Category: Compressors, Gas Turbines and Jet Engines

A. closed cycle gas turbine is an I.C engine
B. gas turbine uses same working fluid over and over again
C. air-fuel ratio in a gas turbine is 100 : 1
D. ideal efficiency of closed cycle gas turbine plant is more than carnot cycle efficiency
E. thrust in turbo-jet is produced by nozzle exit gases

A. at very high speed
B. at very slow speed
C. at average speed
D. at zero speed
E. isothermally

A. to accommedate Valves in the cylinder head
B. to provide cushioning effect
C. to attain high volumetric efficiency
D. to avoid mechanical bang of piston with cylinder head
E. to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head

A. h.p. compressor L connected to h.p. turbine and l.p. compressor ot l.p. tur-bine
B. h.p. compressor is connected to l.p. turbine and l.p. compressor is con-nected to h.p. turbine
C. both the arrangements can be employed
D. all are connected in series
E. none of the above

A. atmosphere
B. back to the compressor
C. discharge nozzle
D. vacuum
E. none of the above

A. standard air
B. free air
C. compressed air
D. compressed air at delivery pressure
E. air sucked

A. heated
B. compressed air before entering the combustion chamber is heated
C. bled gas from turbine is heated and readmitted for complete expansion
D. exhaust gases drive the compressor
E. part of exhaust gases are heated and mixed up with atmospheric air to utilise exhaust heat

A. cool the air
B. decrease the delivery temperature for ease in handling
C. cause moisture and oil vapour to drop out
D. reduce volume
E. increase pressure

A. same
B. more
C. less
D. zero
E. dependent on power and speed

A. less
B. more
C. same
D. may be less or more depening upon speed
E. none of the above