Brainscape's Knowledge GenomeTM

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


See full index

MEPT > Electrical Systems > Flashcards

Electrical Systems Flashcards

1
Q

How many batteries?
Voltage?
Range?
AH?
Type?

A

2x
24v DC
Inflight range 27-29v
30 AH each
Lead acid

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

GPU Voltage

A

24.5 - 29v to make it ‘avail’

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

Generator load limits

A

250A - Ground and above 34,000’
300 - Airborne below 34,000’

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

PDU (check correct)

A

Power distribution units. Left, right and centre

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

EPDU

A

Emergency power distribution unit. In the nose, front wheel bay

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

GCU

A

Generator control units x2. Monitor generator output for V and load limits. Will disconnect gen if out of limits

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

When is Shed Bus available?

A

GPU or both generators in flight.

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

EBC 1 and 2 usual positions

A

1 - NC
2 - NO

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

What % N2 does a gen become available?

A

44% N2

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

Which bus bars is Gen 1 attached to?

A

DC Bus 1 - Emerg Bus - Hot Batt Bus

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

Which bus bars is Gen 2 attached to?

A

DC Bus 2 - DC Bus 2 - Central Bus - Hot Batt Bus
|
Shed bus

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

‘Elec XFR Fail’

A

Batteries powering DC Bus 1+2 during double gen failure.

Press elec emerg switch (guarded)

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

Cas message for - Batteries powering DC Bus 1+2 during double gen failure.

A

‘Elec XFR Fail’

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

Purpose of EC BCK 2

A

Keeps BC2 closed so that is can activate SC1/2 in case of flame out

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

When batteries are normal what is their range? What colour will this be?

A

27-29v
Green

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

During normal ops which contactors will be open?

A

BTC 1 + EBC 2 open

17
Q

GPU minimum V to charge batteries?

A

27v

18
Q

During gen 1 fail which contactors will be open?

A

GLC 1 + SPC open
BTC 1 closed

19
Q

If you get batt discharge CAS message (on ground), what do you do?

A

Batt 1 + 2 switch - off.
Just before start turn back on

20
Q

At what point will PMA start providing power on engine 2 start?

A

When GPU disconnected.

21
Q

Ohm’s law

A

V

I R

MEPT (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions