POWERPLANT- GENERAL Flashcards
What does the term ‘powerplant’ refer to in aviation?
The engine and associated components
What is the primary purpose of an aircraft powerplant?
To provide the necessary thrust to propel the aircraft
What is ‘thrust’ in the context of an aircraft engine?
The force generated by the engine to move the aircraft forward
In a reciprocating engine, what does the term ‘stroke’ refer to?
The movement of the piston from top to bottom
What is the main disadvantage of using a reciprocating engine in aircraft?
Low power-to-weight ratio
What is the purpose of an engine cowling?
Reduce drag and aid in cooling
Which type of fuel is typically used in reciprocating engines?
Avgas
Which type of fuel is typically used in jet engines?
Jet-A
Which type of engine uses a propeller to generate thrust?
Turboprop
Which type of engine is most commonly used in commercial airliners?
Turbofan engine
What is the main function of an aircraft engine’s oil system?
Lubricate moving parts
What does the term ‘specific fuel consumption’ refer to?
The fuel required to produce a unit of thrust
What is a turbojet engine primarily used for?
High-speed and high-altitude flight
What is the primary purpose of using fuel additives in aviation fuels?
To prevent corrosion and icing
According to FAA regulations, what color is 100LL aviation gasoline (AVGAS)?
Blue
Regulations state that fuel system icing inhibitors must be added to which type of fuel?
Jet-A
What does the term ‘compressor stall’ refer to in a jet engine?
Momentary loss of airflow through the compressor
Which type of turbine is commonly used in modern jet engines?
Axial-flow turbine
What does the term ‘bypass ratio’ refer to in a turbofan engine?
Ratio of bypassed air to engine core air
What is the primary advantage of using a turbofan engine over a turbojet engine?
Better fuel efficiency
What is the purpose of an oil cooler bypass valve in an aircraft engine?
Bypass oil when it is cold
Which type of turbine engine uses both axial and centrifugal compressors?
Turboshaft
What is the purpose of a fire sleeve in an aircraft engine?
Protect fuel lines from heat and flames
What is the purpose of the diffuser in a centrifugal compressor?
Convert kinetic energy into pressure
What is the primary purpose of the induction system in an aircraft engine?
Supply air to the engine
What is the function of a fuel vapor separator in an aircraft fuel system?
Separate air from fuel
What is the primary purpose of oil additives in aircraft engines?
To enhance lubrication and reduce wear
The primary purpose of an engine oil cooler is to:
Maintain optimum oil temperature
What is the function of a fuel pump in an aircraft fuel system?
To pressurize and deliver fuel to the engine
What is the function of a de-icing boot on an aircraft engine?
Remove ice from the propeller and engine surfaces
What does the term ‘stoichiometric mixture’ refer to in engine operation?
An ideal fuel-to-air ratio for complete combustion
What is the main purpose of the engine oil system?
To reduce friction between moving parts
Which of the following checks before each flight regarding engine oil?
Oil level
What is the purpose of an oil cooler in an aircraft engine?
To cool the oil before it returns to the engine
What is ‘compressor stall’ in a jet engine?
The disruption of airflow through the compressor causing a loss of compression
What is the primary function of an engine fire detection system?
To alert the pilot of a potential fire hazard
How is the power output of a reciprocating engine typically measured?
In horsepower
What does ‘TSO’ stand for in aviation maintenance?
Technical Standard Order
What is the function of a ‘scavenge pump’ in a lubrication system?
To return oil to the oil tank from various parts of the engine
How does the pilot control the aircraft’s engine power?
Using the throttle
