NOTE
TO CHECK YOUR PREPARATION ,PLZ WRITE DOWN YOUR SELECTED OPTIONS (A,B,C) ON ROUGH PAGE AND AT THE END OF QUIZ , VERIFY YOUR SELECTED OPTIONS WITH THE CORRECT OPTIONS GIVEN BELOW
11. Which of the following is the ultimate limiting factor
of turbine engine operation?.
A. Compressor inlet air temperature.
B. Burner can pressure.
C. Turbine inlet temperature.
12. At altitude, idling RPM is.
A. same as at sea level.
B. higher than at sea level.
C. lower than at sea level.
.
13. Thrust.
A. increases with high temperature.
B. increases with low temperature.
C. decreases with low temperature.
14. Which of the following variables affect the inlet air
density of a turbine engine?.
A. Altitude of the aircraft, Ambient temperature.
B. Compression ratio, Turbine inlet temperature, Altitude of
the aircraft, Ambient temperature.
C. Speed of the aircraft, Compression ratio, Turbine inlet
temperature,Altitude of the aircraft.
15. The propulsive efficiency is.
A. low, with a low mass flow acceleration.
B. high, with a low mass flow acceleration.
C. high, with a high mass flow acceleration.
16. The RPM for maximum power would be.
A. lower on a colder day.
B. lower on a hotter day.
C. greater on a colder day.
17. How does engine thrust vary with temperature?.
A. Increase in temperature gives greater thrust because of
low friction in compressors.
B. Low temperatures give low thrust.
C. Low temperature gives greater mass flow and therefore
greater thrust.
18. A method of comparing engine efficiencies is by
comparing.
A. fuel consumption.
B. thrust to weight ratio.
C. specific fuel consumption.
19. With a fixed throttle in a climb.
A. RPM will increase.
B. RPM will remain constant.
C. RPM will decrease.
20. The point of maximum velocity in the engine is in the.
A. exhaust exit nozzle.
B. combustion chamber.
C. nozzle guide vanes.
ABOVE QUESTIONS WITH ANSWERS
11. Which of the following is the ultimate limiting factor of turbine engine operation?.
A. Compressor inlet air temperature.
B. Burner can pressure.
C. Turbine inlet temperature.
Ans : Turbine inlet temperature.
Explanation: NIL.
12. At altitude, idling RPM is.
A. same as at sea level.
B. higher than at sea level.
C. lower than at sea level.
Ans : higher than at sea level.
Explanation: Due to decreased density there is less resistance to rotation.
13. Thrust.
A. increases with high temperature.
B. increases with low temperature.
C. decreases with low temperature.
Ans : increases with low temperature.
Explanation: Jeppesen Gas Turbine Powerplants Page 2-33 Refers.
14. Which of the following variables affect the inlet air density of a turbine engine?.
A. Altitude of the aircraft, Ambient temperature.
B. Compression ratio, Turbine inlet temperature, Altitude of the aircraft, Ambient temperature.
C. Speed of the aircraft, Compression ratio, Turbine inlet temperature,Altitude of the aircraft.
Ans : Altitude of the aircraft, Ambient temperature.
Explanation: NIL.
15. The propulsive efficiency is.
A. low, with a low mass flow acceleration.
B. high, with a low mass flow acceleration.
C. high, with a high mass flow acceleration.
Ans : high, with a low mass flow acceleration.
Explanation: Jeppesen Gas Turbine Powerplants Page 2-37 Refers - a large mass of air moved slowly!.
16. The RPM for maximum power would be.
A. lower on a colder day.
B. lower on a hotter day.
C. greater on a colder day.
Ans : lower on a colder day.
Explanation: Jeppesen Gas Turbine Powerplant Page 3-16 refers.
17. How does engine thrust vary with temperature?.
A. Increase in temperature gives greater thrust because of low friction in compressors.
B. Low temperatures give low thrust.
C. Low temperature gives greater mass flow and therefore greater thrust.
Ans : Low temperature gives greater mass flow and therefore greater thrust.
Explanation: Jeppesen Aircraft Gas Turbine Power plant Page 2-33 Refers.
18. A method of comparing engine efficiencies is by comparing.
A. fuel consumption.
B. thrust to weight ratio.
C. specific fuel consumption.
Ans : specific fuel consumption.
Explanation: Jeppesen Aircraft Gas Turbine Power plant Page7-3 Refers.
19. With a fixed throttle in a climb.
A. RPM will increase.
B. RPM will remain constant.
C. RPM will decrease.
Ans : RPM will increase.
Explanation: Jeppesen Gas Turbine Powerplants Page 3-15 refers.
20. The point of maximum velocity in the engine is in the.
A. exhaust exit nozzle.
B. combustion chamber.
C. nozzle guide vanes.
Ans : exhaust exit nozzle.
Explanation: Rolls Royce The Jet Engine page 15 refers.
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