If the COP of Carnot refrigerator is 4, then the thermal efficiency of the Carnot engine would be ________.

If the COP of Carnot refrigerator is 4, then the thermal efficiency of

1.	If the COP of Carnot refrigerator is 4, then the thermal efficiency of the Carnot engine would be ________.
A.	0.33
B.	0.25
C.	0.2
D.	0.18
Answer» D. 0.18

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If the COP of Carnot refrigerator is 4, then the thermal efficiency of the Carnot engine would be ________.

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