Subscribe TechModgy to learn about new technologies!

The overall isothermal efficiency of compressor is defined as the ratio of

A. Isothermal h.p. to the BHP of motor

B. Isothermal h.p. to adiabatic h.p.

C. Power to drive compressor to isothermal h.p.

D. Work to compress air isothermally to work for actual compression

Please do not use chat terms. Example: avoid using "grt" instead of "great".