What's Your Knowledge In Propulsion Of Aircrafts?
Propulsion of Aircraft is an aircraft engine that generates a thrust, which is typically a propeller or a propulsive nozzle. These engines produce balance to drag of the airplane when the airplane is cruising and to exceed the drag of the airplane for the airplane to accelerate. How well do you understand the Propulsion of Aircraft? Find out by taking this quiz.
- 1.
After-burning process in a jet engine requires combustion of additional fuel in the?
- A.
Jet pipe
- B.
Jet Fuse
- C.
Compressor
- D.
Combustion Chamber
Correct Answer
A. Jet pipeExplanation
The after-burning process in a jet engine requires the combustion of additional fuel in the jet pipe. The jet pipe is a part of the engine that is located after the combustion chamber. It is responsible for directing the exhaust gases out of the engine and creating thrust. By injecting additional fuel into the jet pipe and igniting it, the after-burning process increases the temperature and velocity of the exhaust gases, resulting in a boost in thrust and overall engine performance.Rate this question:
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- 2.
What is the Major purpose of the fins which are placed around the cylinder head of an air-cooled engine?
- A.
To reduce the weight of the Engine
- B.
To allow heat to escape quickly
- C.
To reduce air from the engine compartment
- D.
To increase the air outlet in the cylinder
Correct Answer
B. To allow heat to escape quicklyExplanation
The fins placed around the cylinder head of an air-cooled engine serve the major purpose of allowing heat to escape quickly. As air flows over the fins, it helps in dissipating the heat generated during the combustion process. This prevents the engine from overheating and ensures efficient cooling. By increasing the surface area available for heat transfer, the fins enhance the cooling capacity of the engine, allowing it to operate at optimal temperatures.Rate this question:
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- 3.
The largest obtainable pitch angle on a variable pitch propeller is referred to as?
- A.
Take off pitch
- B.
Landing Pitch
- C.
Optimum pitch
- D.
Coarse Pitch
Correct Answer
D. Coarse PitchExplanation
The largest obtainable pitch angle on a variable pitch propeller is referred to as "Coarse Pitch." This term is used to describe the propeller blades being set at a larger angle, which allows for increased thrust and power during takeoff or when the engine needs to operate at high RPM. The coarse pitch setting helps to generate more lift and acceleration, making it suitable for situations where maximum performance is required.Rate this question:
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- 4.
The basic function of the constant speed unit (CSU) in an aircraft propeller system is to?
- A.
Feather the propeller engine
- B.
Maintain a selected engine speed power within the propeller
- C.
Maintain a constant propeller rate
- D.
Decrease the speed limit in the propeller
Correct Answer
B. Maintain a selected engine speed power within the propellerExplanation
The constant speed unit (CSU) in an aircraft propeller system is responsible for maintaining a selected engine speed power within the propeller. This means that it adjusts the pitch of the propeller blades to maintain a constant speed and prevent overspeeding or underspeeding of the engine. By controlling the propeller speed, the CSU ensures efficient engine operation and optimal performance of the aircraft.Rate this question:
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- 5.
The two main major of cooling piston aero engines are liquid cooling and air cooling. Which of the following is a major advantage of air cooling over liquid cooling?
- A.
Its cheaper to produce
- B.
It maintains temperature better over long distance
- C.
The engine can be easily streamlined
- D.
Longer engine life
Correct Answer
A. Its cheaper to produceExplanation
Air cooling is a major advantage over liquid cooling because it is cheaper to produce. This means that the cost of manufacturing an air-cooled piston aero engine is lower compared to a liquid-cooled engine. This cost advantage can make air-cooled engines more accessible and affordable for manufacturers and customers alike.Rate this question:
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- 6.
The process whereby airflow over the propeller blades of a failed engine keeps the propeller turning is called?
- A.
Wind milling
- B.
Propeller braking
- C.
Reverse control
- D.
Emergency braking
Correct Answer
A. Wind millingExplanation
Wind milling refers to the process where the airflow over the propeller blades of a failed engine keeps the propeller turning. This occurs due to the force of the wind pushing against the blades, causing them to rotate. This phenomenon can happen when an engine fails or is shut down, and the aircraft is still in motion. The term "wind milling" accurately describes this process as it involves the propeller blades rotating due to the wind's force.Rate this question:
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- 7.
The purpose of the distributor in a piston aero engine, is to distribute?
- A.
Cooling the major engines
- B.
High voltage electrical impulse to all cylinders
- C.
Low voltage electrical impulse to all cylinders
- D.
Cooling air to the major parts of the cooling propeller.
Correct Answer
B. High voltage electrical impulse to all cylindersExplanation
The purpose of the distributor in a piston aero engine is to distribute high voltage electrical impulse to all cylinders. This is important because it ensures that each cylinder receives the necessary spark at the correct time to ignite the fuel-air mixture and generate power. The distributor acts as a central hub, receiving electrical current from the ignition system and then distributing it to each spark plug in the cylinders. This ensures that the engine runs smoothly and efficiently.Rate this question:
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- 8.
One of the purposes of gudgeon pins in a piston engine is to?
- A.
Attach the pistons to their connecting rods
- B.
Fasten the two edges of the piston
- C.
Retain the Valves in the guides
- D.
Hold the sparking plugs in place
Correct Answer
A. Attach the pistons to their connecting rodsExplanation
Gudgeon pins, also known as wrist pins, play a crucial role in attaching the pistons to their connecting rods in a piston engine. These pins go through the small end of the connecting rod and the piston, allowing them to move in unison. The gudgeon pins provide a pivot point for the connecting rod, allowing it to transfer the reciprocating motion of the piston to the rotational motion of the crankshaft. This connection is vital for the proper functioning of the engine, as it ensures that the piston and connecting rod work together harmoniously to convert the energy from combustion into mechanical power.Rate this question:
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- 9.
Which of these is a turbojet engine?
- A.
Pegasus
- B.
Olympus 593
- C.
Hermes
- D.
Aramis
Correct Answer
B. Olympus 593Explanation
The Olympus 593 is a turbojet engine.Rate this question:
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- 10.
The Blade Twist in the Propeller helps?
- A.
Even out the trust along the length of the blade
- B.
Reduce noise levels
- C.
Make propelling Easier
- D.
Increase the friction between the blades
Correct Answer
A. Even out the trust along the length of the bladeExplanation
The blade twist in the propeller helps to even out the thrust along the length of the blade. This is important because it ensures that the propeller generates a consistent amount of thrust throughout its rotation, resulting in smoother and more efficient propulsion. By distributing the thrust evenly, the propeller can maintain a balanced and stable performance, which is crucial for aircraft and other vehicles that rely on propellers for propulsion.Rate this question:
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Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Jul 14, 2018Quiz Created by
Gregorynaomi
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