A reversible engine performing as refrigerator has COP=33%. If the same machine operates as engine, its efficiency will be

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📊 Engineering Thermodynamics

Q. A reversible engine performing as refrigerator has COP=33%. If the same machine operates as engine, its efficiency will be

(A) 67%
(B) 33%
(C) 75%
(D) 37.5%

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✅ Correct Answer: (A) 67%

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