Related Questions

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
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?
A Less power requirement
B Better mechanical balance
C Less loss of air due to leakage past the cylinder
D Lower volumetric efficiency
In open cycle turbojet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the
A Thrust and range of aircraft
B Efficiency of the engine
C Both (A) and (B)
D None of these
Reheating in a gas turbine
A Increases the thermal efficiency
B Increases the compressor work
C Increases the turbine work
D Decreases the thermal efficiency
The main purpose of reheating in gas turbine is to
A Increase temperature
B Reduce turbine size
C Increase power output
D Increase speed
Reheating in gas turbine results in
A Increase of work ratio
B Decrease of thermal efficiency
C Decrease of work ratio
D Both (A) and (B) above
The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will
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
Reheating of steam in a turbine
A Increases the work-done through the turbine
B Increases the efficiency of the turbine
C Reduces wear on the blades
D All of these
In multistage compressor, the isothermal compression is achieved by
A Employing inter-cooler
B By constantly cooling the cylinder
C By running compressor at very slow speed
D By insulating the cylinder
Interstage coolers are provided in a multistage compressor to
A Save power in compressing a given volume to a given pressure
B Cool the delivered air
C Achieve the exact delivery pressure
D None of these

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