Electrical Power

Question 1

In normal​ configuration,​ how is DC​ ESS bus​ supplied?

Answer 1

TR 1

Question 2

What​ happens​ in case of total loss​ of main generators when​ airborne?​

Answer 2

The ​ RAT​ ​ is ​ automatically ​ extended ​ and ​ powers ​ the​ ​ blue​ ​ hydraulic ​ system ​ which ​ drives​ ​ the​ ​emergency​ generator

Question 3

AC ESS​ bus​ is​ normally supplied​ by:​

Answer 3

AC BUS 1

Question 4

DC​ BAT​ BUS can be​ supplied​ by

Answer 4

DC​ BUS 1,​ DC​ BUS 2​ or​ batteries

Question 5

AC BUS tie contactors enable​ the​ electrical​ system

Answer 5

To be supplied by any generator​ or external​ power

Question 6

What​ happens​ during EMER GEN​ TEST ?

Answer 6

The EMER GEN is driven hydraulically if the blue electric pump​ is​ running

Question 7

When disconnecting the IDG,​ the button should​ be​ pressed

Answer 7

For no more than 3 seconds

Question 8

On​ the ​EMER ​ELEC​ PWR panel,​ ​a​ ​fault​ light​ ​ illuminates ​under ​the​ ​ RAT​ ​and ​EMER ​GEN ​ label.​ ​What​ does​ it​ mean?

Answer 8

Emergency generator​ is​ not​ supplying​ power​ when AC​ BUS1 and 2​ are​ not​ powered

Question 9

What​ happens​ when the GEN 1 LINE pushbutton is set​ to​ off?

Answer 9

AC bus​ 1 is powered by GEN 2​ because GEN 1 line contactor​ is​ opened.​

Question 10

In​ cold​ aircraft​ configuration​ (no AC​ and​ no​ DC​ supply),​ where​ can the​ battery​ voltage be​ checked?

Answer 10

On the​ ELEC​ overhead​ panel.​

Question 11

In flight, on batteries​ only,​ the AC​ ESS​ SHED BUS and​ the DC​ ESS SHED BUS are​ lost

Answer 11

True

Question 12

The static​ inverter​ works

Answer 12

When​ ​ the ​ aircraft​ ​ speed​ ​ is​ ​above ​50​ ​knots,​ ​ the ​ inverter​ ​is​​ automatically​ activated,​ if​ ​nothing​ but​ ​ the​ ​batteries​ are supplying electrical​ power

Question 13

On​ ground,​ what​ happens​ if​ the MAN ON​ pushbutton​ on​ the​ EMER ELEC​ PWR panel​ is​ pressed in

Answer 13

The RAT​ is​ extended

Question 14

The static​ inverter transforms the DC​ voltage from the BATTERY​ BUS into

Answer 14

Single​ phase​ 115​ V -​ 400​ hertz AC​ current

Question 15

When operating,​ GEN 1 and 2​ have​ priority over APU​ GEN

Answer 15

true

Question 16

With APU available, if one generator​ fails, the​ failed generator​ is​ replaced​ by

Answer 16

The APU

Question 17

In case​ of loss​ of all​ main generators AND the emergency generator in flight, the​ DC​ ESS BUS​ ​ is​ supplied​ ​by

Answer 17

HOT BUS 2

Question 18

In case​ of loss of all​ main generators in flight,​ BUT emergency generator​ running, the​ DC​ ESS​ BUS​ ​ is supplied​ ​by​ the

Answer 18

ESS TR

Question 19

Generators are​ sometimes connected​ in​ parallel

Answer 19

FALSE

Question 20

AC BUS 1 fails, the AC​ ESS​ BUS is supplied​ bY

Answer 20

AC BUS 2

Question 21

With batteries as​ the​ only electrical​ source, the​ AC​ ESS​ BUS is supplied​ b

Answer 21

The static inverteR

Question 22

If only one generator​ is​ operating​ in​ flighT

Answer 22

Automatically shedding​ part​ of galley load is​ performed

Question 23

Can you reconnect the​ IDG​ in​ flight?

Answer 23

NO

Question 24

When GEN 1 or​ GEN 2​ is​ selected to​ ofF

Answer 24

The GEN is​ de-energized​ and line contactor​ opens

Question 25

When the​ EXT PWR pushbutton green AVAIL​ is​ illuminated, it​ means

Answer 25

The EXT PWR is connected​ to the A/C​ and​ the parameters​ are​ ​ normaL

Question 26

The BAT​ FAULT​ light​ illuminates​ when

Answer 26

Charging current​ is outside​ limits