An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes________________?
A. One adiabatic, two isobaric, and one constant volume
B. Two adiabatic and two isobaric
C. Two adiabatic, one isobaric and one constant volume
D. One adiabatic, one isobaric and two constant volume
Isothermal compression though most efficient, but is not -practicable because_________________?
A. Ityrequires very big cylinder
B. It does not increase pressure much
C. It is impossible in practice
D. Compressor has to run at very slow speed to achieve it
Inter cooling in compressors__________________?
A. Cools the delivered air
B. Results in saving of power in compressing a given volume to given pressure
C. Is the standard practice for big compressors
D. Enables compression in two stages
Standard air is the air at_____________________?
A. Atmospheric conditions at any specific location
B. 20°c and 1 kg/cm2 and relative humidity 36%
C. 0°c and standard atmospheric conditions
D. 15°c and 1 kg/cm2
The compressor capacity with decrease in suction temperature_________________?
A. Increases
B. Decreases
C. Remains unaffected
D. May increase or decrease depending on compressor capacity
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
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
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