Turbofan engine employs ____________________ ?

A. One air stream
B. Two or more air streams
C. No air stream
D. Solid fuel firing

The efficiency and work ratio of a gas turbine plant can be increased by _____________________?

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

The compression ratio in a jet engine varies proportional to ____________________?

A. Speed
B. Speed
C. Altitude
D. Vspeed

For speed above 3000 km/hour, it is more advantageous to use____________________?

A. Turbo-jet engine
B. Ram-jet engine
C. Propellers
D. Rockets

The efficiency of jet engine is__________________?

A. Higher at ground
B. Higher at high altitudes
C. Same at all altitudes
D. Higher at high speed

In air breathing jet engine, the jet is formed by expanding__________________?

A. gases
B. solids
C. liquid
D. plasma

Maximum temprature in a gas turbine is of the order of COMPRESSORS, GAS TURBINES AND JET ENGINES______________________?

A. 2500°c
B. 2000°c
C. 1500°c
D. 1000°c

Reheating in multistage expansion gas turbine results in____________________?

A. High thermal efficiency
B. Reduction in compressor work
C. Decrease of heat loss in exhaust
D. Maximum work output

Gas turbine cycle with Regenerator __________________?

A. Increases thermal efficiency
B. Allows high compression ratio
C. Decreases heat loss is exhaust
D. Allows operation at very high altitudes

The main purpose of reheating in gas turbine is to__________________?

A. Increase temperature
B. Reduce turbine size
C. Increase power output
D. Increase speed