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Aircraft Refueling Knowledge Quiz
Test your knowledge on aircraft refueling systems with our comprehensive quiz! This quiz is designed for aviation enthusiasts, students, and professionals looking to sharpen their understanding of aircraft fuel management.
Key Features:
- 39 multiple choice questions.
- In-depth insights into fueling systems.
- Perfect for certification and training purposes.
This type of refueling is done by an external pump and hose into the wing tanks via over wing filler ports?
Pressure Refueling
Gravity Refueling
Both A & B
What type of refueling mode where in you must calculate the fuel distribution before refueling?
Automatic
Manual
Override
Fueling System of an aircraft consists of;
Pipes, valves, and controls
Pipes, valves, controls and indicators.
Pipes, valves, manifolds and indicators.
What type of refueling mode where in fuel Quantity Control Computer takes your block fuel pre-selection?
Manual Mode
Automatic Mode
Override Mode
When the refueling valve switch is in shut position, what is the position of the refueling valve?
Close
Temporary Close
Partially Close
When the refueling valve switch is in norm position, what is the position of the refueling valve?
Refueling valve is controlled by the automatic refueling logic.
Refueling valve is controlled by the automatic refueling logic provided the mode selector is in DEFUEL.
Refueling valve is controlled by the automatic refueling logic provided the mode selector is in REFUEL.
When does the refueling system is powered up.
As the panel door opens the switch is activated.
As the panel door closes the switch is activated.
As the panel door partially opens the switch is activated.
In case of System Failure in Automatic Mode;
Fuel Control Computer closes the refueling valves.
High Level Sensors closes the refueling valves.
Electronic Control Unit closes the refueling valves.
These sensors cut-off the opening signal to the respective refueling valve and cause it to close?
HI LVL Sensors
LO LV Sensors
MID LV Sensors
Where does the refueling control panel get its power when the power switch is in NORM position?
Normal Electrical Buses
Aircraft Battery
AC Busses
What is the indication that the special transfer valve required for defueling is open?
Blue Lights
X FEED Lights
AMBER Lights
When the refueling valve is open; Fuel enters the tank through what component?
Fuel Feed Manifold
Check Valves
Diffusers
In flight turbulences cause the manifold to bend up and down, to prevent this damage;
Manifold drain valves empty the refueling manifold when the fuel level in the tanks falls above the manifold.
Manifold drain valves empty the refueling manifold when the fuel level in the tanks falls below the manifold.
Manifold drain valves relief the refueling manifold when the fuel level in the tanks falls below the manifold.
Where can you find the refueling couplings?
Center Fuselage
Wings trailing edge
Inside Fueling Bay
In a Butterfly Type Check Valves; this pin stops the flap from flipping over.
Ground Pin
Stop Pin
Bypass Pin
In a Poppet Type Check Valve, what happens if pressure acts on spring?
Valve Partially Opens
Valve Opens
Valve Slowly Opens
How many refueling couplings B 737 has?
1
4
2
If there is no electrical power available or the valve doesn’t open electrically; You can open the refueling valves by means of?
An override plunger which you press to open the refueling valve.
An override screw which opens the refueling valve.
Both Answers are Correct
Where do you think the fuel should be on an aircraft during touchdown?
The fuel should be in the inner wing tanks.
The fuel should be in the outer wing tanks.
The fuel should be equally distributed in all 5 tanks.
The fuel should be in the center wing tanks.
When would you use override refueling mode?
This mode is used if you don’t have a pressure pump on the refueling truck.
If the calculation used for manual refueling turns out to be wrong.
When electrical power to the refueling valves is not available.
If something goes wrong with automatic refueling.
How can you gravity refuel the center tank?
Gravity refueling of a center tank is not possible.
By means of a center tank refilling port below the cabin floor panels.
By means of a center tank refilling port on the rear wall of the tank in the main landing gear wheel well.
By gravity fuel transfer from main tank no. 2 or 3 via openings in the ribs between center and wing tanks.
What is the task of fuel control computer in the automatic refueling mode?
It closes the refueling valves, if spill over occurs into the vent surge tank.
It calculates how much fuel is supplied by the fueling company.
It only serves the fuel quantity and indication system.
It compares actual and calculated fuel distribution and controls the refueling valves accordingly.
The main purpose of the fuel feed system is to supply fuel to all engines. Second, is the ability to isolate any engine. What is the third purpose of a typical fuel feed system?
To control the filling of tanks during refueling.
To control the order in which fuel tanks are emptied during flight.
To isolate the stabilizer tank.
To indicate the quantity of fuel in the tanks.
When is the fuel recirculation system activated?
Always if the engines are running on a low power setting and the IDG oil temperature is too low.
At take-off power setting to prevent engine oil overheating.
Only if the aircraft is on the ground.
Always if the engines are running on a low power setting and the IDG load is high.
How can you dump fuel from main tanks 1 and 4?
You cannot dump fuel from here, because main tanks 1 and 4 are not connected to the jettison manifold.
Via the refueling manifold across the manual defueling valves.
Via the jettison override pumps after being transferred to main tank’s 2 and 3 by the main tank transfer valves.
It can only be dumped by the standard boost pumps in main tanks 1 and 4.
What happens, if pilot selects the left nozzle valve switch to OFF during jettison operation?
Jettisoning is stopped.
Jettisoning takes faster, but still fuel from all tanks will be dumped.
Only the left-wing tank's will be jettisoned.
Jettisoning takes longer, but still fuel from all tanks will be dumped.
What is the purpose of the jettison system?
To balance the aircraft in flight.
To dump fuel quickly and safely in an emergency to prevent exceeding the maximum landing weight.
To empty reserve tanks before touchdown.
To empty all tanks before touchdown.
Why do you think the fuel quantity system in all larger aircraft measures and indicates a mass and not a volume?
Because of the different shape of the wing tank.
The maximum tank capacity also depends on the fuel weight.
Fuel weight accounts for up to 50% of the aircraft weight and must therefore be known accurately.
It is easier to measure a mass than a volume.
What happens to the stick reading if the aircraft is not standing on level ground?
The stick reading on the inner indicator is higher when the wing is high.
The stick reading does not change, because the amount of fuel in the tank remains the same.
The stick reading on the inner indicator is higher when the wing is low.
Where can you find inclinometers other than in the main landing gear wheel well?
In the nose wheel well.
In the cockpit.
In the main galley.
Fuel leaks can occur anytime. Why do you have to add a binding agent to the spilled fuel?
To make the fuel spillage visible to personnel to avoid accidents.
To reduce the smell.
To bond the fuel and to eliminate the build-up of flammable fuel vapor.
Working in fuel tank use a special tool which do not create sparks. Why are they called explosion proof tools?
The tools are specially treated, so they can never explode or ignite.
These tools are tough and would survive an explosion.
These tools cannot create sparks when in contact with metal or they have special design features.
Why do you think two or more people are required during maintenance in a tank?
One man needs to be in the tank and the other one must be outside, so they chat what is happening.
The man inside the fuel tank must be always observed in case he becomes ill or claustrophobic.
One man needs to be in the tank and the other one must be outside to hand in the tools and equipment.
How is a safety area at the gate normally indicated?
By colored floor markings on the ground.
By signal lights and warning signs.
It is not marked, because the entire gate area is always the safety area.
By non- smoking signs, safety ropes and barriers.
Why do you have to wear special tank access clothes when you work inside a fuel tank?
The clothes are made of cotton so that they cannot create any electric static sparks.
The clothes are fuel tight, so that fuel cannot soak through the dress and touch your skin.
The clothes have signal colors so that you can be easily found in a tank in case of an emergency.
The clothes have a special anti-skid coating to prevent accidents in slippery tanks.
When are you allowed to enter a fuel tank without a respirator or a full-face mask?
You must always wear a respirator or a full-face mask when working in a fuel tank.
If you do not smell fuel, you may enter tank without a respirator.
You may enter the tank only, if the tank is health safe as indicated by gas measuring equipment.
You may enter the tank at any time if you are monitored by a colleague.
Fire prevention is elimination of sources which create or support fire. Which one of the three sources can be most easily eliminated?
Heat sources.
Inflammable vapor.
Oxygen.
How many measuring sticks are required to back up the electrical indication system?
Two sticks per tank.
One stick per tank.
The number of measuring sticks in a tank varies with its shape.
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