11.10 Fuel Flashcards
What would a milky appearance in a fuel sample indicate?
Water
The lowest temperature that an ignitable vapour is given off a fuel is known as…
The flash point
A fuel tank that is part of the structure is termed as what type?
Integral
What component ensures the booster remains wet?
Flap/one way valves into the collector box
Ribs act as what within the wing structure?
Baffles
How is fuel prevented from boiling at altitude?
Positive pressure
How does a NACA duct work?
Converts ram air into static pressure for pressurisation
What prevents the fuel entering the vent system?
Float valves in the vent system
What is the normal sequence of fuel usage on the aircraft?
- Centre
- Wing inner
- Wing outer
- Wing together
What is the maximum refuelling pressure?
50psi
In what part of a fuel system is the jet pump and when will it operate?
Water scavenge and fuel scavenge system when booster pump running
What is the principle of the fuel level sensors?
- 3 types
- Capacitance
- Resistance (thermistor)
- Magnetism (reed switch)
How is fuel prevented from vaporising during fuel jettison?
Anti-corona discharge nozzles
If a fuel pump failed, how would fuel be provided to the engines?
- Pump bypass
- Feed by suction or gravity
Which tanks in a large commercial aircraft are not capable of gravity refueling?
Centre and stabiliser
