Category: Compressors, Gas Turbines and Jet Engines

A. temperature during compression remains constant
B. no heat leaves or enters the compressor cylinder during cornpression
C. temperature rise follows a linear relationship
D. work done is maximum
E. entropy decreases

A. 10: 1
B. 15: 1
C. 20 : 1
D. 60 : 1
E. 100 :

A. 50%
B. 75%
C. 85%
D. 90%
E. 99%

A. Brayton or Atkinson cycle
B. Carnot cycle
C. Rankine cycle
D. Erricsson cycle
E. Joule cycle

A. conversion of pressure energy into kinetic energy
B. conversion of kinetic energy into pres¬sure energy
C. centripetal action
D. generating pressure directly
E. combination of A. and D.

A. jet velocity
B. twice the jet velocity
C. half the jet velocity
D. average of the jet velocity
E. no such co-relationship with jet velocity exists

A. low.er heating value
B. higher heating value
C. heating value
D. higher calorific value
E. highest calorific value

A. using mulit-stage compressor with mfercooler
B. adding heat exchanger
C. injecting water in/around combustion chamber
D. reheating the air after partial expansion in the turbine
E. all of the above

A. 34%
B. 50%
C. 60%
D. 72%
E. 85%.

A. increase of work ratio
B. decrease of thermal efficiency
C. decrease of work ratio
D. both A. and B. above
E. both B. and C. above