Flashcards on Aircraft Engine Fuel Systems
Aircraft Engine Fuel Systems: A Comprehensive Student Guide
Tap to flip · Swipe to navigate
Fuel System
27 cards
Card 1
Question: What should be done to a reciprocating engine that has been operated on turbine engine fuel?
Answer: Drain and flush the entire fuel system with proper fuel; perform a compression check and borescope inspection of all cylinders; drain the oil and chec
Card 2
Question: What are the two basic types of turbine engine fuel?
Answer: Jet A and Jet A-1 (kerosene-based) and Jet B (gasoline-based).
Card 3
Question: Which turbine fuels are kerosene-based and which turbine fuel is gasoline-based?
Answer: Jet A and Jet A-1 are kerosene-based (similar to JP-5); Jet B is gasoline-based (similar to JP-4).
Card 4
Question: Why do some turbine engine fuel systems include a fuel heater?
Answer: To keep fuel warm enough so water that precipitates from the fuel will not freeze on the filters.
Card 5
Question: What are two reasons Prist is added to turbojet fuel?
Answer: It is biocidal (kills scum-forming bacteria in the fuel tank) and acts as an antifreeze, lowering the freezing point of entrained water released from
Card 6
Question: Why do some aircraft fuel filters have a built-in relief valve?
Answer: So unfiltered fuel will be allowed to flow to the fuel control device if the filter becomes plugged with ice or contaminants.
Card 7
Question: Why is a reciprocating engine stopped by moving the mixture control to Cutoff rather than by using the magneto switch?
Answer: Cutting off the fuel leaves combustion chambers full of air with no fuel, making the engine less likely to fire if the propeller is pulled through wit
Card 8
Question: Where is fuel discharged from in a continuous-flow fuel injection system?
Answer: Through injector nozzles screwed into the cylinder heads near the intake valves.
Card 9
Question: In which direction should a jet aircraft be positioned when trimming the fuel control relative to wind speed?
Answer: If wind <10 mph: any direction. If wind 10–25 mph: face into the wind. Do not trim if wind >25 mph.
Card 10
Question: What engine parameters are sensed by a turbine engine's fuel control unit?
Answer: Engine RPM, inlet air pressure, compressor discharge pressure, burner can pressure, and inlet air temperature.