Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Recurrent > Electric > Flashcards

Electric Flashcards

1
Q

During takeoff if the right engine generator fails what happens to the utility and galley power?

A

Both utility and galley buses will be shed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where is the ground service switch used to power the ground service bus located?

A

Forward cabin flight attendant panel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In flight, the left engine is shut down. What electrically powered items are lost?

A

Both utility buses, the left center fuel boost pump, both recirc fans, and the C2 hydraulic
pump

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is accomplished by pushing the AC Bus Tie Switch to AUTO?

A

Arms the automatic operation of the Bus Tie Breaker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What causes the Standby Power Bus OFF light to illuminate?

A

Loss of the Standby AC or DC bus or STBY power switch is in the OFF position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What normally powers the Battery Bus during cruise?

A

The left DC bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Inflight the left generator trips off. What electrical busses are lost?

A

The two UTILITY buses and the galley buses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which bus is powered automatically when external power is plugged in?

A

Ground handling bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What automatically has the highest priority on the left main AC bus?

A

Left engine driven generator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

With external power available and the APU supplying both electrical and pneumatic power, what
happens as the first engine is started?

A

Both utility buses trip off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What electrical bus powers the discharge squibs for the fire extinguisher bottles?

A

Hot battery bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What bus powers most of the fire detection systems?

A

Battery bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is an integrated drive generator (IDG)?

A

Generator and CSD(constant speed drive) in one casing using the same oil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which has priority in supplying the ground handling bus?

A

External power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is required to enable the Captain’s flight instrument transfer bus to transfer with the loss of the
left main AC?

A

Both the left and right Bus Tie Switches must be in AUTO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When will the utility buses be shed during an engine start?

A

Only when the APU is supplying electrical and pneumatic power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

With the APU supplying both electrical and pneumatic power, what happens as the second engine is
started?

A

Only when the APU is supplying electrical and pneumatic power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

With the APU supplying both electrical and pneumatic power, what happens as the second engine is
started?

A

Only the utility bus for the engine being started trips off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

During triple channel approach, the left generator is lost at 140 feet radio altitude. As a result the left
main AC bus is lost.

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What action would cause the engine generators to trip off?

A

Pushing the External Power switch ON

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

With the APU supplying electrical power, what happens when the first engine starts (reaches idle
RPM)

A

The engine driven generator powers its respective main AC bus only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

With the Generator Control switch ON, what automatically closes when the engine starts?

A

Generator breaker only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

When will the APU Generator Control OFF light illuminate?

A

When the APU Generator breaker opens due to a fault

24
Q

The left main DC bus can power the battery bus with the Battery switch off

A

T

25
Q

What normally powers the battery bus during cruise?

A

L main dc bus

26
Q

What is powering the standby buses?

A

Left main AC and left main DC

27
Q

The APU can be used to power the left main AC bus while the right engine generator is powering the right main AC bus.

A

True

28
Q

To what bus is the utility bus connected, when the Utility Bus switch is ON?

A

Respective main AC bus

29
Q

What is accomplished by pushing the AC Bus Tie switches to AUTO?

A

Arms the automatic operation of the AC and DC bus tie system

30
Q

With the Bus Tie switch in AUTO, what causes the AC Bus ISLN light to illuminate?

A

Bus fault has occurred

31
Q

Pushing a Generator Control switch off opens both the field and generator breakers.

A

T

32
Q

Pushing the Generator Control switch off and then on resets the fault trip circuitry

A

T

33
Q

What does the run light on the APU control panel indicate?

A

That the APU is at operating speed

34
Q

Will the Generator Control Breaker close automatically when the voltage and frequency of the
respective IDG are within limits.

A

Yes

35
Q

What has occurred if during flight an off light illuminates and the “on” indicator is visible in the
generator control switch?

A

A fault has occurred and the generator control circuit breaker has automatically opened

36
Q

What can cause the DRIVE light of the GEN DRIVE DISC switch to illuminate?

A

The generator drive disconnect switch is pressed, High oil temp, Low oil press

37
Q

How many electrical buses are there in the Standby Power System?

A

4

38
Q

How is the hot battery bus normally powered?

A

Right main AC bus through the ground service bus and the main battery

39
Q

The battery bus is normally powered by the?

A

L DC bus

40
Q

What is the backup source of power for the battery bus if the normal source is not available?

A

The main battery

41
Q

The left main DC bus can charge the battery bus with the battery switch in the off position.

A

True

42
Q

The standby AC bus is normally powered by the?

A

Left main AC bus

43
Q

The standby DC is normally powered by the?

A

Left main DC bus

44
Q

With a loss of main AC and DC power what provides electrical power to the standby AC and DC
buses?

A

Main bat

45
Q

An amber standby bus off light illuminates and the EICAS message Standby Bus Off displays when?

A

Either standby AC or DC bus is unpowered

46
Q

What is the priority of power supply to the main AC buses?

A

Respective engine-driven generator, APU generator, opposite engine-driven generator

47
Q

What does an ISLN light mean in the bus tie switch?

A

The switch is off or a fault has occurred

48
Q

The AC bus tie switch must be on for the DC bus tie breaker to operate.

A

T

49
Q

The ground handling bus can only be powered on the ground by?

A

Apu external power

50
Q

When the utility bus switch is “on”, the utility bus is connected to the?

A

Respective main AC bus

51
Q

The HDG is supplied from which hydraulic system?

A

Center

52
Q

Which condition is not an example of load shedding?

A

Left or right AC bus load shedding

53
Q

When will the utility bus shed during an engine start?

A

Only when the APU is supplying electrical and pneumatic power

54
Q

With the Standby Power Selector in the BAT (Battery position) _______

A

The main battery and standby inverter powers the standby AC Bus

55
Q

Which electrical power sources can provide power for the Lower Cargo Doors, Main Cargo Door, and
Fueling Panel?

A

External power (AVAIL or ON) or APU generator

56
Q

What happens when you push a Generator Drive Disconnect (DRIVE DISC) switch?

A

Disconnects IDG from engine when above idle speed and opens related Generator Control
Breaker

Recurrent (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions