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

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

A. Isothermally
B. Adiabatically
C. Isentropically
D. Isochronically

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

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

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

The pressure and temperature conditions of air at the suction of compressor are_________________?

A. atmospheric
B. slightly more than atmospheric
C. slightly less than atmospheric
D. pressure slightly more than atmospheric and temperature slightly less than atmospheric

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

Free air is the air at________________?

A. Atmospheric conditions at any specific location
B. 20°c and 1 kg/cm2 and relative humidity of 36%
C. 0°c and standard atmospheric conditions
D. 15°c and 1 kg/cm2

The capacity of a compressor is 5 m /mih. 5 m /min refers to_______________?

A. Standard air
B. Free air
C. Compressed air
D. Compressed air at delivery pressure

Maximum work is done in compressing air when the compression is_________________?

A. Isothermal
B. Adiabatic
C. Polytropic
D. Any one of the above