When the lower temperature is fixed COP of a refrigerating machine can

1.	When the lower temperature is fixed COP of a refrigerating machine can be improved by:
A.	Operating the machine at higher speeds
B.	Operating the machine at lower speeds
C.	Raising the higher temperature
D.	Lowering the higher temperature
Answer» E.

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When the lower temperature is fixed COP of a refrigerating machine can be improved by:

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