A320 ENGINEERING QUESTIONS AND ANSWERS
How many fuel tanks do you have in a A320/319 ? - Answer -5 tanks in total
Center tank, 2 inner wing tanks, 2 outter wing tanks.
How many fuel tanks do you have in an A321? - Answer -3 tanks
One center tank and two wing tanks.
How many fuel pumps do you get on the A320 CEO ? - Answer -6 booster pumps
2 per each wing inner tanks
2 for the center tanks
Both inner wing tanks and center tanks are engine feeding tanks
How does the APU get it's fuel? - Answer -the APU has its own booster pump, but if the
left side of the x-feed manifold is pressurized then it will not use this pump.
Whats the fuel tank usage hierarchy? - Answer -center tanks - wing inner till it reaches
low level - wing outer tanks.
Which valves are used to transfer fuel from outer tanks to inner tanks on the wing ? -
Answer -intercell transfer valves.
Which valves are used to transfer fuel from center tank to wing inner? - Answer -
transfer valves.
Main AP and FD functions - Answer -Stabilization around cofg
Acquisition and holding of flight path
Guidance after t/off
Automatic Landing & Go-Around
How does the fuel tank selection done based on the feeding hirachy? - Answer -this is
performed by the sequencing valve. And is an automatic operation.
When will the fuel LP valve be closed? - Answer -during engine shut down or if the
engine fire push-button is released out. Same applies for the APU.
How many ACT's can be optionally added to the A321 ? - Answer -two extra tanks can
be fitted as an option these will be in the cargo compartment.
When will the fuel from outer wing tanks be transferred into the inner wing tanks? -
Answer -when the fuel level in the inner tank goes to low level.
Can the cross bleed valve be used to transfer fuel from one tank to another? - Answer -
yes but this is only possible on ground.
,Can both engines be fueled using a single inner tank? - Answer -yes this is possible by
turning on the X feed valve.
In normal operations are the wing tank booster pumps automated ?. - Answer -no.
Wing tank booster pumps are always manual operation but the center tank pumps are
automatically controlled.
What are the engine feeding tanks on the A320 NEO? - Answer -inner wing tanks.
What are the engine feeding tanks for the A321 CEO?. - Answer -inner wing tanks.
What are the engine feeding tanks for A320 CEO?. - Answer -inner wing tanks and the
center tank.
How is the fuel transfered from center tank to inner wing tank? - Answer -using the the
jet pumps. These start working when the transfer valves are open.
What sort of communication transmission not advised during fueling and de fueling? -
Answer -HF transmission since this could cause an explosion.
Fire protection is done using two systems what are they? - Answer -fire detection
system
Fire extinguishing system
How many fire detection systems does the A320 have? - Answer -3, one for each
engine and one for the APU.
How many fire lips are available for an engine? - Answer -two Identical loops installed
in parallel. Each loop has 3 defying elements.
Where are the fire detection elements located? - Answer -engine pylon, engine core,
accessory gear box.
How many fire detection elements are found in the APU? - Answer -one element.
How many fire extinguishing bottles does engine have? - Answer -each engine has two
extinguishing bottles installed in the pylon. The APU gas only one installed forward if the
APU fire wall.
What happens if there's an APU firs while on ground? - Answer -APU will be
automatically switched off and the fire extinguisher discharged.
What does the fire for Panel test button do? - Answer -used to test on differ due
detection and extinguishing systems and sure they operate correctly. Also this will show
whether the extinguisher bottles are serviceable.
, How many fire detection elements are found in the CFM LEAP engines? - Answer -4
elements.
The cargo compartment smoke detection system is monitored by? - Answer -smoke
detection function of the CIDS.
How many smoke detectors are found on the A320 NEO? - Answer -two on each cargo
compartment FWD, AFT, AFT BULK.
How many extinguishing nozzles are found in the A320 ? - Answer -3 in total one for
each cargo compartment.
How many extinguishing nozzles are found in the A321 cargo compartment? - Answer -
5 in total
2 for forward cargo
2 for AFT cargo
1 AFT bulk cargo
What type of actuators are used in the penumatic system? - Answer -electro-pneumatic
actuators.
Pneumatic system is monitored by which computer? - Answer -this is done by 2 bleed
monitoring computers.
Pneumatic system bleeds air from ? - Answer -IP from HP4 during high engine RPM
and HP from HP10 via the HPV for low engine RPM.
What does the precooler do? - Answer -the precooler takes the hot bleed air extracted
for the HP compressor stage and cools is it down using air tapped off from the fan
section.
Where does the APU bleed are connected to? - Answer -to the left side of pneumatic
system.
What does the OHDS do? - Answer -it detects pneumatic leakages using the leak
detection loops. If leakage is detected the effected side is automatically isolated.
How many pneumatic leak detection loops does each pneumatic branch have? -
Answer -2 for the left side
2 for the right side
1 for the APU AFT section
1 per engine pylon for CEO and 2 Per Pylon for the NEO.
How many fuel tanks do you have in a A320/319 ? - Answer -5 tanks in total
Center tank, 2 inner wing tanks, 2 outter wing tanks.
How many fuel tanks do you have in an A321? - Answer -3 tanks
One center tank and two wing tanks.
How many fuel pumps do you get on the A320 CEO ? - Answer -6 booster pumps
2 per each wing inner tanks
2 for the center tanks
Both inner wing tanks and center tanks are engine feeding tanks
How does the APU get it's fuel? - Answer -the APU has its own booster pump, but if the
left side of the x-feed manifold is pressurized then it will not use this pump.
Whats the fuel tank usage hierarchy? - Answer -center tanks - wing inner till it reaches
low level - wing outer tanks.
Which valves are used to transfer fuel from outer tanks to inner tanks on the wing ? -
Answer -intercell transfer valves.
Which valves are used to transfer fuel from center tank to wing inner? - Answer -
transfer valves.
Main AP and FD functions - Answer -Stabilization around cofg
Acquisition and holding of flight path
Guidance after t/off
Automatic Landing & Go-Around
How does the fuel tank selection done based on the feeding hirachy? - Answer -this is
performed by the sequencing valve. And is an automatic operation.
When will the fuel LP valve be closed? - Answer -during engine shut down or if the
engine fire push-button is released out. Same applies for the APU.
How many ACT's can be optionally added to the A321 ? - Answer -two extra tanks can
be fitted as an option these will be in the cargo compartment.
When will the fuel from outer wing tanks be transferred into the inner wing tanks? -
Answer -when the fuel level in the inner tank goes to low level.
Can the cross bleed valve be used to transfer fuel from one tank to another? - Answer -
yes but this is only possible on ground.
,Can both engines be fueled using a single inner tank? - Answer -yes this is possible by
turning on the X feed valve.
In normal operations are the wing tank booster pumps automated ?. - Answer -no.
Wing tank booster pumps are always manual operation but the center tank pumps are
automatically controlled.
What are the engine feeding tanks on the A320 NEO? - Answer -inner wing tanks.
What are the engine feeding tanks for the A321 CEO?. - Answer -inner wing tanks.
What are the engine feeding tanks for A320 CEO?. - Answer -inner wing tanks and the
center tank.
How is the fuel transfered from center tank to inner wing tank? - Answer -using the the
jet pumps. These start working when the transfer valves are open.
What sort of communication transmission not advised during fueling and de fueling? -
Answer -HF transmission since this could cause an explosion.
Fire protection is done using two systems what are they? - Answer -fire detection
system
Fire extinguishing system
How many fire detection systems does the A320 have? - Answer -3, one for each
engine and one for the APU.
How many fire lips are available for an engine? - Answer -two Identical loops installed
in parallel. Each loop has 3 defying elements.
Where are the fire detection elements located? - Answer -engine pylon, engine core,
accessory gear box.
How many fire detection elements are found in the APU? - Answer -one element.
How many fire extinguishing bottles does engine have? - Answer -each engine has two
extinguishing bottles installed in the pylon. The APU gas only one installed forward if the
APU fire wall.
What happens if there's an APU firs while on ground? - Answer -APU will be
automatically switched off and the fire extinguisher discharged.
What does the fire for Panel test button do? - Answer -used to test on differ due
detection and extinguishing systems and sure they operate correctly. Also this will show
whether the extinguisher bottles are serviceable.
, How many fire detection elements are found in the CFM LEAP engines? - Answer -4
elements.
The cargo compartment smoke detection system is monitored by? - Answer -smoke
detection function of the CIDS.
How many smoke detectors are found on the A320 NEO? - Answer -two on each cargo
compartment FWD, AFT, AFT BULK.
How many extinguishing nozzles are found in the A320 ? - Answer -3 in total one for
each cargo compartment.
How many extinguishing nozzles are found in the A321 cargo compartment? - Answer -
5 in total
2 for forward cargo
2 for AFT cargo
1 AFT bulk cargo
What type of actuators are used in the penumatic system? - Answer -electro-pneumatic
actuators.
Pneumatic system is monitored by which computer? - Answer -this is done by 2 bleed
monitoring computers.
Pneumatic system bleeds air from ? - Answer -IP from HP4 during high engine RPM
and HP from HP10 via the HPV for low engine RPM.
What does the precooler do? - Answer -the precooler takes the hot bleed air extracted
for the HP compressor stage and cools is it down using air tapped off from the fan
section.
Where does the APU bleed are connected to? - Answer -to the left side of pneumatic
system.
What does the OHDS do? - Answer -it detects pneumatic leakages using the leak
detection loops. If leakage is detected the effected side is automatically isolated.
How many pneumatic leak detection loops does each pneumatic branch have? -
Answer -2 for the left side
2 for the right side
1 for the APU AFT section
1 per engine pylon for CEO and 2 Per Pylon for the NEO.
