In a refrigerating machine, if the lower temperature is fixed, then t – McqOptions

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1.	In a refrigerating machine, if the lower temperature is fixed, then the C.O.P. of machine can be increased by?
A.	Increasing the higher temperature
B.	Decreasing the higher temperature
C.	Operating the machine at lower speed
D.	Operating the machine at higher speed
Answer» C. Operating the machine at lower speed

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