Fuel Systems Flashcards
Is there any reason why a fuel jettison system might be required on a small aircraft
Yes, if the maximum takeoff weight exceeds the maximum allowable landing weight
What are some other names for a single point fueling system
An underwing or pressure fueling system
The fuel selector valve from multi-engine aircraft must have at least three positions. What are they?
ON, OFF and Crossfeed
Why do some fuel tanks have internal baffles
To prevent fuel surging from changes in the aircraft altitude
What are the two types of fuel cells
Wet wing and bladder type
What does the term wet wing mean
Part of a wing structure that is sealed and used as a fuel tank
How is the weight of the fuel supported when bladder type fuel cells are used
Supported by the aircraft structure
Why do turbine engine aircraft have fuel temperature indicating systems
To determine if the fuel is cold enough to produce ice
Name four types of fuel quantity gauging systems currently in use
Sight gauges, mechanical, electrical, and electronic gauges
Why are electronic fuel quantity indicating systems more accurate than other types
They measure the mass of the fuel instead of the volume
What are drip gauges and sight gauges
An underwing,fuel gauge used to check the fuel level in the tank
What is the purpose of an in-transit light associated with electrically operated fuel tank shutoff valve
Tells that the valve is moving between one position and another
For what reason is a fuel jettison system usually divided into two separate independent systems one for each wing
Maintain lateral stability
What procedures should be followed regarding gasket and seals when replacing fuel system components
All old gaskets and seals should be replaced with new ones
How is a tank checked for leaks followed a patch or welding repair
tank is pressurized using air pressure and liquid soap
Name some advantages of a single-point fueling system
reduces fueling time, contamination, fire, and eliminates damage to the aircraft skin
Why should you wait for a period of time after fueling an aircraft before checking the fuel sumps
allow water and contaminants to settle to the drain point
Why do some aircraft have fuel jettison systems
To reduce the weight of the aircraft to the maximum allowable landing weight
Is it possible for fuel systems to develop a leak that has no visible evidence such as a stain or spot and if so how
Yes a internal component such as a valve could could develop a leak
What is the purpose of warning lights in connection with fuel systems
indicates when the fuel pressure is too low or when the fuel quantity in a tank is below a certain amount
What is a Crossfeed system
Interconnected system designed to fed fuel from any tank to any engine
Which type of fuel quantity gauge is considered to be more accurate than the other types
The electronic capacitance type because it measures in weight
Where are fuel systems strainers located
One located in the outlet to the tank.
The main strainer is located in the fuel line between the outlet of the fuel tank and the inlet to the fuel metering device
What must be done after a fuel system strainer has been cleaned or replaced
system must be tested for leaks by pressurizing the system
What color is grade 100LL fuel
Blue
