Airbus A340 - Electrical Power

Loss of one generator or TR (except, if lost is due to over current detection) provides:

Loss of the corresponding AC or DC bus.

No effects on flight management.

APU generator required operational.

Correct! Wrong!

What is the meaning of this ECAM?

Battery line contactor inoperative.

Abnormal voltage.

Charging current BAT1 increasing at abnormal rate.

Correct! Wrong!

Each engine generator supplies power to:

Its assigned AC BUS in normal operation.

The BUS on the opposite side in normal operation.

Only its assigned BUS in all cases.

Correct! Wrong!

When the MAINT BUS switch is on:

Only the DC buses are powered.

It is for the purpose of operating the cargo door only.

The electric network supply is limited to Ground Service items.

Correct! Wrong!

According to this ECAM ELEC page:

APU is not running.

APU GEN is failed.

APU GEN pb is set to Off.

Correct! Wrong!

During EMER GEN automatic start up sequence:

It is not recommended to push the MAN ON p/b to confirm EMER ELEC CONFIG on the EMER ELEC PWR Panel.

Red fault light on EMER ELEC PWR Panel will remain on until the EMER GEN reaches its normal output.

The MAN ON p/b must be pushed to extinguish red fault light on the EMER ELEC PWR Panel.

Correct! Wrong!

According to this ECAM ELEC page:

BAT1 and BAT2 are faulty.

BAT1 and BAT2 are not connected to the DC network.

BAT1 and BAT2 are supplying the DC network and discharge current is 40 A.

Correct! Wrong!

According to these indications which AC BUS supplies the ESS TR?

AC ESS.

AC 1-1 BUS.

AC 1-2 BUS.

Correct! Wrong!

When ECAM shows "ELEC ECMU 1 FAULT":

ECMU 1 controls GLC 1 and 2 and you should try to reset corresponding generators.

ECMU 1 controls GLC 1 and 2 and you should not reset corresponding generators.

ECMU 1 controls Generator Line Contactors (GLC 3 and 4) and you should reset generator 3 and 4.

Correct! Wrong!

With APU GEN and external powers supplying the network:

APU supplies AC ESS only.

APU is supplying left side, external power A is supplying the right side.

APU supplies AC 1-1 and AC 1-2 only.

Correct! Wrong!

What is the meaning of this ECAM?

DC 2 BUS is not powered due to a short circuit.

TR 2 is faulty.

BAT 2 is faulty.

Correct! Wrong!

The TR 2 is faulty, then the DC 2 BUS is unpowered.

The TR 2 is faulty, DC 2 BUS is powered by TR 1 through DC 1 and DC BAT BUS.

The TR 2 pb is set to OFF

Correct! Wrong!

Two Electrical Contactor Management Units (ECMU) provide:

Control of TR contactors.

Control and monitoring AC and DC contactors (except TR which have their own control), galley shedding and no break power transfer.

Control AC and DC contactors (except for TR contactors).

Correct! Wrong!

The main function of the MAINT BUS switch is:

To allow selected ground equipment to be powered without powering the entire electric system.

To power the AC and DC systems when the aircraft is on ground.

To allow EXT PWR to supply AC and DC ESS buses and their respective shed buses.

Correct! Wrong!

According to this ECAM ELEC DC page:

The BAT 2 is discharging at a rate of 4 A.

There is no degradation in the capability of DC system.

The Static Inverter is being powered because TR 1 is not powered.

Correct! Wrong!

An engine generator is driven:

Direct from the Accessory Gear Box (AGB).

At a ratio of 5 to engine speed.

By an Integrated Drive Generator (IDG).

Correct! Wrong!

The Emergency generator is powered by:

The Static Inverter.

The GREEN hydraulic system when pressurized by engine 1 or 4 driven hydraulic pump or by a Ram Air Turbine.

A Ram Air Turbine (RAT).

Correct! Wrong!

The minimum number of generators required to supply the whole network is:

Two engine generators.

One engine generator and the EMER GEN.

One engine generator.

Correct! Wrong!

In flight, APU not running, an engine generator has failed. What is supplying the corresponding AC BUS?

The other generator on the same side as the failed generator.

The other side outer engine generator.

Corresponding AC BUS is not powered. APU must be started to recover AC BUS.

Correct! Wrong!

This ECAM ELEC page shows:

GEN 4 pb is set to Off and engine 4 is not running.

GEN 4 pb is set to Off and engine 4 is running.

GEN 4 pb is set to On and engine 4 is running.

Correct! Wrong!

One function of the Electrical Contactor Management Units (ECMU) is:

Control of AC and DC bus ties, except TR contactor.

TR contactors monitoring.

Automatic management of contactors.

Correct! Wrong!

The APU battery:

Is dedicated to APU start only.

May be used for engine start when the APU is not available.

Can be used as a backup for BAT 1 or BAT 2.

Correct! Wrong!

On C/B ECAM page, the pilot reads "NORMAL". What does it mean?

Electric supply to CB is normal.

No fault detected in Electronics Equipment Bay.

There are no CB tripped or pulled.

Correct! Wrong!

As shown on this ECAM ELEC page, which BUS is normally supplying the ESS TR?

AC ESS BUS.

AC 1-1.

AC 2-4.

Correct! Wrong!

According to these indications:

EXT POWER is plugged, but is not available.

EXT POWER is being plugged and available for use when started.

EXT POWER is not plugged and APU GEN is connected.

Correct! Wrong!

What is the meaning of this ECAM?

There is an ECMU fault.

There is a TR overload.

There is an engine generator fault.

Correct! Wrong!

The EMER GEN is powered by a hydraulic system pressurized by an engine driven hydraulic pump. Pressing the LAND RECOVERY p/b switch will:

Normally recover the AC and DC LAND RECOVERY BUSES and the components for approach and landing.

Supply the landing gear.

Operate when the gear is extended.

Correct! Wrong!

The MAINT BUS switch is located:

On the overhead system panel in the cockpit.

On the Purser's Control Panel in the FWD cabin.

On the FWD Circuit Breaker Panel behind the cockpit.

Correct! Wrong!

Airbus A340 - Electrical Power

Quiz

Airbus A340 - Electrical Power

Loss of one generator or TR (except, if lost is due to over current detection) provides:

What is the meaning of this ECAM?

Each engine generator supplies power to:

When the MAINT BUS switch is on:

According to this ECAM ELEC page:

During EMER GEN automatic start up sequence:

According to this ECAM ELEC page:

According to these indications which AC BUS supplies the ESS TR?

When ECAM shows "ELEC ECMU 1 FAULT":

With APU GEN and external powers supplying the network:

What is the meaning of this ECAM?

Two Electrical Contactor Management Units (ECMU) provide:

The main function of the MAINT BUS switch is:

According to this ECAM ELEC DC page:

An engine generator is driven:

The Emergency generator is powered by:

The minimum number of generators required to supply the whole network is:

In flight, APU not running, an engine generator has failed. What is supplying the corresponding AC BUS?

This ECAM ELEC page shows:

One function of the Electrical Contactor Management Units (ECMU) is:

The APU battery:

On C/B ECAM page, the pilot reads "NORMAL". What does it mean?

As shown on this ECAM ELEC page, which BUS is normally supplying the ESS TR?

According to these indications:

What is the meaning of this ECAM?

The EMER GEN is powered by a hydraulic system pressurized by an engine driven hydraulic pump. Pressing the LAND RECOVERY p/b switch will:

The MAINT BUS switch is located: