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A-Level Airbus Tech Quiz on 4. Electrical System, created by Joe Bloggs on 19/09/2018.

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4. Electrical System

4. Electrical System

Question 1 of 36

1

In normal electrical configuration, how is DC ESS bus supplied

Select one of the following:

  • From TR 1 via DC bus 1 and DC Bat Bus

  • From ESS TR

  • From TR 2

  • From Batt 2.

Explanation

Question 2 of 36

1

What happens in case of total loss of main generators

Select one of the following:

  • The Rat is automatically extended and powers the yellow system which drives the emergency generator.

  • The Rat is automatically extended and powers the blue system which drives the emergency generator.

  • The Rat has to be manually extended

  • The Rat is extended and mechanically connected to the emergency generator.

Explanation

Question 3 of 36

1

the electrical power system consists of

Select one of the following:

  • A three phase 115/200 volt 400 hertz constant frequency AC system and a 28 DC system

  • A three phase 180/220 volt 400 hertz constant frequency system and a 28 volt DC system

  • A three phase 115/220 volt 400 hertz constant frequency system and a 28 volt DC system

  • A three phase 115/200 volt 400 hertz constant frequency DC system and a 28 volt AC system

Explanation

Question 4 of 36

1

Dc Bat bus can be supplied by

Select one of the following:

  • DC Bus 1 or batteries

  • DC Bus 1, DC Bus 2 or batteries

  • DC Bus 2 or batteries

  • DC Bus 1 only.

Explanation

Question 5 of 36

1

AC Bus tie contactors enable the electrical system

Select one of the following:

  • To be connected in parallel

  • To be supplied by any generator or external power

  • To be supplied by apu gen or external power only

  • To be tied to external dc power.

Explanation

Question 6 of 36

1

What happens during the emergency gen. test

Select one of the following:

  • The ram air turbine is extended

  • The blue system is pressurised and the emergency generator comes on line

  • The green system is pressurised and the emergency generator comes on line, supplied by hot bus 2.

  • The emergency generator comes on line and the yellow system is pressurised.

Explanation

Question 7 of 36

1

Normal minimum battery voltage before apu start is

Select one of the following:

  • 22v.

  • 25.5v

  • 27.5v

  • Minimum

Explanation

Question 8 of 36

1

When disconnecting the IDG the button should be pressed

Select one of the following:

  • For no more than 3 secs

  • For longer than 3 secs

  • Until the fault light goes out

  • For no more than 5secs.

Explanation

Question 9 of 36

1

On the emergency electrical power panel, a fault light illuminates under the ‘ RAT and Emer.Gen.’ label. What does it mean

Select one of the following:

  • Rat is not extended

  • Emergency generator is not supplying when AC bus 1 and 2 are not powered or Dc Bat bus is not powered

  • Emergency generator is supplying but AC Ess bus is not powered

  • Emergency generator is not supplying when AC Bus 1 and 2 are not powered

Explanation

Question 10 of 36

1

What happens when the Gen 1 line Pb. is set to off

Select one of the following:

  • AC Bus one and 2 are not powered and emergency generator is automatically connected

  • AC Bus 1 is powered by the gen. 2 because the gen 1 is deactivated

  • AC Bus 1 is powered by the gen.2 because the gen.1 line contactor is opened

  • AC Bus 1 is not powered because the gen. 1 line contactor is opened and transfer contactor is not closed

Explanation

Question 11 of 36

1

Where can the battery voltage be checked

Select one of the following:

  • On the ECAM elec page only

  • On the elec overhead panel and the ECAM elec page

  • On the elec overhead panel and the ECAM E/WD

  • On the elec overhead panel only

Explanation

Question 12 of 36

1

AC essential bus is normally supplied by

Select one of the following:

  • AC Bus 1

  • AC Bus 2

  • Static inverter

  • Emer. gen

Explanation

Question 13 of 36

1

In flight on batteries only, the AC Ess Shed bus and DC Ess Shed bus are lost

Select one of the following:

  • Yes

  • No

  • Only A/C Ess Shed Bus is lost

  • Only D/C Ess Shed Bus is lost

Explanation

Question 14 of 36

1

The static inverter works

Select one of the following:

  • Always

  • When A/C speed is > 50kts and on batteries only

  • When one main generator fails

  • Only when gen. 2 fails

Explanation

Question 15 of 36

1

On ground what happens if the RAT and Emer. Gen. Man On Pb. Is pressed

Select one of the following:

  • The Rat is extended

  • The emergency generator is activated

  • Nothing

  • The blue hydraulic system is pressurised and this causes the RAT to extend and rotate.

Explanation

Question 16 of 36

1

The static inverter transforms the DC voltage from the battery bus into

Select one of the following:

  • Single phase 115v - 400 Hz. A/C current

  • Three phase 115/200v - 400hz. A/C current

  • 28v D/C current

  • 25.5v D/C current.

Explanation

Question 17 of 36

1

In flight in case of loss of all main generators, emergency generator not yet running (batteries only), the static inverter supplies

Select one of the following:

  • A/C Ess bus and Engine Ignition A

  • Eng Ignition & A/C Ess Bus & A/C Ess Shed Bus

  • Eng Ignition Only

  • Hot bus 1

Explanation

Question 18 of 36

1

The external power has priority over the Apu. gen.

Select one of the following:

  • Yes

  • No

  • Only in flight

  • No, Apu. gen. has priority over external power always

Explanation

Question 19 of 36

1

Gen 1 and Gen 2 when operating have priority over the Apu gen

Select one of the following:

  • Yes

  • No

  • Only in flight

  • Only on the ground

Explanation

Question 20 of 36

1

With Apu gen. available, if one main generator fails, the failed generator is replaced by

Select one of the following:

  • The APU

  • The other computer

  • Bus tie takes place and the remaining main generator supplies both channels

  • The RAT

Explanation

Question 21 of 36

1

If a TR fails

Select one of the following:

  • The other TR automatically replaces the faulty one & the Ess TR supplies the DC Ess Bus

  • The Static inverter replaces the faulty TR

  • The DC Bus on the faulty side is lost

  • The Emergency generator supplies DC power on the faulty side

Explanation

Question 22 of 36

1

In flight in case of loss of all main generators, emergency generator not running, the DC Ess Bus is supplied by

Select one of the following:

  • Hot bus 2

  • Ess TR

  • Both

  • Hot bus 1

Explanation

Question 23 of 36

1

In flight in case of loss of all main generators, emergency generator running , the DC Ess Bus is supplied by the

Select one of the following:

  • Hot bus

  • ESS TR

  • Both

  • DC Bat bus

Explanation

Question 24 of 36

1

The IDG regulates the ........ of the generator

Select one of the following:

  • Speed

  • Voltage

  • Frequency

  • GLC (generator line contactor)

Explanation

Question 25 of 36

1

When switched to ALTN the AC Ess Feed p/b causes the AC Ess Bus to be

Select one of the following:

  • Supplied from AC bus 1

  • Supplied from AC bus 2

  • Supplied from DC bus 1

  • Supplied from DC bus 2

Explanation

Question 26 of 36

1

If AC bus 1 fails the AC Ess bus is supplied by

Select one of the following:

  • Emer Gen

  • AC Bus 2

  • Static inverter

  • The RAT

Explanation

Question 27 of 36

1

In case of total electrical loss the AC Ess bus is supplied by

Select one of the following:

  • Static inverter

  • Emer Gen

  • Both

  • TR 1

Explanation

Question 28 of 36

1

In Emergency configuration, AC Ess shed bus is automatically shed

Select one of the following:

  • If the RAT stalls or aircraft is on ground with speed<100kts

  • When the landing gear is down

  • When in emergency configuration

  • When AC Bus 1 is lost

Explanation

Question 29 of 36

1

If one main generator fails in flight (and the APU generator is not being used)

Select one of the following:

  • Part of the galley load is automatically shed

  • All galley load is automatically shed once the APU generator becomes available.

  • All galleys are shed

  • All galleys are not shed

Explanation

Question 30 of 36

1

Can you reconnect the IDG in flight

Select one of the following:

  • Yes

  • No

  • No. 1 idg only

  • No. 2 idg only.

Explanation

Question 31 of 36

1

When Gen. 1 or Gen. 2 is selected to off

Select one of the following:

  • The Generator field is de-energised and the line contactor is open

  • The Generator is still energised and line contactor is open

  • Cannot select off in flight

  • Can only be reset on ground.

Explanation

Question 32 of 36

1

When the EXT Pwr Pb green avail is illuminated

Select one of the following:

  • The external power is connected to the a/c

  • The A/C network is supplied

  • Ground services are supplied

  • D/C network supplied

Explanation

Question 33 of 36

1

Emergency generation, the D/C bat bus is automatically connected to the batteries

Select one of the following:

  • below ‘s’ speed

  • below green dot speed

  • below 50kts

  • below 100 kts

Explanation

Question 34 of 36

1

When you want to check battery voltage, you must set the Bat Pb to

Select one of the following:

  • Auto position

  • Off position

  • Norm position

  • On position

Explanation

Question 35 of 36

1

The Bat fault light illuminates when

Select one of the following:

  • Battery voltage < 25v

  • Battery Pb switch is at off in flight

  • Charging current increases at an abnormal rate

  • Charging current is low

Explanation

Question 36 of 36

1

In certain cases the static inverter is supplied by

Select one of the following:

  • Hot bus 1 and Hot bus 2

  • Hot bus 1

  • D/C Bat bus

  • A/C Ess bus

Explanation

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