Category: Mechanical Engineering Mcqs

A. compression index
B. compression ratio
C. compressor efficiency
D. mean effective pressure
E. compressor effectiveness

A. gauge discharge pressure to the gauge intake pressure
B. absolute discharge pressure to the ab-solute intake pressure
C. pressures at discharge and suction cor-responding to same temperature
D. stroke volume and clearance volume
E. none of the above

A. the ratio of stroke volume to clearance volume
B. the ratio of the air actually delivered to the amount of piston displacement
C. reciprocal of compression ratio
D. index of compressor performance
E. proportional to compression ratio

A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. is not dependent upon compressin ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable

A. 20-30%
B. 40-50%
C. 60-70%
D. 70-90%
E. 90-100%

A. as large as possible
B. as small as possible
C. about 50% of swept volume
D. about 100% of swept volume
E. none of the above

A. mechanical efficiency
B. volumetric efficiency
C. isothermal efficiency
D. adiabatic efficiency
E. relative efficiency

A. radial flow
B. axial flow
C. centrifugal
D. combination of above
E. none of the above

A. ideal compression
B. adiabatic compression
C. botii isothermal and adiabatic compression
D. isentropic compression
E. isothermal compression

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
E. two isobaric, two adiabatic and one constant volume