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erj > ELECTRICAL SYSTEM CBT > Flashcards

ELECTRICAL SYSTEM CBT Flashcards

1
Q

WHAT IS THE ELECTRICAL SYNOPTIC PAGE?

A

PROVIDE VISUAL REPRESENTATION OF ELECTRICAL SYSTEM OPERATION AND PARAMETERS.

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2
Q

WHAT KIND OF ELECTRICITY DOES THE AIRPLANE RUN ON?

A

PRIMARILY AC BUT ALSO USES DC

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3
Q

WHAT IS AN INTEGRATED DRIVE GENERATOR?

A

IDG, IS THE INTEGRATION OF A CONSTANT SPEED DRIVE AND AN AC GENERATOR TO SUPPLY CONSTANT FREQUENCY AC POWER

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4
Q

HOW MANY IDGs NORMALLY POWER THE AIRPLANE?

A

2 ENGINE DRIVEN

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5
Q

HOW DO THE IDGs PRODUCE POWER?

A

THEY ARE DIRECTLY CONNECTED TO THE ENGINE OUTPUT VIA GEAR BOXES, AUTOMATICALLY ONLINE WHEN ENGINES STARTS.

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6
Q

WHERE IS THE PLUG IN FOR THE GPU? HOW DO WE USE IT?

A

BELOW THE CAPTAIN SIDES WINDOW
SYSTEM WILL CHECK FOR PROPER (VOLTAGE/AMERAGE/FREQUENCY) AND A GREEN “AVAIL” ON THE ELECTRICAL CONTROL PANEL ALLOWS USE TO USE IT AS THE PRIMARY POWER SOURCE. (PUSH IN)

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7
Q

WHAT IS THE APU? AND WHAT CAN IT PROVIDE?

A

AUXILIARY POWER UNIT, IT CAN PROVIDE POWER TO ALL ELECTRICAL POWER TO ALL BUSES.
PROVIDES SAME OUTPUT AS AN ENGINE DRIVEN GENERATOR

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8
Q

WHAT IS A TRANSFORMER RECTIFIER UNIT? HOW MANY TRUs AND HOW DO THEY FUNCTION?

A

TRU CONVERT AC POWER TO DC.

2 TRUs THAT FUNCTION INDEPENDENT OF EACH OTHER

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9
Q

AC STANBY BUS

A

POWERED BY A DC BUS THROUGH AN INVERTER.
POWERED ON WITH THE BATTERIES
ALLOWS FOR ENGINE START WITH NO AC POWER

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10
Q

WHAT IS THE AC ESSENTIAL BUS?

A

CONTAINS ALL THE ITEMS FOR SAFE OPERATION OF THE AIRCRAFT IN CASE OF AN ELECTRICAL FAILURE.

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11
Q

WHAT IS ON THE AC ESSENTIAL BUS?

A

AC FUEL PUMP 2A
ACMP 3A
SF-ACE 1 FLAP CH 1 AV FEED
SF-ACE 2 SLAT CH 2 AC FEED

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12
Q

WHAT IS THE RAM AIR TURBINE?

A

AC ELECTRAL DEVICE, CONVERTS KINETIC ENERGY INTO AC POWER.

POWERS ESSENTIAL SYSTEMS

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13
Q

HOW LONG WILL BATTERIES SUPPLY ESSENTIAL LOADS WITHOUT THE RAT?

A

10 MINUTES

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14
Q

WHAT HAPPENS IF AN AC POWER SOURCE FAILS?

A

THE AC BUSES AUTO CONNECTED BY BUS TIE CONTACTORS (BTCs). AND ONE AC POWER SOURCE IF ENOUGH TO RUN THE SYSTEM,.HOWEVER,GALLEY AND R. WINDHIELD HEAT POWER ARE AUTOMATICALLY SHED.

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15
Q

WHAT IS THE DC EXTERNAL POWER SOURCE USE FOR?

A

DC GPU, USED TO ASSIST WITH APU START.

RARELY USED.

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16
Q

WHAT TYPE OF BATTERIES DO WE HAVE? WHAT DO THEY POWER DIRECTLY?

A

TWO 24 V SLAB (SEALED LEAD ACID BATTERIES)

POWER THE DC ESSENTIAL BUSES AND THE HOT BATTERY BUSES.

17
Q

WHY IS THE FUEL PANEL ON THE HOT BUS?

A

TO ALLOW FUELING AND DEFUELING WHEN THE AIRPLANE IS POWERED DOWN.

18
Q

WHAT ELECTRICAL INFORMATION IS ON THE STATUS PAGE?

A

BATTERY VOLTAGE.

19
Q

WHAT IS THE MINIMUM BATTERY VOLTAGE FOR NORMAL OPERATION? WHEN IS A MAINTENACE WRITEUP REQUIRED?

A
  1. 5V

21. 0V

20
Q

WHAT DO THE IDG SELECTOR INDICATE?

A

AUTO: AUTO SUPPLIES AC POWER AFTER ENGINE START
OFF
DISC: MECHANICALLY DISCONNECT IDG (MUST BE HELD FOR 1 TO 3 SECONDS). MAINTENANCE IS REQUIRED
AMBER LIGHT INDICATES LOW/HIGH OIL PRESSURE, ALONG WITH EICAS MSG

21
Q

WHAT DOES THE AC BUS TIE SELECTOR INDICATE?

A

1 OPEN: OPENS BTC 1, SEGREGATING AC BUS 1 FROM 2
AUTO
2 OPEN: OPENS BTC 2, SEGREGATING AC BUS 2 FROM 1

22
Q

WHAT IS THE NORMAL OPERATION OF THE APU BUTTON?

A

NORMALLY PUSHED IN

23
Q

TRU SELCTORS INDIATIONS?

A

AUTO: AUTO OPERATION
OFF: ISOLATES TRU FROM THE ASSOCIATED BUS

24
Q

BATTERY 1 SELECTOR KNOB INDICATIONS?

A

ON: SUPPLIES POWER TO DUS BUS 1 AND HOT BATTERY BUS 1
OFF: ONLY SUPPLIES POWER TO HOT BUS 1

25
Q

DC BUS TIE TOGGLE SWITCH INDICATIONS?

A

AUTO

OFF: OPENS BOTH ESSENTIAL TIE CONTACTORS (ETC) AND DC TIE CONTACTOR (DCTC)

26
Q

BATTERY 2 SELECTOR KNOB INDICATIONS?

A

AUTO: AUTOMATICALLY POWERS DC BUS 2 OR APU START BU AND HOT BATTERY BUS 2
OFF: ONLY SUPPLIES POWER TO HOT BUS 2

27
Q

WHAT TYPE OF CIRCUIT BREAKERS ON THE ERJ?

A

ELECTRONIC AND THERMAL
ELECTRONIC ARE ACCESSED THROUGH THE MCDU
SOME THERMALS ARE IN THE COCKPIT

28
Q

WHEN DO WE USE THE RAT MANUAL DEPLOY?

A

AS DIRECTED BY THE QRH IN AN ELECTRICAL EMERGENCY.

erj (24 decks)

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