fuel system review
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-Boost pumps in the fuel system operate during take off?
Provide positive flow to the engine
-for a gravity feed fuel system what is the flow
150% of take off fuel consumption
-for a pressure feed fuel system what is the flow
125% of take off fuel consumption
-whats the purpose of the bypass valve?
- Prevent the pump from blocking the fuel flow if the pump is
- not working
-Most aircraft recprioctaing engines are equpied with which
type of engine driven fuel pump?
-Where would the main fuel strainer be located?
Lowest point of the fuel system
-What would be the best remedy for an obstructed carburetor
Remove and clean the carburetor fuel strainer
-what may be the result of excessive priming?
After fire or back fire
-how much fuel must be supplied to the engine by a pump fed
fuel system and what is the reference?
125% FAR 23-955
-What must first be accomplished in order to operate an
electric fuel pump when starting a reciprocating aircraft engine?
Turn the master switch on
-when are the engine driven pumps working?
Whenever the engine is running
-a gravity feed fuel system will not function with out which
of the following?
Tank vent system
-on an aircraft with a gravity fuel system and more than one
tank with a common connection would require which of the following?
The tanks have to be vented to each other
-What could the use of a fuel boost pump at high altitude
- Boiling of the fuel at the pump at the engine driven pump
- causing cavitation and vapor lock
-what should be accomplished after maintenance involving
removal of components downstream of the fuel pump?
- Turn the boost pump
- on and check for leaks
-whats the primary advantage of an integral fuel tank?
Reduced weight, more fuel
-whats the purpose of baffle plates in a fuel tank?
Resist fuel surging
-which type of pump is commonly used as a fuel pump on
-what is a characteristic of a centrifugal type boost pump?
Separates the vapor from the fuel
-when is a pressure relief valve required?
Any time you have a positive displacement pump
-a rotary vane pump is best described as a?
Positive displacement pump
-what would be the remedy for an obstructed main fuel
- Remove and clean it or replace the main fuel strainer and
-the fuel system for aircraft certified in the standard
classification must include which if the following?
A positive means of shutting off fuel flow to all engines
-avgas contains hydrocarbons and microorganisms that can
Slime build up in the tank
-what is used to move fuel from one tank to another tank?
-pressure fed fuel system can operate the engine with?
-in the event of engine driven fuel pump failure during
- The boost pump will provide fuel to the engine through the
- bypass valve
-what is used to move fuel from any tank to any engine?
-what should be accomplished if a fuel line is leaking at a
Re-torque the fitting and do a leak check
-whats the purposed of the lead or lay lines on fuel hoses?
Ensure the line isn’t twisted
-Relief valves, if you turn the adjustment screw out what is
going to happen to fuel pressure?
-Relief valves, if you turn the adjustment screw in what is
going to happen to fuel pressure?
If you are routing fuel lines and electrical wire bundles
together how should they be positioned?
Wire bundle at least 6 inches above the fuel lines
-centrifugal fuel pumps are good because?
They separate fuel from the vapors
-what type of pumps are considered variable displacement?
Diaphragm and centrifugal
-what type of manual pump has been used as an emergency pump
to the engine driven fuel pump?
The wobble pump
-what is the function of baffles and poppet valves in fuel
Reduce fuel surging and reduce vapors
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