Flashcards on Aircraft Fuel Systems Explained
Aircraft Fuel Systems Explained: Components & Functions
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Aircraft Fuel Systems
12 cards
Card 1
Question: Why are fuel tanks divided into compartments or fitted with baffles?
Answer: To keep the fuel from surging back and forth as the aircraft changes its attitude in flight.
Card 2
Question: What is an integral fuel cell?
Answer: A part of the structure where all seams and joints are sealed to be fuel tight, so the structure itself becomes the fuel tank.
Card 3
Question: What are the four general types of fuel quantity gauges?
Answer: Sight glass, mechanical, electrical, and electronic.
Card 4
Question: Which type of fuel quantity gauge is more accurate and why?
Answer: The electronic capacitance type, because it measures by weight instead of gallons.
Card 5
Question: Where are fuel system strainers located?
Answer: One strainer is in the outlet to the tank, and the main strainer is in the fuel line between the outlet of the fuel tank and the inlet to the fuel met
Card 6
Question: What are three uses of a centrifugal booster pump installed in an aircraft fuel tank?
Answer: To produce fuel pressure for starting the engine, to keep fuel from vapor locking at high altitude, and to transfer fuel from one tank to another.
Card 7
Question: Why do engine-driven fuel pumps have a bypass valve?
Answer: So fuel from the booster pump can flow around the engine-driven pump for starting and to supply the engine if the engine-driven pump fails.
Card 8
Question: Why must an aircraft fuel valve have a detent in its operating mechanism?
Answer: The detent gives the pilot a positive indication by feel when the selector valve is in the full ON and full OFF positions.
Card 9
Question: What fuel characteristic is measured with the mass-flow fuel flowmeter used on turbine engine aircraft?
Answer: The density of the fuel.
Card 10
Question: What is used as a flowmeter for a fuel-injected, horizontally opposed aircraft engine?
Answer: A pressure gauge that measures the pressure drop across the injector nozzles in the engine.