Which of the following statement is correct?
A. The reciprocating compressors are best suited for high pressure and low volume capacity
B. The effect of clearance volume on power consumption is negligible for the same volume of discharge
C. Both A & B
D. None of the above
Answer C
The thrust of a jet propulsion power unit can be increased by
A. injecting water into the compressor
B. burning fuel after gas turbine
C. injecting ammonia into the combustion chamber
D. all of the above
Answer D
The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
A. pressure drop across the valves
B. superheating in compressor
C. clearance volume and leakages
D. All of the above
The mean effective pressure of the compressor is the
A. actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
B. volume of air delivered by the compressor
C. volume of air sucked by the compressor during its suction stroke
D. none of the above
A compressor at high altitudes will require __________ power.
A. Same
B. Less
C. more
Answer B
