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
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
A. multi-stage compression
B. cold water spray
C. both A. and B. above
D. fully insulating the cylinder
E. high stroke
1 m of air at atmospheric condition weighs approximately__________________?
A. 0.5 kg
B. 1.0 kg
C. 1.3 kg
D. 2.2 kg
E. 3.2 kg