine. Which of the followin – McqOptions

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1.	A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect ?
A.	Vapor compression cycle using expansion valve.
B.	Air refrigeration cycle.
C.	Vapor compression cycle using expansion engine.
D.	Carnot refrigeration cycle.
Answer» E.

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