Brainscape's Knowledge GenomeTM

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


See full index

Compass Systems > E175 Electric System > Flashcards

E175 Electric System Flashcards

1
Q

How many networks make up the electrical system on the Airplane?

A
  • 2 independent networks

- redundancy and fault isolation

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

What happens if a power-generating surface fails?

A
  • bus ties automatically connect to provide no system degradation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What components power the AC system?

A
  • 2 integrated drive generators IDG
  • APU
  • inverter
  • the RAT
  • AC GPU receptacle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What components power the DC system?

A
  • 2 NiCad batteries
  • 3 transformer rectifiers units TRU
  • DC GPU receptacle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How does the IDG maintain a stable power output?

A

A constant speed drive CSD attaches the IDG to the AGB accessory gear box

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

What monitors and controls the IDG’s

A

Each has a GCU generator control unit

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

Can one IDG supply the entire electrical system?

A

Yes

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

What will cause the Amber IDG light on the O/H panel to illuminate?

A
  • high oil temp

- low oil pressure

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

If an IDG is manually disconnected can the flight crew reconnect it?

A

No- it’s a maintenance thing

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

What is the primary purpose of the AC generators?

A
  • To power the AC busses and the AC ess bus which….

- power the 3 transformer rectifier units TRU 1, 2 and ESS

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

What is the purpose of the transform rectifier units TRU?

A

To convert 115vac to 28DC

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

Can the APU replace a failed IDG?

A

Yes- up to 33,000 feet

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

What is the AC electrical systems priority?

A
  • Onside IDG
  • Inside APU
  • Outside GPU
  • Cross-Side (other IDG)

Note: the plane uses an onboard AC power source before an external AC source

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

How is it known that an AC GPU is hooked up to the airplane and ready to provide electricity?

A
  • GPU button displays AVAIL and the GPU icon is presented on the electrical synoptic page
  • Once the GPU button is pushed in, the button will display IN USE provided another AC power source is not available
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does it mean if the AC GPU is plugged in and the outside GPU panel button displays IN USE?

A
  • ground service bus is in use

- cockpit GPU button will display AVAIL even though the ground service bus is in use

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

If the airplane is using the AC GPU and the APU is started what should the pilot be sure to do?

A

Deselect the GPU button

17
Q

What will charge the batteries?

A

Any AC power source

18
Q

How long will the planes batteries last with no recharging?

A

10 minutes

19
Q

What is the purpose of the DC GPU receptacle?

A
  • for APU start when batteries <20 VDC or,

- if battery temp is < -20c

20
Q

What is the min battery temp for APU start

A

-20C

21
Q

What is the minimum battery voltage to close the battery bus-ties?

A

18 volts

22
Q

What battery is used for the APU start?

A
  • BATT 2 powers the APU start bus

- BATT 1 powers the FADEC & EICAS for monitoring

23
Q

What is the purpose of the inverter?

A

Converts 28 VDC from the batteries to 115 VAC to power the AC STANDBY BUS when an AC source is not available

24
Q

What is on the AC STANDBY BUS?

A

Engine exciters 1A and 2A

25
Q

What powers the RAT?

A

Airflow turns the RAT propeller which spins the turbine inside

26
Q

When will the RAT deploy?

A
  • auto if AC BUSSES are not powered

- manually by pilot

27
Q

How long once deployed does it take for the RAT to supply power?

A

8 seconds

28
Q

Is there a total loss of power during the 8 second RAT deployment?

A

No. Batteries supply power to the DC ESS BUSSES and AC STANDBY BUS

29
Q

What does the RAT power?

A

ESS BUSSES

30
Q

What is the minimum airspeed for the RAT?

A
  • 130k

- load shedding occurs below this speed

31
Q

When is the RAT icon displayed on the electrical synoptic page

A

When the RAT is deployed

32
Q

What manages the electrical system?

A
  • 4 integrated control centers (ICC)

- 2 secondary power distribution assemblies (SPDA)

33
Q

What is an ICC

A

An electrical control device, which provides power distribution and protection for electrical loads

34
Q

What is a SPDA?

A

An electrical load management unit (powered by the ICC’s) that distributes electrical loads to plane systems according to distribution logic

35
Q

Can the flight crew reset the ICC and SPDA remote electronic CB’s?

A
  • ICC CB’s can only be reset by maintenance on the ground

- SPDA CB’s can be reset via the MCDU

Compass Systems (5 decks)

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