Electrical

Question 0

The main aircraft generators supply power to ____ AC buses

Answer 0

4

Question 1

The aircraft engine driven generators and APU generators are rated at

Answer 1

40 KVA

Question 2

Power for 28 VDC is supplied by

Answer 2

Transformer rectifier units

Question 3

The APU battery is

Answer 3

24 volts rated at 43 ampere hours

Question 4

The main battery is

Answer 4

24 volts 17 ampere hours

Question 5

____ transformer rectifier units TRU supply power to DC buses

Answer 5

4

Question 6

Cranking power for starting the APU is provided by

Answer 6

APU battery

Question 7

The ADG supplies AC power to

Answer 7

3B hydraulic pump, ESS AC bus, slats/flaps and pitch trim

Question 8

The main and APU batteries are kept in a charged condition by battery chargers powered by

Answer 8

AC Bus no.1 and AC service bus

Question 9

The external AC power receptacle is located

Answer 9

Forward right side of the airplane

Question 10

Electrical systems warning and caution messages are normally displayed on

Answer 10

EICAS primary page

Question 11

Electrical system status and advisory messages are normally displayed on

Answer 11

EICAS status page

Question 12

The integrated drive generator (IDG) provides a means of converging

Answer 12

Variable engine speed to constant generator speed

Question 13

The IDGs may be disconnected from the accessory gearbox by

Answer 13

Disconnect switches located in the cockpit, otherwise the crankshaft will break when it overheats

Question 14

Once disconnected, the IDG:

Answer 14

Can only be manually re-connected on the ground with engine shutdown by maintenance

Question 15

The IDGs convert variable engine speed to

Answer 15

12,000 RPM

Question 16

Fault protection for each generator is incorporated in each

Answer 16

Generator control unit

Question 17

The priority for allowing power to AC Bus 1 would be

Answer 17

Gen 1, APU, Gen 2, external AC power

Question 18

IDG 2 normally powers

Answer 18

AC bus 2, and service bus

Question 19

The ADG can only supply power to

Answer 19

3B hydraulic pump, AC ESSENTIAL, ADG bus, EICAS, slats, flaps, and pitch trim

Question 20

115 VAC is supplied to TRUs for DC static conversion, and each TRU is rated at

Answer 20

120 amps

Question 21

An ESS TRU failure message will be displayed on EICAS when

Answer 21

Output is less than 18 VDC

Question 22

Which DC Bus tie has automatic operation

Answer 22

All of the above: main tie, cross tie, ESS tie

Question 23

In flight, the ADG auto deploy monitors the three main AC generators and main AC generators and the main AC buses for

Answer 23

Complete AC power failure

Question 24

The main battery charger and APU battery charger are in a charging configuration when

Answer 24

Both a and c: battery master switch is “on”, both AC utility buses powered and AC bus 2 powered

Question 25

Main battery “off” or APU battery “off” caution messages are displayed on EICAS when voltage is

Answer 25

18 VDC

Question 26

An amber IDG fault light/ caution light indicates

Answer 26

Low IDG oil pressure and/or high IDG oil temperature

Question 27

A gen 1 overload caution message on EICAS would indicate a load of greater than _______ KVA

Answer 27

40.0

Question 28

An AUTO XFER fail light (amber) on the electrical panel indicates

Answer 28

Generator over current or a bus fault

Question 29

An AC ESS XFER light (white) on the electrical panel indicates

Answer 29

AC essential bus is not being powered by AC bus 1

Question 30

What are the generators rated at

Answer 30

40 kVA up to FL410

Question 31

Batteries supply DC electrical power to which buses

Answer 31

A, B, and C only: main battery bus, APU battery bus, DC Emer Bus