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MD-83 > ELECTRICAL > Flashcards

ELECTRICAL Flashcards

0
Q

How many TRs?

A

4

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1
Q

How many sources of electrical power?

A

4

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2
Q

Where is the ELECTRICAL POWER CENTER located?

A

It’s the CB panel behind the Captain’s seat

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3
Q

Is the AC CROSSTIE SYSTEM manual or automatic?

A

AC CROSSTIE SYSTEM is automatic, DC CROSSTIE SYSTEM is manual

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4
Q

What are the two different temperatures displayed on the CSD temperature gauges?

A

INNER scale: Oil Outlet Temperature

OUTER scale: Oil Temperature RISE

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5
Q

What temperature do the CSD temperature gauges normally read?

A

OUTLET temperature

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6
Q

What are you reading when you push the “ PUSH FOR RISE” button near the CSD temperature gauges?

A

Oil temperature RISE as it passes thought the CSD

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7
Q

How many positions on the GENERATOR CONTROL SWITCH?

A

Three:

On, Off and Reset

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8
Q

Will the ENGINE GENERATOR automatically come on line on engine star if then APU was supplying power?

A

Yes as long as the long as the GENERATOR CONTROL SWITCH is in the ON position

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9
Q

What do the AC LOAD METERS indicate?

A

The load that each generator is delivering to its respective AC BUS

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10
Q

On the AC GENERATOR LOAD METER, what is indicated by

“.5” ?

A

50% of RATED CAPACITY

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11
Q

What are the AC LOAD LIMITS?

A

“1.0” - “1.5” for FIVE (5) MINUTES

Greater than “1.5” for FIVE (5) SECONDS

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12
Q

Engine Driven Generator load limits

A

VOLTAGE: 115. +/- 3

FREQ. : 400 + /- 4

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13
Q

AC BUS X-TIE

In AUTO, what are its functions? (3)

A

1- Prevents paralleling of Power Sources
2- Keeps AC Buses powered
3- Isolates system faults

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14
Q

During normal operations, is the AC X-TIE open or closed?

A

Open

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15
Q

What are the indications when there’s a fault on a bus?

A 
"AC CROSSTIE LOCKOUT" 
"L AC BUS OFF"
"L GEN OFF"
     message on the MESSAGE DISPLAY SCREEN 
The AC X TIE locks open
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16
Q

What is the APU BLUE POWER IN USE indicate?

A

APU is powering the corresponding AC BUS

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17
Q

Why is it necessary to place both APU BUS SWITCHES to on while on the ground?

A

Because the APU does not have X TIE CAPABILITIES on the ground

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18
Q

Does EXTERNAL POWER have X TIE CAPABILITIES?

A

No

19
Q

ELECTRICAL SOURCE POWER PRIORITY

A

Respective side engine generator
APU generator
EXTERNAL power
Opposite side engine generator

20
Q

Is it normal to have the following message?:

APU GENERATOR OFF

A

Yes, after both engines have been started

21
Q

What powers the GROUND SERVICE BUS?

A

RIGHT GENERATOR BUS
APU on the ground
EXT. PWR on the ground

22
Q

GALLEY POWER Sheds when the X-TIE closes.

T/F?

A

True

23
Q

APU GENERATOR LIMITS

A

115 +/- 3

400 +/- 10

24
Q

What powers the two #1 TRs?

A

Via the left AC BUS. Both are powered from the LEFT AC BUS

25
Q

What powers the two RIGHT TRs?

A 
#1 RIGHT TR is powered from the RIGHT AC BUS
#2 RIGHT TR is powered from the GROUND SERVICE BUS
26
Q

What do the DC LOAD METERS indicate?

A

The load that each TR is delivering to its respective DC BUS

27
Q

What are the DC LOAD LIMITS?

A

“0” - “1.0”

LOAD DIFFERENCE of 0.3 between the two TRs on the same side

28
Q

What protects against a FAULT during DC CROSSTIE OPERATIONS?

A

A fuse

29
Q

What normally powers the DC TRANSFER BUS and the EMERGENCY DC BUS?

A

From the LEFT DC BUS

30
Q

How many batteries?

A

2 14 volt batteries

In series that provide 28 volts

31
Q

Where does the BATTERY CHARGER get its power from?

A

GROUND SERVICE BUS

32
Q

Conditions for the BATTERY CHARGER to operate in a charging condition (3)

A

GROUND SERVICE BUS powered
BATTERY SWITCH on
EMERGENCY POWER SWITCH off

33
Q

Turning the battery off removes power from: (2) (3)

A

BATTERY BUS
BATTERY CHARGER
If no AC power is available,
DC TRANSFER BUS

34
Q

-Battery switch is on
-Both AC Electrical systems fail
Which buses will be powered?

A

BATTERY BUS
BATTERY DIRECT BUS
- through an automatic power transfer,
DC TRANSFER BUS

35
Q

What is powered when the EMERGENCY POWER SW is turned to ON?

A

EMERGENCY DC BUS
-and through an INVERTER,
EMERGENCY AC BUS

36
Q

What is indicated by the illumination of the

EMER PWR IN USE light?

A

Illuminates when the EMER PWR sw is placed to “on”

37
Q

During an emergency situation, the five buses will be available for ______ minutes

A 
30 minutes
DC TRANSFER BUS
BATTERY DIRECT BUS
BATTERY BUS
EMERGENCY DC BUS
EMERGENCY AC BUS
38
Q

Which DC BUS is ALWAYS powered by the BATTERY?

A

The BATTERY DIRECT BUS is always powered by the BATTERY

39
Q

How do you power the BATTERY BUS?

A

By turning BATT s/w to “ON”

40
Q

How do you turn off the BATTERY CHARGER?

A

Turning BATTERY SWITCH to “OFF”

Note: And if no AC POWER available, the DC TRANSFER BUS

41
Q

If BATTERY SWITCH is on and you loose all AC POWER, which buses are still powered?

A

BATTERY BUS
BATTERY DIRECT BUS
DC TRANSFER BUS (Via Power Transfer Bus)

42
Q

What does the EMERGENCY POWER sw powers when set to “ON”?

A

EMERGENCY DC BUS

EMERGENCY AC BUS ( via INVERTER)

43
Q

What’s powered from the DC TRANSFER BUS?

  • Fire detection and protection
  • STB Horizon Indicator
  • Master Warning and Caution systems
  • LEFT SCREEN of OVERHEAD ANNUNCIATOR
A

DC TRANSFER BUS

  • Fire detection and protection
  • STB Horizon Indicator
  • Master Warning and Caution systems
  • LEFT SCREEN of OVERHEAD ANNUNCIATOR
44
Q

What’s powered from the EMERGENCY DC BUS?

A
  • Cockpit Flood Lights
    • Captain’s Radios
    • Captain’s Pitot Heat
45
Q

What’s powered from the EMERGENCY AC BUS?

A

Captain’s Flight Instruments

First Officers RDMI

MD-83 (6 decks)

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