Vol.3 Flashcards
(37 cards)
What is usually located at the lowest point in a fuel tank?
Sump and drain
Why does a bladder-type tank conform to the shape of the vacant cavity within the fuselage?
Because it is made out of a rubber or nylon material
What are wing tanks?
Sealed-off parts of the wing structure
What may a centrifugal-type air fuel pump be used for?
Boost, transfer, or air refueling operations
What type of fuel pump must have a fuel and vapor proof housing?
Centrifugal pump with electrically driven, DC, series-wound motor
What kind of centrifugal pump is used when a fuel supply is required during periods of negative gravity conditions?
Dual-impeller
In a dual-impeller fuel pump, what prevents foreign objects from holding the bypass valve open?
An inlet screen
What air refueling pump components depend on fuel for lubrication?
Bearings
What air refueling pump component removes fuel vapors caused by the centrifugal force of the impellers?
rotor
What does the arrow stamped on the body of a fuel system check valve indicate?
direction of free flow
When is a pressure-loaded fuel system check valve used?
When gravity flow through the valve is undesirable
What are the fuel system components that prevent excessive pressure from building up in trapped lines or within the valve body?
three spring-loaded relief valves
The rotary plug valve can be removed and replaced without what?
Draining the fuel lines or tanks
What rotary plug valve part rotates and seals off the passage of fuel during plug valve removal?
Secondary seal sleeve
What is another name for the disc-type valve in a fuel system?
butterfly
In a piston-type fuel level control valve, what aids piston closure and prevents fuel from entering the tank?
Spring
Why do some fuel level control valves have a dual-float system?
So that there will be a double safety factor
The low-level shutoff valve prevents the reverse flow of fuel through the valve by what type of action?
Check valve
What do fuel-controlled circuits normally indicate?
Fuel flow, fuel level, and fuel pressure
What most likely controls the automatic pump shutoff when all fuel is depleted from a fuel tank?
Float switches
In a DC, liquid-level , fuel indicating system, what positions the wiper contact on the resistance strip?
The movement of a float in the tanks
What capacitance-type, fuel-indicating system component allows for changes in fuel density?
Compensator
What prevents a fuel tank from collapsing if an air pressure regulator fails and excessive negative pressure develops?
Pressure/vacuum relief valve
What will a well-designed aircraft fuel system ensure?
Positive and reliable fuel-flow under all conditions
