A 320 Electrical System

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Electrical Quizzes & Trivia

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Questions and Answers
  • 1. 

    What is the minimum voltage when conducting a BATTERY CHECK

    • A.

      Less than 60 amps in 10 seconds.

    • B.

      Greater than 34 volts.

    • C.

      Greater than 25 volts.

    Correct Answer
    C. Greater than 25 volts.
    Explanation
    The minimum voltage when conducting a BATTERY CHECK should be greater than 25 volts. This implies that the battery should have a voltage level higher than 25 volts in order to pass the battery check.

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  • 2. 

    A battery fail light will illuminate when :

    • A.

      Battery charging current increases at an abnormal rate .

    • B.

      Battery voltage drops below a predeterminate level.

    • C.

      The batteries have auto disconnected due to low voltage.

    Correct Answer
    A. Battery charging current increases at an abnormal rate .
    Explanation
    The battery fail light will illuminate when the battery charging current increases at an abnormal rate. This means that the rate at which the battery is being charged is not within the normal range, indicating a potential issue with the charging system. This could be caused by a malfunctioning charger or a problem with the battery itself. It is important to address this issue promptly to prevent further damage to the battery or the electrical system.

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  • 3. 

    What is the priority of electrical sources ?

    • A.

      APU , External power , Gen 1 or Gen 2 .

    • B.

      APU ,Gen 2 or 1, External power

    • C.

      Gen 1 or Gen 2, External power (if selected ) , APU .

    Correct Answer
    C. Gen 1 or Gen 2, External power (if selected ) , APU .
    Explanation
    The correct answer is Gen 1 or Gen 2, External power (if selected), APU. This means that the priority of electrical sources is first given to the generators (Gen 1 or Gen 2), then to external power if it is selected, and finally to the APU (Auxiliary Power Unit).

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  • 4. 

    Eng 1 has just been started and the APU is inoperative . The EXT PWR push button blue ON light is illuminated .Which of the statements bellow is correct ?

    • A.

      External power is supplying all electrical needs.

    • B.

      Eng Gen 1 is supplying Ac bus 1 and the downstream system and AC bus 2 through the bus tie contractors.

    • C.

      Gen 1 supplies AC bus 1 and (generally )the downstream system , Ext Pwr supplies AC bus 2.

    Correct Answer
    C. Gen 1 supplies AC bus 1 and (generally )the downstream system , Ext Pwr supplies AC bus 2.
    Explanation
    The correct answer is that Gen 1 supplies AC bus 1 and (generally) the downstream system, while Ext Pwr supplies AC bus 2. This means that the engine generator 1 is providing power to AC bus 1 and the downstream system, while external power is supplying AC bus 2. The fact that the EXT PWR push button blue ON light is illuminated indicates that external power is being used to supply AC bus 2.

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  • 5. 

    I f EXTERNAL power is available and within limits :

    • A.

      It will automatically close the Bus Tie contractors when connected by the ground crew.

    • B.

      The green AVAIL light will illuminate on the EXT PWR button.

    • C.

      The BUS TIE push button illuminates .

    Correct Answer
    B. The green AVAIL light will illuminate on the EXT PWR button.
    Explanation
    When external power is available and within limits, the green AVAIL light will illuminate on the EXT PWR button. This indicates that the external power source is connected and ready to be used. The BUS TIE push button illuminates to indicate that the bus tie contractors have automatically closed, allowing power to flow between the different bus systems.

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  • 6. 

    If during a normal flight the Bus Tie push button is depressed to OFF , what effect would this have on power to the busses ?

    • A.

      The power transfer would switch to the opposite bus.

    • B.

      All power would be lost and the aircraft would be powered by the batteries until the RAT was up to speed.

    • C.

      None

    Correct Answer
    C. None
    Explanation
    If the Bus Tie push button is depressed to OFF during a normal flight, it would have no effect on power to the busses.

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  • 7. 

    Is it posible to parallel generators

    • A.

      Yes.

    • B.

      Only with the RAT deployed.

    • C.

      The electrical system will not allow paralleling of generators.

    Correct Answer
    C. The electrical system will not allow paralleling of generators.
  • 8. 

    If both engine generators are powering the system and one subsequently fails ,are any busses unpowered ?

    • A.

      No , but some loads are shed in both main galleys .

    • B.

      Only the AC ESS shed bus .

    • C.

      None of the above .

    Correct Answer
    A. No , but some loads are shed in both main galleys .
    Explanation
    When both engine generators are powering the system and one of them fails, the system does not experience a complete loss of power. However, to compensate for the loss of one generator, some loads are shed in both main galleys. This means that certain electrical loads are temporarily disconnected or turned off to ensure that the remaining generator can handle the power demand without overloading. Therefore, while no buses are left unpowered, there is a reduction in the overall load to maintain system stability.

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  • 9. 

    What would cause the GALLEY fault light illuminate ?

    • A.

      The flight attendants have all the coffee makers and ovens on at once .

    • B.

      The Main Galley has shed.

    • C.

      The load on any generator is above 100% of it´s rated output.

    Correct Answer
    C. The load on any generator is above 100% of it´s rated output.
    Explanation
    When the load on any generator exceeds its rated output of 100%, it can cause the GALLEY fault light to illuminate. This indicates that there is an issue with the galley system, most likely due to the excessive load on the generator.

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  • 10. 

    Is it posible to determine the source of power for the Aircraft busses ?

    • A.

      NO

    • B.

      Only when operating in the Emergency Electrical Configuration.

    • C.

      Yes , press the ECAM ELEC , push button and view the electrical schematic on the ECAM .

    Correct Answer
    C. Yes , press the ECAM ELEC , push button and view the electrical schematic on the ECAM .
    Explanation
    The correct answer is Yes, press the ECAM ELEC, push button and view the electrical schematic on the ECAM. This suggests that it is possible to determine the source of power for the Aircraft busses by pressing the ECAM ELEC button and viewing the electrical schematic on the ECAM.

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  • 11. 

    If the source of power for the ESS AC bus is lost , does another source of power automatically power the bus ?

    • A.

      Yes , transfer is automatic .

    • B.

      Yes, only if AUTO was selected on the AC ESS FEED push button.

    • C.

      No this must be done by the crew .

    Correct Answer
    C. No this must be done by the crew .
  • 12. 

    Are there any limitations associated with disconnecting an IDG ?

    • A.

      Never disconnect an IDG in flight or push the IDG disconnect push button for more then 30 seconds.

    • B.

      Never disconnect an IDG in flight or push the IDG disconnect push button for more then 5 seconds.

    • C.

      Never disconnect an IDG unless the engine is running , nor push the IDG isconnect push button for more then 3 seconds.

    Correct Answer
    C. Never disconnect an IDG unless the engine is running , nor push the IDG isconnect push button for more then 3 seconds.
    Explanation
    Disconnecting an IDG (Integrated Drive Generator) should only be done when the engine is running, and the IDG disconnect push button should not be pushed for more than 3 seconds. This is because disconnecting the IDG in flight or for an extended period of time can lead to loss of power generation, which can affect the aircraft's electrical systems and potentially cause a hazardous situation. Therefore, it is important to follow the specified limitations to ensure the safe operation of the IDG.

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  • 13. 

    Can you reconnect an IDG in flight ?

    • A.

      Yes , but only after contacting maintenance control .

    • B.

      Yes , push and hold the IDG pb until the GEN fault light is no longer illuminated .

    • C.

      NO

    Correct Answer
    C. NO
    Explanation
    Reconnecting an IDG (Integrated Drive Generator) in flight is not possible.

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  • 14. 

    During routing flight , which of the following would result after the loss of Gen 2 and the subsequence star of the APU ?

    • A.

      All systems return to normal and the RAT must be restored .

    • B.

      The APU would now power both sides of the electrical system.

    • C.

      Eng gen 1continues to power AC bus 1 and downstream systems . The APU powers AC bus 2 and downstream systems.

    Correct Answer
    C. Eng gen 1continues to power AC bus 1 and downstream systems . The APU powers AC bus 2 and downstream systems.
    Explanation
    After the loss of Gen 2 and the subsequent start of the APU, Eng gen 1 will continue to power AC bus 1 and downstream systems. The APU will power AC bus 2 and downstream systems. This means that the electrical system will be divided between the two power sources, with each powering a different bus and its associated systems. The RAT (Ram Air Turbine) will need to be restored to ensure normal operation of all systems.

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  • 15. 

    What is the function of the APU GEN push button located on the over head electrical panel ?

    • A.

      Push this button to automatically start the APU

    • B.

      When selected to OFF the APU generator field is de_energized.

    • C.

      Both A and B are correct.

    Correct Answer
    B. When selected to OFF the APU generator field is de_energized.
    Explanation
    The APU GEN push button is located on the overhead electrical panel and its function is to de-energize the APU generator field when selected to OFF. This means that when the button is pushed and set to OFF, the APU generator will stop supplying electrical power. This can be useful in situations where the APU is not needed or when maintenance work is being carried out on the generator.

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  • 16. 

    When does the RAT automatically deploy ?

    • A.

      Electrical power to both AC BUS 1 and 2 is lost and the aircraft speed 100 knots

    • B.

      With the loss of two Hydraulic systems.

    • C.

      A or B

    Correct Answer
    A. Electrical power to both AC BUS 1 and 2 is lost and the aircraft speed 100 knots
    Explanation
    The RAT (Ram Air Turbine) automatically deploys when both AC BUS 1 and 2 lose electrical power and the aircraft speed is at or below 100 knots. Additionally, the loss of two hydraulic systems may also trigger the automatic deployment of the RAT.

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  • 17. 

    When will the RAT and EMER GEN red FAULT light illuminate ?

    • A.

      When the EMER GEN is not supplying electrical power ,AC busses 1 and 2 are unpowered and the nose gear is up

    • B.

      When the RAT is displayed using hydraulic RAT MAN ON push button .

    • C.

      Both A and B are correct

    Correct Answer
    A. When the EMER GEN is not supplying electrical power ,AC busses 1 and 2 are unpowered and the nose gear is up
    Explanation
    When the EMER GEN is not supplying electrical power, AC busses 1 and 2 are unpowered, and the nose gear is up, the RAT and EMER GEN red FAULT light will illuminate.

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  • 18. 

    If Batteries are the only source of power in flight , how long will battery power be available ?

    • A.

      Between 22 and 30 minutes depending on equipment in use .

    • B.

      Until the APU IS STARTED

    • C.

      TWO HOURS AND 30 MINUTES DEPENDENT ON THE EQUIPMENT IN USE

    Correct Answer
    A. Between 22 and 30 minutes depending on equipment in use .
    Explanation
    The correct answer states that the battery power will be available between 22 and 30 minutes, depending on the equipment in use. This suggests that the duration of battery power in flight is limited and can vary based on the power consumption of different equipment.

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  • 19. 

    Which busses Will be powered after the RAT is extended and the EMER GEN begins producían grandes power ?

    • A.

      BATT HOT busses Will be power ESS DC , ESS DC SHED ,ESS AC ,and ESS AC SHED 

    • B.

      The BATTERIES busses would power Booth HOT BATT busses , ESS DC and ESS AC through the STATIC INVERTER 

    • C.

      The STATIC INVERTER would power Both HOT BATT busses ESS DC and ESS AC through the ESS AC SHED busses.

    Correct Answer
    A. BATT HOT busses Will be power ESS DC , ESS DC SHED ,ESS AC ,and ESS AC SHED 
  • 20. 

    Which comunicación and navegation radios are operational in the EMERGENCY ELECTRICAL CONFIGURATION, with the EMER GEN powering the sistem ?

    • A.

      VHF 1 ,RMP 1 VOR 1

    • B.

      ACP 1 ,& ACP 2  ,VHF 1 ,HF1 , RMP 1 ,VOR 1 and ILS 1.

    • C.

       RMP 1&2 ,VHF 1 , HF , ACP 1 ,VOR ,ILS 1

    Correct Answer
    B. ACP 1 ,& ACP 2  ,VHF 1 ,HF1 , RMP 1 ,VOR 1 and ILS 1.
    Explanation
    In the EMERGENCY ELECTRICAL CONFIGURATION, with the EMER GEN powering the system, the operational communication and navigation radios are ACP 1, ACP 2, VHF 1, HF1, RMP 1, VOR 1, and ILS 1.

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  • 21. 

    While operating in EMERGENCY ELEC Power ( EMER  GEN powering the system ) What shoud the CREW accompljish prior to lowering the landing gear ?

    • A.

      Check to see that FMGC has auto tuned the appropiate NAV facility for the approach to be accomplish.

    • B.

      Depress the guarded RMP NAV puso button and tune the aprópiate NAV facility and Course for the aproach to be acomplish.

    • C.

      A & B 

    Correct Answer
    B. Depress the guarded RMP NAV puso button and tune the aprópiate NAV facility and Course for the aproach to be acomplish.
    Explanation
    The crew should depress the guarded RMP NAV push button and tune the appropriate NAV facility and course for the approach to be accomplished. This is necessary in order to ensure that the navigation system is properly set up for the approach and that the aircraft will be able to navigate to the correct destination.

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  • 22. 

    Which Flight control computer Will be inoperative with gear extension while in the Emergency. ELECTRICAL CONFIGURATION ?

    • A.

      SEC 1

    • B.

      FÁC 1 

    • C.

      ELAC 1

    Correct Answer
    B. FÁC 1 
    Explanation
    The Flight Augmentation Computer (FAC) 1 will be inoperative with gear extension while in the Emergency Electrical Configuration.

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  • 23. 

    Which radios are inoperative with gear extension while in the Emergency electrical configuration ?

    • A.

      DME , and Transponder 1.

    • B.

      DME 1, DDRMI and Transponder.

    • C.

      DME 1 and Transponder 1.

    Correct Answer
    C. DME 1 and Transponder 1.
    Explanation
    In the Emergency electrical configuration, DME 1 and Transponder 1 are inoperative with gear extension. This means that these radios cannot be used or operated when the gear is being extended.

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  • 24. 

    While operating on Emergency Electrical Power (EMER GEN powering the system ) How is it posible to properly complete the ECAM checklist only upper display ?

    • A.

      Depress and hold the specific ECAM page push button on the ECAM control panel.

    • B.

      Transfer occurs automatically.

    • C.

      This is not posible .Use the cockpit operating manual.

    Correct Answer
    A. Depress and hold the specific ECAM page push button on the ECAM control panel.
    Explanation
    When operating on Emergency Electrical Power (EMER GEN), it is possible to properly complete the ECAM checklist only on the upper display by depressing and holding the specific ECAM page push button on the ECAM control panel. This action triggers an automatic transfer of the checklist to the upper display, allowing the pilot to access and complete it. Using the cockpit operating manual or any other method is not necessary or applicable in this situation.

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  • 25. 

    Which flight control computers are operational in the Emergency electrical Power configuration (gear down and batteries powering the system ) ?

    • A.

      ELAC 1 , SEC 1 and FAC 1

    • B.

      ELAC 1 and 2 SEC 1 and 2 , FAC 1

    • C.

      ELAC 1 , and  SEC 1.

    Correct Answer
    C. ELAC 1 , and  SEC 1.
    Explanation
    In the Emergency electrical Power configuration with gear down and batteries powering the system, only ELAC 1 and SEC 1 flight control computers are operational. The other options, ELAC 1 and 2 SEC 1 and 2, and FAC 1, are not correct as they include additional flight control computers that are not operational in this specific configuration.

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  • 26. 

    Which condition will automatically illuminate the scape lights ?

    • A.

      DC ESS SHED bus not powered.

    • B.

      AC ESS SHED bus not powered.

    • C.

      Loss of power to the AC bus 1.

    Correct Answer
    A. DC ESS SHED bus not powered.
    Explanation
    The scape lights will automatically illuminate when the DC ESS SHED bus is not powered. This means that if there is a loss of power to the DC ESS SHED bus, the scape lights will turn on automatically.

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  • 27. 

    While operating on Emergency Electrical Power ( EMER GEN powering the system, FAC 1 reset ) which of the following control laws  are in effect ?

    • A.

      Alternate 

    • B.

      Manual

    • C.

      Backup.

    Correct Answer
    A. Alternate 
    Explanation
    When operating on Emergency Electrical Power (EMER GEN powering the system, FAC 1 reset), the control laws that are in effect are the Alternate control laws. This means that the system is being controlled by an alternate set of rules or regulations specifically designed for emergency situations. The Alternate control laws take over when the primary control laws are not available or not functioning properly.

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  • 28. 

    While operating on Emergency Electrical Power with the landing gear lowered which of the followings laws is in effect ?

    • A.

      Backup

    • B.

      Direct

    • C.

      Alternate

    Correct Answer
    B. Direct
    Explanation
    When operating on Emergency Electrical Power with the landing gear lowered, the law in effect is the "Direct" law. In this mode, the flight control system directly commands the control surfaces based on the pilot's input, without any assistance or augmentation. This law provides a direct and immediate response to the pilot's commands, ensuring that the aircraft can be controlled even in emergency situations when normal electrical power is unavailable.

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  • 29. 

    While operating on Emergency Electrical Power with the landing gear lowered which of the following statements is correct ?

    • A.

      If the APU is not operating it should be started at this time .

    • B.

      The APU will not start until the aircraft has come to a complete stop and all power has been removed for 15 seconds .

    • C.

      On the ground bellow 100 knots , the DC BATTERY BUS automatically reconnects to  the batteries allowing APU start.

    Correct Answer
    C. On the ground bellow 100 knots , the DC BATTERY BUS automatically reconnects to  the batteries allowing APU start.
  • 30. 

    What cockpit light is available during an emergency electrical situation ?

    • A.

      Emergency path lights only.

    • B.

      Right side Dome light , main panel flood lights ( left two columns only )and the stanby compass light .

    • C.

      Right side dome light , main panel flood lights and the stanby compass.

    Correct Answer
    B. Right side Dome light , main panel flood lights ( left two columns only )and the stanby compass light .
    Explanation
    During an emergency electrical situation, the cockpit light that is available is the right side dome light, main panel flood lights (left two columns only), and the standby compass light.

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  • 31. 

    On the cockpit overhead panel , there is a three positions EMERGENCY EXIT light switch.What lights are associated with this switch ?

    • A.

      Exit sign , emergency lights and scape path lighting .

    • B.

      Exit signs, emergemcy lights , main panel flood lights and escape path lights .

    • C.

      Exit signs , emergency lights , dome lights , main panel flood lights and the standby compass light .

    Correct Answer
    A. Exit sign , emergency lights and scape path lighting .
    Explanation
    The correct answer is "Exit sign, emergency lights, and scape path lighting." This means that when the EMERGENCY EXIT light switch is in any of its three positions, the associated lights that are activated or controlled by this switch are the exit sign, emergency lights, and scape path lighting.

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  • 32. 

    With the EMER EXIT LT selector in the ARM  position , which situation will active the emergency lights and exit lights ?

    • A.

      AC bus 1 unpowered.

    • B.

      AC shed bus unpowered .

    • C.

      DECESS SHED bus unpowered .

    Correct Answer
    A. AC bus 1 unpowered.
    Explanation
    When the EMER EXIT LT selector is in the ARM position, the emergency lights and exit lights will be activated if the AC bus 1 is unpowered. This means that if there is a loss of power to AC bus 1, the emergency and exit lights will automatically turn on to provide illumination in case of an emergency or evacuation. The other two situations mentioned, AC shed bus and DECESS SHED bus being unpowered, do not affect the activation of the emergency and exit lights.

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  • 33. 

    What is the significate of the circuit breakers on the overhead panel ?

    • A.

      They are not monitored by ECAM.

    • B.

      Can not be reset.

    • C.

      They may be operational in the Emergency Electrical Configuration .

    Correct Answer
    C. They may be operational in the Emergency Electrical Configuration .
    Explanation
    The circuit breakers on the overhead panel may be operational in the Emergency Electrical Configuration. This means that in the event of an emergency where the normal electrical systems fail, these circuit breakers can still provide power to essential systems. It is important to note that they are not monitored by ECAM, which means that their status and functionality need to be manually checked and monitored by the pilots. While they cannot be reset, they play a crucial role in ensuring the availability of electrical power during emergency situations.

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  • 34. 

    How many times can you reset a circuit breakers ?

    • A.

      Once

    • B.

      Once , if authorized by the procedure 

    • C.

      Twice

    Correct Answer
    B. Once , if authorized by the procedure 
    Explanation
    The correct answer is "Once, if authorized by the procedure". This means that typically, a circuit breaker can only be reset once. However, if there is a specific procedure in place and authorization is granted, it may be possible to reset it a second time. This implies that there are certain protocols and guidelines that need to be followed when resetting a circuit breaker, and it should not be done without proper authorization.

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  • 35. 

    What is the significance of the green collared circuit breakers ?

    • A.

      Green collared circuitbreakers are monitored by the ECAM

    • B.

      GREEN COLLARED CIRCUIT BREAKERS ARE PULLED WHEN flying on battery poer only

    • C.

      Green collared circuit breakers are not be reset.

    Correct Answer
    A. Green collared circuitbreakers are monitored by the ECAM
    Explanation
    Green collared circuit breakers are significant because they are monitored by the ECAM. This means that the ECAM system keeps track of the status and condition of these circuit breakers. Monitoring the circuit breakers is important for the overall safety and functionality of the electrical system in an aircraft. By being able to monitor the green collared circuit breakers, the ECAM can detect any faults or malfunctions in the electrical system and alert the crew to take appropriate action.

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  • 36. 

    What is the function of the GEN 1 LINE push button ?

    • A.

      When selected OFF the avionics compartment isolation valves close .

    • B.

      When selected OFF the 1 Generator powers all AC busses

    • C.

      When selected OFF generator 1 is removed from all busses but continues to power one fuel pump in each wing.

    Correct Answer
    C. When selected OFF generator 1 is removed from all busses but continues to power one fuel pump in each wing.
    Explanation
    The function of the GEN 1 LINE push button is to remove generator 1 from all buses but still continue to power one fuel pump in each wing. When the push button is selected to OFF, the generator is disconnected from all electrical systems but remains operational to provide power to the fuel pumps. This allows for the continued operation of the fuel pumps even if the generator is not supplying power to other systems.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jul 28, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 04, 2020
    Quiz Created by
    GECAVA
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