Module -14 Final Practice Exam (Propulsion 24 Questions 30 Mints)

Module - 14 (Propulsion)

Final Practice Exam Test

  

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1. What is the primary cause of engine vibrations?
   1.   Excessive fuel flow
   2.   Uneven airflow through the engine
   3.   Imbalance in the engine's rotating components
2. How does the engine’s variable nozzle assist in managing performance?
   1.   By increasing the engine’s thrust output
   2.   By adjusting the exhaust gas flow for optimal engine efficiency
   3.   By controlling the temperature of the exhaust gases
3. What happens when a jet engine experiences a flameout?
   1.   The engine’s fuel supply is interrupted, causing the engine to stop producing thrust
   2.   The engine overheats, causing the turbine to fail
   3.   The engine produces excessive thrust
4. What is the main purpose of a centrifugal compressor in a jet engine?
   1.   To increase the temperature of the incoming air
   2.   To increase the pressure of the incoming air before it enters the combustion chamber
   3.   To reduce the speed of the exhaust gases
5. What is a characteristic of a high bypass ratio turbofan engine?
   1.   It is more suitable for supersonic flight
   2.   It produces more noise than a low bypass ratio turbofan
   3.   A larger proportion of air bypasses the engine core for increased efficiency
6. What is the role of the engine’s oil filter?
   1.   To assist in combustion
   2.   To monitor fuel pressure
   3.   To prevent contamination in the engine oil
7. What is the primary advantage of using a turbofan engine over a turbojet engine?
   1.   Higher speed
   2.   Greater fuel efficiency
   3.   Smaller size
8. What is the purpose of the variable stator blades in a jet engine?
   1.   To increase the airflow into the engine
   2.   To reduce the temperature of the exhaust gases
   3.   To control the airflow to the turbine
9. What is the function of the engine’s thrust rating system?
   1.   To provide thrust limits based on engine conditions
   2.   To monitor fuel consumption during flight
   3.   To control the speed of the propeller
10. What type of engine is commonly used in commercial airliners?
    1.   Piston engine
    2.   Turbojet engine
    3.   Turbofan engine
11. What is the purpose of the engine's oil system?
    1.   To lubricate the engine's moving parts and keep it cool
    2.   To assist in combustion
    3.   To provide power to the accessories
12. What type of engine is typically used in supersonic aircraft?
    1.   Turboprop engine
    2.   Turbofan engine
    3.   Turbojet engine
13. In a jet engine, which component is responsible for extracting energy from the exhaust gases?
    
    1.   Fan
    2.   Turbine
    3.   Compressor
14. What is the function of the thrust reverser in a jet engine?
    1.   To improve fuel efficiency during cruise
    2.   To redirect exhaust gases forward to reduce the aircraft’s speed during landing
    3.   To increase thrust during takeoff
15. What is the function of the bleed air system in a jet engine?
    1.   To supply compressed air for air conditioning, cabin pressure, and anti-icing
    2.   To increase the engine’s exhaust velocity
    3.   To cool the engine
16. What does "N1" refer to in a turbofan engine?
    1.   The speed of the turbine
    2.   The speed of the compressor
    3.   The speed of the fan
17. What is the function of the engine’s power turbine in a turboprop engine?
    1.   To increase fuel efficiency
    2.   To drive the propeller
    3.   To cool the engine
18. What is the purpose of the FADEC system in modern jet engines?
    
    1.   To manage engine performance and optimize fuel efficiency automatically
    2.   To monitor the temperature of exhaust gases
    3.   To cool the engine during operation
19. What is a key feature of a low-bypass turbofan engine?
    1.   It is more suitable for supersonic flight
    2.   It has a larger proportion of air bypassing the engine core
    3.   It has a smaller fan that produces less thrust
20. What is the typical operational range for a turbofan engine?
    
    1.   Low speeds and high altitudes
    2.   High speeds and low altitudes
    3.   Moderate speeds and moderate altitudes
21. What is a common cause of engine stall?
    
    1.   Rapid changes in airspeed or altitude
    2.   Excessive fuel supply
    3.   Insufficient air intake or compressor failure
22. In a turbofan engine, what is the function of the fan?
    1.   To compress the incoming air for combustion
    2.   To create thrust by accelerating air around the core
    3.   To provide power to the turbine
23. What type of engine is commonly used in small general aviation aircraft??
    
    1.   Turbojet engine
    2.   Turbofan engine
    3.   Turboprop engine
24. What is the primary function of a jet engine?
    
    1.   To generate lift for the aircraft
    2.   To produce thrust by expelling exhaust gases at high velocity
    3.   To convert fuel into mechanical power for propulsion