Flashcards on Aircraft Engine Fuel Systems
Aircraft Engine Fuel Systems: Comprehensive Student Guide
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Aircraft Fuel and Engine Systems
12 cards
Card 1
Question: Why is an aircraft reciprocating engine killed by placing the mixture control in the cutoff position rather than by using the magneto switch?
Answer: Cutting off the mixture shuts off fuel to the cylinders, leaving combustion chambers full of air with no fuel, making the engine less likely to fire i
Card 2
Question: Where is the fuel from a continuous-flow fuel injection system discharged?
Answer: Through injector nozzles screwed into the cylinder heads near the intake valves.
Card 3
Question: In which direction relative to the wind should a jet aircraft be positioned when the fuel control is being trimmed?
Answer: (Answer not provided in the content.)
Card 4
Question: What engine parameters are sensed by the fuel control unit of a turbine engine?
Answer: Engine RPM, inlet air pressure, compressor discharge pressure, burner can pressure, and inlet air temperature.
Card 5
Question: When does the acceleration system operate on an aircraft carburetor?
Answer: When the throttle is suddenly opened.
Card 6
Question: What is the purpose of the bypass valve in an engine-driven fuel pump?
Answer: To allow fuel to flow around the engine-driven pump for starting and for emergency operation if the engine-driven pump fails.
Card 7
Question: On which side of the firewall is the engine fuel shutoff valve located?
Answer: On the side of the firewall away from the engine.
Card 8
Question: What are the three purposes for the boost pumps in an aircraft fuel system?
Answer: To provide fuel pressure for starting the engine, to pressurize fuel lines to prevent vapor lock, and to transfer fuel from one tank to another.
Card 9
Question: What kind of boost pump is used in most aircraft fuel systems?
Answer: Electrically operated centrifugal pumps.
Card 10
Question: Where does an engine-driven fuel pump direct the excess fuel from its pressure relief valve?
Answer: Back to the inlet side of the pump.