Brainscape's Knowledge GenomeTM

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


See full index

ERJ Systems > Electrical > Flashcards

Electrical Flashcards

1
Q

What type of circuit breakers does the E175 have?

A

Thermal and Electronic

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

What is the purpose of the TRU?

A

Convert AC to DC

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

What are sources of AC power?

A

IDG
APU
GPU
RAT

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

When can you start the APU during normal operations?

A

10 mins prior to pushback

Or as necessary for passenger comfort.

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

What is the minimum battery voltage for normal operations?

A

22.5 volts

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

Can you start and engine without AC power?

A

Yes.

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

What type of power does the IDG provide?

A

AC

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

What should happen during a total loss of AC power in flight?

A

The RAT should deploy and provide AC power to the AC Essential Bus.

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

What items can the hot battery bus power?

A

Fuel Panel

Engine Fire Fighting

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

How do you manually disconnect the IDG?

A

Place the control knob to the DISC position.

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

What are the sources of DC power?

A

DC GPU

Battery

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

What converts AC to DC?

A

TRU

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

How many TRUs do we have?

A

3

TRU 1, 2 and ESS

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

How do we check digital circuit breakers?

A

MCDU

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

How do we check thermal circuit breakers?

A

CB Panel

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

How much time do we have on battery power alone?

A

10 minutes

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

What are the electrical power priorities?

A

Onside - same side IDG
Inside - APU
Outside - GPU
Cross side - Opposite IDG

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

How long does it take for the RAT to deploy?

A

8 seconds

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

When do the RAT deploy?

A

When there is AC power interruption

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

What KIAS is required to spin up the RAT?

A

150 KIAS

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

What is the minimum airspeed to provide electrical power from the RAT?

A

130 KIAS

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

What equipment is on the DC Standby Bus?

A

Igniters

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

What AC bus is powered when only DC is available?

A

AC Standby Bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What equipment is on the AC Essential Bus?

A

3221

3 HYD 3A
2 Fuel Pump 2
2 Slat ch 2
1 Flaps ch 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

When should you see cross side power?

A

Single engine taxi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What does the amber light indicate on the IDG panel?

A

High oil temp

Low oil pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What does the DISC setting on the IDG panel do?

A

Hard mechanical disconnect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

After starting the left engine, with the APU what will power the opposite AC BUS?

A

APU

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What will happen if you leave the GPU button pressed after being disconnected from external ac power?

A

The airplane will not allow you to reconnect until recycling the button

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

With a non annunciated aft cargo fire, how many times do you need to press the button to discharge the low-rate bottle?

A

3 times

  1. Arm
  2. High
  3. Low
31
Q

When the captain calls “Flaps 1, APU off, flight control check” what should you do for a proper power transfer?

A

Wait 30 seconds after N2 stabilizes to shut down APU.

APU has a 1 minute cool down where it still provides electricity

32
Q

During an electrical emergency, how many minutes power are the batteries capable of supplying?

A

10 minutes

33
Q

If you see ELEC EMERGENCY EICAS how much time do you have?

A

RAT should deploy in 8 seconds

If you cannot deploy you have 10 minutes of battery

34
Q

Can the RAT charge the battery?

A

Yes, the RAT can charger the BATT by converting AC to DC via TRU

35
Q

What is piece of equipment has the biggest draw on the RAT?

A

HYD 3A

36
Q

How does HYD 3A reduce draw on the RAT?

A

Unloader valve

Flow limiter

37
Q

When would the IDG LEDs turn on?

A

HOT LOP

38
Q

What does auto allow the IDG to do?

A

Allows for cross-side power

39
Q

What are the airplanes power priorities?

A

IDG, APU, GPU, Cross-side IDG

40
Q

If you turn the IDG to off then to auto will you get power

back?

A

Yes

41
Q

If you turn the IDG to DISC then to AUTO will you get

power back?

A

No its a one time mechanical disconnect

42
Q

What position does the GPU switch need to be in to

accept power?

A

Out

43
Q

What is the normal position of the AC bus tie switch?

A

Normal position is auto

44
Q

When do we take the AC bus tie switch out of auto?

A

When directed by a QRH procedure

45
Q

What does auto allow the bus tie to do?

A

It allows bus ties to be open or closed

46
Q

Where does APU GEN switch normally start?

A

In

47
Q

Why does the APU GEN switch start in?

A

To allow APU to pick up power right away

48
Q

What is the purpose of the TRU?

A

Convert AC to DC

49
Q

How do we charge batteries in flight?

A

AC power is converted by the TRU DC inverter to charge the batteries

50
Q

Which TRU will we use in electrical emergency?

A

TRU ESS

51
Q

What does TRU ESS do for us?

A

Allows the RAT to charge batteries in electrical emergency

52
Q

How long should it take to deploy the RAT?

A

8 seconds

53
Q

How do we know when the RAT is operating?

A

BATT discharge goes away

54
Q

When we still have the BATT discharge goes away what AC buss do we have?

A

AC STBY BUS

55
Q

What is on AC STBY BUS?

A

Igniters

56
Q

What is on AC ESS BUS?

A

3-2-2-1 Hydraulics 3A, AC fuel pump 2, Slat ch 2, Flap ch 1

57
Q

Which battery can be differed easier?

A

BATT 2

APU FADEC on BATT 1, APU stater On BATT 2 - can be replaced with DC GPU

58
Q

Why is battery 2 OFF/AUTO?

A

Auto allows power to be replaced by DC GPU

59
Q

When DC is first applied what is available?

A

Screens 2/3
IESS
22.5 volts, no lower than 21.0 to charge, lower than 21.0 Call Mx

60
Q

What page is available on MFD where there is only DC power?

A

Status

61
Q

Can we move the plane while IESS is turning on?

A

No

62
Q

How long does IESS take to warm up?

A

90 seconds

63
Q

What happens when we have AC power established (1 of 3 things)?

A

Electrical PBIT (ACEs FCMs for out of tolerance conditions)

64
Q

How long does E PBIT take?

A

3 minutes

65
Q

How many ways are there to to interrupt the E-PIT

A

3 ( ac power, all hydraulic are pressurized, flight control mode switches)
Windshield power up PBIT

66
Q

When will the power up PBIT begin?

A

When two AC sources are on.
Single engine taxi only one works
IRS begins alignment

67
Q

How long does IRS alignment take?

A

Up to 17 minutes to align, can align in flight

68
Q

Where is BATT temp displayed?

A

Electrical Synoptic Page

69
Q

What should you do if you get a BATT Over Temp Message?

A

Memory item - Effected battery OFF

70
Q

How do we convert DC to AC?

A

Inverters

71
Q

When should you turn on ADS probe heat before engine start?

A

-18 C before FFOD, erroneous readings, contamination, less that 0 with visual moisture

72
Q

What could erroneous ADS indications effect?

A

It could cause the E-PBIT to fail

73
Q

How does starting an engine effect the ADS probe heat?

A

Starting the engine activates the ADS probe heaters
If they were pressed in prior to start, you need to turn them off because it inhibits
system logic and will turn the probes off.
ADS probe heat is always on when engine(s) are started

74
Q

What COM/NAV equipment do we have durning an electrical emergency?

A

CA: NAV 1 IRS 1 CCD 1
FO: COM 2 MCDU 2

ERJ Systems (29 decks)

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