Category: Compressors, Gas Turbines and Jet Engines

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

A. 7 : 1
B. 15 : 1
C. 30 : 1
D. 40 : 1
E. 50: 1

A. closed cycle
B. open cycle
C. both of the above
D. closed/open depending on other con-siderations
E. unpredictable

A. Power consumption per unit of air delivered is low
B. Volumetric efficiency is high
C. It is best suited for compression ratios around 7:1
D. The moisture in air is condensed in the intercooler
E. Outlet temperature is reduced

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

A. gas turbine requires lot of cooling water
B. gas turbine is capable of rapid start up and loading
C. gas turbines have flat efficiency at part loads
D. gas turbines have high standby losses and require lot of maintenance
E. gas turbines can be used to generate power only

A. increases
B. decreases
C. first increases and then decreases
D. first decreases and then increases
E. remains same

A. start-stop motor
B. constant speed unloader
C. relief valve
D. variable speed
E. none of the above

A. 3.5 : 1
B. 5 : 1
C. 8 : 1
D. 12 : 1
E. 20 : 1

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