Aircraft Fuel Systems Flashcards
7 cards from real A&P practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Aircraft Fuel Systems flashcards as text
Which type of fuel metering system is most susceptible to carburetor ice formation?
Answer: Float-type carburetor
Float-type carburetors are most susceptible to icing because fuel vaporization combined with the pressure drop at the venturi causes significant temperature decreases that promote ice formation.
What is the primary purpose of a crossfeed fuel system in a multi-engine aircraft?
Answer: To allow any engine to draw fuel from any tank on the aircraft
A crossfeed system allows each engine to draw fuel from any tank, providing fuel management flexibility and enabling continued operation in the event of a fuel pump or engine failure.
How does a fuel injection system differ from a float-type carburetor in delivering fuel?
Answer: Fuel injection meters and delivers fuel under pressure directly to the intake ports or cylinders
Fuel injection systems meter and deliver fuel under pressure directly to the intake port or cylinder, providing more precise fuel metering and eliminating carburetor icing risk.
What color is 80/87 aviation gasoline?
Answer: Red
Grade 80/87 aviation gasoline is dyed red to distinguish it from higher octane grades such as 100LL (blue) and 100/130 (green).
What is the function of the fuel selector valve in an aircraft fuel system?
Answer: To select which fuel tank supplies fuel to the engine
The fuel selector valve allows the pilot or crew to choose which fuel tank will supply fuel to the engine, enabling proper fuel management and tank balancing.
Which type of fuel is used in turbine (jet) engines?
Answer: Jet-A or Jet-A1 kerosene-based fuel
Turbine engines use kerosene-based fuels such as Jet-A or Jet-A1, which have different energy content, flash point, and combustion characteristics than aviation gasoline.
What does a fuel quantity transmitter (sender unit) do in an aircraft fuel system?
Answer: It converts the fuel level in the tank to an electrical signal that drives the cockpit fuel quantity gauge
A fuel quantity transmitter uses a float or capacitance-type sensor to convert the fuel level in the tank into an electrical signal, which is then displayed on the cockpit fuel quantity gauge.