Engine Fuel Systems Flashcards
The color of avgas 80 is?
Red
The color of avgas 100 is?
Green
The color of avgas 100LL
Blue
Octane
a number that is used to measure the antiknock properties of a liquid motor fuel (such as gasoline) with a higher number indicating a smaller likelihood of knocking
Which engine Driven fuel pump is a positive (constant) displacement pump?
All engine driven fuel pumps.
The color of Jet A is?
Colorless or a straw color.
The color of jet A-1 is?
Colorless or a straw color.
The color of jet b is?
Colorless or a straw color.
The two main types of aviation fuel are?
Avgas and Jet fuel.
What are the three main grades of avgas?
Avgas 80
Avgas 100
Avgas 100LL
The three main Grades of jet fuel are?
Jet A
Jet A-1
Jet B
All fuel sources should avoid what?
All heat sources, sharp bends, rises, and falls.
Fuel lines should be routed ___ electrical wiring.
Below
___ must have 150% in all normal flight attitudes and for engine fuel consumptions at take-off.
Gravity Fed Fuel Systems.
___ must have 125% capabilities in all normal flight altitudes and for fuel consumptions at take-off.
Pressure Fed Fuel Systems.
All means of rapidly shutting off fuel and these valves must be located ___ the firewall.
Behind
(True or False)
The fuel shut off can be located on the side of the side of the engine.
False, it must be located behind the firewall.
(True or False)
Fuel tanks don’t have to be vented if there is a pressure release in the fuel pump.
False, Fuel tanks must be vented to prevent negative pressure during fuel draws.
All systems must have a ____ drain and/or screen.
low point
(True or False)
There must be one engine driven pump for each engine and a means for bypass incase of failure.
True
The major categories of aircraft fuel systems are?
Gravity Feed and Pressure Feed.
A sealed portion of the aircraft’s wing, used to store fuel.
Wet Wing or integral.
Fuel tank made of flexible material placed into the aircraft. (offers the best in-flight stability.)
Fuel Bladder
(Utilized by larger aircraft) Multiple cells, all interconnected to allow for fuel transfers and cross feeding engines.
Multiple Cell Fuel tanks. (Integral)
(True or False)
Main filters are typically placed at low points in the fuel system.
True, They are typically placed at low points to collect as many contaminates as possible.
Three types of of strainers/filters differing by their filtering method.
Surface Filtration
Edge Filtration
Cellulose Fiber Filtration
Engine Driven pumps are typically _____.
Rotary Vane or Spur Gear type pumps.
Bypass valves allow for fuel flow from the ____.
auxiliary electric pumps
(True or False)
Pumps are not required for fuel injected turbine engines.
False, fuel pumps are required for fuel injected engines.
Pumps that allow of liquid to move through vanes using rpm to increase pressure.
Rotary Vane Pumps.
pumps that move a quantity of liquid using spur gears.
Spur Gear Pump
Engine Driven pumps are usually of which two types?
Rotary Vane and Spur Gear
Auxiliary pumps are usually of which three major types?
Wobble, Pulsating Electric, and Centrifugal.
(True or False)
Auxiliary pumps are constant displacement pumps.
False, auxiliary pumps are VARIABLE displacement pumps.
This pump is usually driven at a constant speed and moves fuel using an impeller.
Centrifugal pump.
This pump is typically mounted near or own the firewall. usually uses a solenoid and a plunger to move fuel.
Pulsating electric pump.
This pump is used to ensure all fuel in the tank is removed. uses a venturis located in low laying spots.
Transfer Ejector pump, or Jet pump.
Fuel heaters in a jet engine heat fuel by?
Using oil or bleed air to heat fuel.
