Vayudoot Aviation

1. Which of the following AC busses can be powered by the emergency generator?

AC bus 1

AC ESS bus / AC ESS SHED bus

AC bus 2

2. When will the RAT & EMER GEN red FAULT light illuminate?

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

Both are correct.

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

3. During the five seconds it takes for the RAT to extend:

The BATTERIES power both BATT HOT busses.

The STATIC INVERTER powers both BATT HOT busses, ESS DC, and ESS AC through the ESS AC SHED busses.

The BATTERIES power both BATT HOT busses, ESS DC SHED, and ESS AC SHED through the STATIC INVERTER.

The BATTERIES power both BATT HOT busses, ESS DC, and ESS AC through the STATIC INVERTER.

4. While operating on Emergency Electrical Power with the landing gear lowered which of the following control laws is in effect?

Direct.

Backup

Backup or alternate

Alternate.

5. The APU is supplying the electrical system. What is the order of priority for the different generators?

APU, external power, engines.

APU, engines, external power.

External power, engines, APU.

Engines, external power, APU.

6. What is the function of APU GEN push button located on the overhead electrical panel?

Both are correct.

When selected to OFF the APU generator field is de-energized.

Push this button to automatically start the APU.

7. If normal electrical power is lost; essential cockpit lighting is maintained for the:

Standby compass

Right dome light (provided the dome selector is not off).

Captain’s instrument panel.

All of the above.

8. The emergency generator supplies power as long as:

The landing gear is down.

The RAT is deployed and the landing gear is down

The landing gear is up.

The RAT is deployed.

9. The IDG Fault light indicates:

IDG low oil pressure.

IDG has been disconnected

An IDG oil overheat

IDG low oil pressure or IDG oil overheat

10. An AC ESS FEED switch located on the overhead panel shifts the power source for the AC ESS bus from:

AC bus 2 to AC bus 1

AC bus 1 to AC Grnd/Flt bus

AC bus1 to AC bus 2

11. What cockpit lighting is available during an emergency electrical situation?

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

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

Emergency path lighting only.

Located on normal circuit breaker panels.

12. Are there any limitations associated with disconnecting an IDG?

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

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

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

There is no limitation

13. You enter a dark cockpit, what action is necessary before checking the battery voltages?

You have to ensure that at least one battery is on.

You have to ensure that both batteries are on.

You have to check that the external power is on.

You have to verify that both batteries are off.

14. Do not depress the IDG DISCONNECT switch for more than _______ to prevent damage to the disconnect mechanism.

7 seconds

10 seconds

3 seconds

15 seconds

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

When selected OFF the #1 generator powers all AC busses.

When selected OFF the avionics compartment isolation valves close.

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

16. The A-320 has _______ batteries in its main electrical system.

3 (4 when ETOPS capable)

2

1

3

17. The purpose of the AUTO BUS TIE is to allow either engine-driven IDG to automatically power both main AC buses in the event of a generator loss until either ground power or the APU generator is activated.

True

False

18. Is it possible to parallel generators?

Only one engine generator may be paralleled with the APU.

Only with the RAT deployed.

The electrical system will not allow “paralleling” of generators.

Of course yes.

19. The BAT FAULT light will illuminate when:

Battery voltage is low

Charging current decreases at an abnormal rate.

Charging current increases at an abnormal rate

20. What is the minimum voltage when conducting a BATTERY CHECK?

Greater than 24 volts.

Less than 60 amps in 10 seconds.

28 volts.

Greater than 25 volts.

21. During a routine flight, which of the following would result after the loss of Gen #2 and the subsequent start of the APU?

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

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

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

22. Having started the APU, how can you get the APU generator to power the electrical system?

You are unable to as the APU power output is outside normal parameters.

By pushing the EXT PWR pushbutton thus disconnecting the external power.

By pushing the BUS TIE pushbutton.

The APU generator must be switch on.

23. What is the significance of the green collared circuit breakers?

Green collared circuit breakers are AC powered.

Green collared circuit breakers are monitored by the ECAM.

Green collared circuit breakers are not to be reset.

Green collared circuit breakers are pulled when flying on battery power only.

24. The number 1 AC bus channel normally supplies power to _____ and to the _____ bus which supplies power to the ______ bus.

TR1 / AC ESS / AC ESS SHED

TR1 / AC ESS SHED / DC ESS

TR1 / AC ESS / DC ESS SHED

TR2 / AC ESS SHED / DC ESS SHED

25. The RAT is connected directly (mechanically) to the Emergency Generator

False

True

26. The normal priority for supplying electrical power to the AC busses is:

External power, APU, then engine generators

APU, external power then engine generators

Engine generators, external power then APU

External power, engine generators then APU

27. A battery fault light will illuminate when:

Battery voltage drops below a predetermined level.

Battery charging current increases at an abnormal rate.

The batteries have auto disconnected due to low voltage.

28. What is the significance of the circuit breakers on the overhead panel?

They may be operational in the Emergency Electrical Configuration.

They are mainly AC powered.

Cannot be reset.

They are not monitored by ECAM.

29. Which flight control computer will be inoperative with gear extension while in the Emergency Electrical Configuration?

SEC 1 and ELAC 1

FAC 1 and ELAC 1.

FAC 1

SEC 1

30. Which voltage requires recharging or replacing the batteries?

20 volts or less.

26 volts or less.

24 volts or less

25 volts or less.

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

Yes, those associated with the failed generator.

Only the AC ESS shed bus.

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

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

Exit signs, emergency lights, main panel flood lights, and escape path lighting.

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

Exit signs, emergency lights, and escape path lighting.

33. When does the RAT automatically deploy?

With the loss of two hydraulic systems.

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

Both are correct.

34. How many times can you reset a circuit breaker?

Twice, if authorized by the procedures.

Once, if authorized by the procedures.

Once.

Twice.

35. If the battery voltages are below the minimum, how do you charge them?

I have to switch the external power to ON and switch the batteries off.

I have to check that the BAT pushbuttons are on and switch the external power on.

You have to call a mechanic because the batteries can only be charged by maintenance.

I have to start the APU as the batteries can only be charged by the APU generator.

36. After landing, in the emergency electrical configuration: the batteries automatically connect to the DC BAT bus when speed decreases below _______ knots.

90

100

50

70

37. The engine generators and APU generator are rated at _____ KVA.

70

90

50

110

38. When no other power is available in flight, the static inverter converts _____ power to AC power for the ______ bus; and ______ powers the _______ bus.

BAT1 DC / AC ESS SHED / BAT2 / DC ESS SHED

BAT1 DC / AC ESS bus / BAT2 / DC ESS

BAT1 DC / AC ESS bus / DC ESS

BAT1 DC / AC ESS bus / BAT2 / DC ESS SHED

39. With the EMER EXIT LT selector in the ARM position, which situation will activate the emergency lights and exit signs?

AC SHED bus unpowered

DC bus #2 unpowered

DC ESS SHED bus unpowered

AC bus #1 unpowered

40. The BATTERY BUS is normally powered by:

DC BUS 1 and DC BUS 2

DC BUS 2

DC bus 2 through a DC tie control relay.

DC bus 1 through a DC tie control relay.

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

45 minutes dependent on equipment in use.

Until the APU is started.

Two hours and 30 minutes dependent on equipment in use.

Between 22 and 30 minutes depending on equipment in use.

Question Bank

Questions for Electricals A320