When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by Options: A . &nbspOperating the machine at higher speeds B . &nbspOperating the machine at lower speeds C . &nbspRaising the higher temperature D . &nbspLowering the higher temperature

When the lower temperature of a refrigerating machine is fixed, then the coeffic

Question

When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

Options:

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: Option D

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