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WorksheetsA350
Total questions: 52
Worksheet time: 26mins
Transfer Pumps is a type of?
Electrical fuel booster pumps
Jet pumps (ejector pumps)
Electrical pump
Small scavenge / electrical pumps
Surge Protection Valves’ purpose is ....
Prevent fuel surges or sloshing
Allow fuel to flow in one direction only
Allow fuel transfer between tanks
Manage air pressure inside tanks
What is the approximate total fuel volume capacity of the aircraft?
42,000 US Gal
26,400 US Gal
7,800 US Gal
50,900 US Gal
What is the specific density of fuel under normal conditions?
0.785 kg/l
0.893 kg/l
6.551 lb/US Gal
7.452 lb/US Gal
Where is the Engine Feed Pump is located?
Centre Fuel tank
Lowest point of inner tanks
Inner Wing Tanks
Vent surge tanks
Why does each wing tank contain a collector cell?
To increase overall fuel capacity
To prevent fuel freezing in cold temperatures
To keep fuel pump inlets immersed and provide negative “g” protection
To balance fuel weight distribution
Which has the purpose of remove excess fuel from vent surge tanks and return it to the main tanks?
Refuel/Defuel Pumps
Centre Tank Pumps
Scavenge Pumps
Vent Surge Tank Pumps
Which valve allows fuel to flow in only one direction, preventing backflow?
Fuel Transfer Valve
Fuel ShutoƯ Valve
Non-Return Valve (Check Valve)
Surge Protection Valve
What is the primary purpose of a fuel shutoƯ valve?
Balance fuel distribution between tanks
Isolate fuel flow in emergencies or maintenance
Prevent excessive pressure buildup in tanks
Control fuel surges during flight
Which valve prevents excessive pressure buildup inside fuel tanks?
Vent Valve
Pressure Relief Valve
Surge Protection Valve
Refuel/Defuel Valve
What is controlled via the Fuel Control and Monitoring System (FCMS)?
Fuel Transfer Valve
Refuel/Defuel Valve
Non-Return Valve
Pressure Relief Valve
What is the approximate weight of fuel in the center tank under normal conditions?
50,900 lb
172,900 lb
196,700 lb
274,800 lb
Which is the correct characteristic of an APU Feed Pump?
Type: Jet Pump, Location: Right inner wing tank
Type: Electrical Pump, Location: The centre fuel tank
Type: Electrical Pump, Location: Right inner wing tank
Type: Jet Pump, Location: The centre fuel tank
What is the pressure range of the engine feed system?
25-50 psi
10-20 psi
55-100 psi
120-200 psi
What is the pressure range of a high-pressure fuel line?
1000-2000 psi
3000-6000 psi
6500- 9000 psi
9000+ psi
What valves is responsible for the Fuel Metering System operation?
Pressure Drop & Spill Valve
Fuel Metering Valve
HP Fuel Shut OƯ Valve
All of the above
What is the purpose of the Fuel Scavenge System in the A350?
To remove contaminants from the fuel
To transfer unusable fuel from low points in the tank to the main usable fuel supply
To increase fuel tank capacity
To balance the fuel between wing tanks
Which component ensures fuel is delivered under the required pressure to the engines?
Non-return valve
Fuel shutoƯ valve
Fuel boost pump
Crossfeed valve
What is the main function of the Refuel/Defuel Valve in the A350?
To balance fuel distribution between tanks
To allow the transfer of fuel from one wing tank to another
To allow controlled refueling and defueling operations
To prevent over-pressurization of the tanks
How does the A350 prevent fuel freezing at high altitudes?
By heating fuel using the engine oil system
By mixing fuel with anti-freeze additives
By using a dedicated fuel heater in each tank
By continuously circulating fuel through the wing tanks
What is the main function of the fuel inerting system in the A350?
To increase fuel efficiency
To reduce the risk of fuel tank explosions by replacing oxygen with nitrogen
To transfer excess fuel to auxiliary tanks
To regulate fuel temperature
Which component prevents excessive fuel sloshing inside the tanks during turbulence?
Surge protection valve
Baƫle plates
Non-return valve
Fuel boost pump
Why does the A350 have a fuel recirculation system?
To cool the engine oil and prevent fuel freezing
To remove contaminants from the fuel before reaching the engines
To mix fuel additives for better combustion
To balance fuel levels between left and right tanks
What is the purpose of the fuel vent surge tanks?
To collect excess fuel during refueling and prevent spillage
To store emergency fuel reserves
To increase the aircraft's total fuel capacity
To filter impurities before fuel enters the main tanks
Figure 25 shows a yellow arrow pointing at a symbol of the A350’s fuel system located at the center tank. What does the symbol mean?
Crossfeed valve
Centre Tank Inlet Valve
Fuel Scavenge Valve
Main pump
What is the primary function of the Crossfeed Valve in the Airbus A350 fuel system?
To transfer fuel from the center tank to the wing tanks
To allow fuel balancing between the left and right wing tanks
To regulate fuel pressure from the engine fuel pumps
To automatically shut off fuel supply in case of a fuel leak
Where is the Crossfeed Valve located in the A350 fuel system?
Between the center tank and wing tanks
Between the left and right wing tanks
Inside each engine fuel pump
At the refueling station
How is the Crossfeed Valve controlled in the A350?
Automatically by the fuel management system and manually via the cockpit
Only manually by the pilots
Only automatically without pilot input
By ground crew during refueling
What happens if the Crossfeed Valve fails in the closed position?
Fuel imbalance may occur between the left and right tanks
Both engines will shut down
The aircraft will be unable to refuel
The center tank will drain first before the wing tanks
What is approximately total fuel volume in all tanks combined?
160800L
140000L
168000L
158800L
How much fuel can each wing tank hold in terms of volume?
99900L
90800L
95000L
96100L
Which value is responsible for managing air pressure inside fuel tanks to prevent over-presurization?
Vent valve
Fuel shutoff valve
Refuel/defuel valve
Surge protection valve
How does the cockpit display fuel system status?
Through ECAM (Electronic Centralized Aircraft Monitoring) system
Fuel Quantity Indicator
Fuel Crossfeed
Fuel Flow Indicators
Why does the A350 use a vent system for its fuel tank?
Pump fuel from tank to engine
Cool the fuel
Equalize pressure and prevent damage
Filtering impurities
What happened if a fuel imbalance is detected?
System alert to pilot
Engine shut down
No impact on flight
Aircraft will dump the extra fuel
What is purpose of Fuel Jettison?
Increase fuel efficiency during flight
Fuel transfer
Reduce aircraft weight for emergency landing
Spare extra fuel
What is the main purpose of fuel system in A350?
to store and supply fuel to engines
provide power source for engines
supply electric power
increase speed of aircraft
What is the main fuel tank the A350 have?
side tank
top tank
center tank
bottom tank
How does fuel reach the engines?
valves
boost pumps
nozzle
automatic
How is a fuel leak detected?
technicians
boost pumps
valves
sensors
What is the primary purpose of the APU feed pump in an aircraft?
To transfer fuel from the wings to the center tank
To transfer remaining fuel from low points in the tanks to maximize fuel usage
To cool the fuel before it reaches the engines
To supply fuel to the main engines during takeoff
Which of the following is true about the fuel transfer lines that move fuel from outer to inner tanks?
They rely on electrical pumps to transfer fuel
The pressure range is between 20-30 PSI
They use jet (ejector) pumps that rely on motive flow rather than electrical power
They require high pressure to maintain fuel movement
Where are the main fuel supply lines (engine feed system) located in the Airbus A350?
Between the center fuselage and the tail
From the fuel tanks in the wings to the engines on the wings
From the fuselage to the horizontal stabilizer
Between the cargo holds and the cockpit
Which of the following is true regarding the high-pressure fuel lines in the engine supply and injection system?
The pressure range is between 1000-2000 psi
The high-pressure fuel pumps are driven by the aircraft's APU
The high-pressure fuel lines use rigid stainless steel tubing
Pressure is generated by engine-driven low-pressure fuel pumps
Why do we need to lower the pressure inside the fuel lines?
To prevent it from bursting
To prolong the usage of the fuel lines
To prevent fuel leaks caused by overpressure
All of the above
Why is the figure above important in fuel system?
Used as decoration
To filter contaminants from fuel
It can enhance the fuel efficiency
It can increase the fuel pressure
What would happen to the aircraft if it does not have a fuel filter?
The aircraft would consume less fuel and increase efficiency
Contaminants could enter the fuel system thus leading to engine damage or failure
Corrosion can be prevented
The engine would run smoother due to unrestricted fuel flow
Why do aircraft need to have a fuel jettison function?
To increase fuel efficiency during flight
To improve engine performance during long flight
To quickly reduce weight for a safe landing in emergency situations
To balance fuel distribution between tanks automatically
What is the pressure range for the scavenge and vent system?
10–50 psi
25–50 psi
5–15 psi
Near 0 psi
Where are the refuel/defuel lines located?
Between outer wing tanks and inner wing tanks
From the refueling ports to the fuel tanks
From inner wing tanks to the engines
From the lowest points of tanks
What supplies fuel in the engine feed system?
Jet pumps
Gravity flow
Electric booster pumps
Manual pumps
What type of pumps are used in the transfer lines?
Electric pumps
Manual pumps
Jet (ejector) pumps
Hydraulic pumps
