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
0
The- most efficient method of compressing air is to compress it_________________?
0
Isothermal compression effeicency can be attained by running the compressor__________________?
A. isothermally
B. adiabatically
C. isentropically
D. isochronically
E. as per law pV
0
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_________________?
A. at very high speed
B. at very slow speed
C. at average speed
D. at zero speed
E. isothermally
0
The overall isothermal eiffciency of compressor is defined as the ratio of_______________?
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
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1 m of air at atmospheric condition weighs approximately__________________?
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
0
Free air is the air at________________?
A. 0.5 kg
B. 1.0 kg
C. 1.3 kg
D. 2.2 kg
E. 3.2 kg
0
The capacity of a compressor is 5 m /mih. 5 m /min refers to_______________?
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
E. 25°C, 1 kg/cm2 and relative humidity of 50%.
0
Maximum work is done in compressing air when the compression is_________________?
A. standard air
B. free air
C. compressed air
D. compressed air at delivery pressure
E. air sucked