Aircraft Propulsion MCQs December 5, 2025August 22, 2024 by u930973931_answers 20 min Score: 0 Attempted: 0/20 Subscribe 1. What is the primary function of an aircraft propulsion system? (A) To generate thrust (B) To control aircraft attitude (C) To provide lift (D) To enhance aerodynamics 2. Which type of engine uses a rotating fan to produce thrust? (A) Turbofan (B) Turbojet (C) Turboshaft (D) Ramjet 3. What is the main difference between a turbojet and a turbofan engine? (A) Turbojet engines use a fan, while turbofan engines do not (B) Turbojets are used in commercial aircraft, while turbofans are used in military aircraft (C) Turbofan engines are generally quieter and more efficient at high speeds (D) Turbofans produce less thrust than turbojets 4. Which engine type is commonly used in helicopters? (A) Turbojet (B) Turbofan (C) Ramjet (D) Turboshaft 5. What does the term âafterburnerâ refer to in a jet engine? (A) A component that cools the engine (B) A mechanism that changes the engineâs direction (C) A system for reducing engine noise (D) A device that increases thrust by burning additional fuel 6. In a turbofan engine, what is the primary purpose of the fan? (A) To generate electrical power (B) To provide thrust by accelerating air through the engine (C) To cool the engine (D) To mix fuel and air 7. What is the main advantage of a turboprop engine over a turbojet engine? (A) Better efficiency at low speeds and short takeoff and landing distances (B) Higher thrust at high speeds (C) Greater fuel consumption (D) More complex maintenance 8. Which component of a jet engine compresses incoming air? (A) Turbine (B) Fan (C) Compressor (D) Nozzle 9. What is the function of the turbine in a jet engine? (A) To compress air (B) To eject exhaust gases (C) To mix fuel with air (D) To drive the compressor and generate thrust 10. Which engine type is designed to operate at supersonic speeds? (A) Ramjet (B) Turbofan (C) Turboshaft (D) Turbojet 11. What does the term âthrust vectoringâ refer to? (A) Increasing the fuel flow to the engine (B) Changing the direction of thrust to improve maneuverability (C) Adjusting the engineâs altitude (D) Reducing engine noise 12. Which type of engine is typically used in space rockets? (A) Turbojet (B) Rocket engine (C) Turbofan (D) Ramjet 13. What is the purpose of the âbypass ratioâ in a turbofan engine? (A) To determine the amount of air bypassing the core of the engine (B) To calculate the fuel efficiency (C) To measure the engineâs thrust output (D) To assess the noise level of the engine 14. In a turbojet engine, what is the primary source of thrust? (A) The fan (B) The compressor (C) The exhaust gases (D) The turbine 15. What is the main advantage of a high-bypass turbofan engine? (A) Increased thrust (B) Lower fuel efficiency (C) Reduced noise and better fuel efficiency (D) Greater complexity 16. Which component in a turboprop engine converts the engineâs power into rotational energy? (A) Compressor (B) Turbine (C) Propeller (D) Fan 17. Which type of engine is commonly used in commercial jet airliners? (A) Turbojet (B) Turbofan (C) Turboshaft (D) Ramjet 18. What does âintercoolerâ do in an aircraft propulsion system? (A) Reduces engine vibration (B) Heats the fuel for better combustion (C) Increases air pressure in the engine (D) Cools the compressed air before it enters the combustion chamber 19. Which part of the engine converts the energy from hot gases into mechanical work? (A) Turbine (B) Compressor (C) Fan (D) Nozzle 20. What is a key characteristic of a ramjet engine? (A) It operates efficiently at low speeds (B) It uses a rotating fan for thrust (C) It has an afterburner for additional thrust (D) It relies on the aircraftâs high speed to compress air for combustion