A. isentropic
B. isothermal
C. polytropic
D. somewhere in between isentropic and isothermal
E. none of the above
Related Mcqs:
- For a two stage compressor* if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will___________________?
A. increase
B. decrease
C. remain unaffected
D. other factors control it
E. unpredictable - The work done per unit mass of air in compression will’be least when n is equal to______________?
A. 1
B. 1.2 ,
C. 1.3
D. 1.4
E. 1.5 - For minimum work in multistage compression, assuming same index of compression in all stages_________________?
A. work done in first stage should be more
B. work done in subsequent stages should increase
C. work done in subsequent stages should decrease
D. work done in all stages should be equal
E. work done in any stage is no criterion for minimum work but depends on other factors - Maximum work is done in compressing air when the compression is_________________?
A. isothermal
B. adiabatic
C. polytropic
D. any one of the above
E. none of the above - In multistage compressor, the isothermal compression is achieved by_________________?
A. employing intercooler
B. by constantly cooling the cylinder
C. by running compressor at very slow speed
D. by insulating the cylinder
E. none of the above - The vloumetric efficiency of compressor with increase in compression ratio will ___________________?
A. increase
B. decrease
C. remain same
D. may increase/decrease depending on clearance volume
E. none of the above - 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_________________?
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 - The advantage of multistage compression over single stage compression is ________________?
A. lower power consumption per unit of air delivered
B. higher volumetric efficiency
C. decreased discharge temperature
D. moisture free air
E. all of the above - The ratio of work doen per cycle to the swept volume in case of compressor is called ______________?
A. compression index
B. compression ratio
C. compressor efficiency
D. mean effective pressure
E. compressor effectiveness - The net work input required for compressor with increase in clearance volume_____________________?
A. increases
B. decreases
C. remains same
D. increases/decreases depending on com-pressor capacity
E. unpredictable
