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Flashcards in Fuel Systems Deck (25):

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