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

Correct Answer: Increases the thermal efficiency

Reheating is applied in a gas turbine in such a way that it increases the turbine work without increasing the compressor work or melting the turbine materials.
When a gas turbine plant has a high pressure and low pressure turbine a reheater can be applied successfully.
Bissoy MCQ
#Mechanical Engineering #Compressors #Gas Turbines And Jet Engines

Related Questions

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 multistage expansion gas turbine ________ compressor work.
A Has no effect on
B Decreases
C Increases
D None of these
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
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
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
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is
A Low
B High
C Same
D Low/high depending on make and type
A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.
A Same
B Lower
C Higher
D None of these
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
A Delivers unit discharge under unit head
B Delivers unit discharge under unit speed
C Develops unit power under unit head
D Develops unit power under unit speed
An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.
A Walking beam
B Shaft
C Tunnel
D Rotary hearth

Next steps