Aircraft Systems Knowldge (Electrical)

Question 1

If AC BUS 1 fails, will the AC ESS BUS remain powered?

(ELEC Panel)

Answer 1

Yes

Question 2

If AC BUS 1 fails, which bus supplies the AC ESS BUS?

(ELEC Panel)

Answer 2

AC BUS 2

Question 3

What is indicated by a FAULT light in the GEN pb?

(ELEC panel)

Answer 3

The associated generator control unit (GCU) trips

OR

The line contactor opens (except if GEN pb is selected OFF)

Question 4

What does a BAT OFF light represent?

(3 things)

(ELEC Panel)

Answer 4

Battery charger limiter is not operating

OFF light illuminates if the DC BATT BUS is powered

Hot buses remain powered

Question 5

What does the greeen EXT PWR AVAIL light indicate?

(ELEC Panel)

Answer 5

EXT PWR is connected and good

Question 6

What does the blue EXT PWR ON light indicate?

(ELEC Panel)

Answer 6

EXT PWR is connected (supplying power) to the ELEC system.

Question 7

What does the battery charger limiter automatically control? (when the BAT 1&2 are selected on)

ELEC Panel

Answer 7

Connection and the disconnection of the corresponding battery to the DC BAT BUS (by closing and opening of the battery line contactor)

Question 8

What does a BAT FAULT light represent?

(ELEC Panel)

Answer 8

Comes on amber light with an ECAM caution message. (when the charging current for the corresponding battery is outside limits.)

Question 9

What does the AC ESS FEED FAULT light represent?

(ELEC Panel)

Answer 9

AC ESS BUS is not powered

Question 10

What does a FAULT light in IDG 2 pb represent?

(ELEC Panel)

Answer 10

High oil temp/ Low oil pressure

Question 11

During One Engine Taxi:

1) which GEN is powering AC BUS 1?
2) AC BUS 2?

Answer 11

1) GEN 1
2) APU (bus tie)

Question 12

What does the smoke light in GEN 1 LINE pb indicate?

(EMER ELEC PWR Panel)

Answer 12

Smoke is detected in the avionics ventilation duct

Question 13

What occurs when the GEN 1 LINE pb is selected OFF?

(3 things)

(EMER ELEC PWR Panel)

Answer 13

GEN 1 line contact opens

AC BUS 1 channel supplied from GEN 2 through BUS tie contacts

Separate circuit is energized from GEN 1 to supply power to one fuel pump in each main tank.

Question 14

What is indicated by a RAT & EMER GEN FAULT light?

(EMER ELC PWR Panel)

Answer 14

EMER GEN is not supplying power when AC BUS 1 & AC BUS 2 are not powered.

Question 15

With the RAT MAN ON sw in AUTO, what will cause the RAT to deploy?

(EMER ELEC PWR Panel)

Answer 15

AC BUS 1&2 not supplied, AC Speed greater than 100 kts

Question 16

What will happen if you press the RED guarded MAN ON pb?

(EMER ELEC PWR Panel)

Answer 16

Manual RAT extension (incld on ground)

Question 17

Which hydraulic system is pressurized by deployment of the RAT?

(EMER ELEC PWR panel)

Answer 17

Blue

Question 18

How long does it take for the EMER GEN to couple after RAT deployment?

Answer 18

Approx. 8 sec