Free air is the air at________________?

Adiabatic compression is one in which___________________?

A. temperature during compression remains constant

B. no heat leaves or enters the compressor cylinder during cornpression

C. temperature rise follows a linear relationship

D. work done is maximum

E. entropy decreases

The- most efficient method of compressing air is to compress it_________________?

A. isothermally

B. adiabatically

C. isentropically

D. isochronically

E. as per law pV

Isothermal compression effeicency can be attained by running the compressor__________________?

A. at very high speed

B. at very slow speed

C. at average speed

D. at zero speed

E. isothermally

Isothermal compression efficiency, even when running at high speed, can be approached by using A. multi-stage compression B. cold water spray C. both A. and B. above D. fully insulating the cylinder E. high stroke_________________?
Isothermal compression efficiency, even when running at high speed, can be approached by using

A. multi-stage compression

B. cold water spray

C. both A. and B. above

D. fully insulating the cylinder

E. high stroke

The overall isothermal eiffciency 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

E. isothermal work to ideal work