Compressors, Gas Turbines and Jet Engines

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

A. 2-stroke engine
B. 4-stroke petrol engine
C. 4-stroke diesef engine
D. multi-cylinder engine
E. gas turbine

A. to increase the output
B. to increase the efficiency
C. to save fuel
D. to reduce the exit temperature
E. none of the above

A. varies as square root of the speed
B. Varies linearly to the speed
C. varies as square of the speed
D. varies as cube of the speed
E. is constant irrespective of variation in speed

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

A. ammonia and water vapour
B. carbon dioxide
C. nitrogen
D. hydrogen
E. none of the above

A. increase first at fast rate and then slow
B. increase first at slow rate and then fast
C. decrease continuously
D. first increase, reach maximum and then decrease
E. none of the above

A. toughness
B. fatigue
C. creep
D. corrosion resistance
E. bulk modulus

A. turbo-jet
B. turbo-propeller
C. rocket
D. ram-jet ,
E. pulsojet

A. mild steel
B. stainless steel
C. carbon steel
D. high alloy seel
E. high nicket alloy (neimonic)