6) The overall isothermal effciency of compressor is defined as the ratio of

isothermal h.p. to the BHP of motor

isothermal h.p. to adiabatic h.p.

power to drive compressor to isothermal h.p.

work to compress air isothermally to work for actual compression

Answer is:

isothermal h.p. to the BHP of motor

isothermally

adiabatically

isentropically

isochronically

Answer is:

isothermal

adiabatic

polytropic

any one of the above

Answer is:

atmospheric

slightly more than atmospheric

pressure sightly less than atmospheric and temperature slightly more than atmospheric.

pressure slightly more than atmospheric and temperature slightly less than atmospheric

Answer is:

at very high speed

at very slow speed

at average speed

at zero speed

Answer is: