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EMB-135BJ > Electrical > Flashcards

Electrical Flashcards

0
Q

In normal operations, the electrical system is divided into _____ networks.

A

2

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1
Q

Power to the DC system is supplied by:

A

4 Eng. driven DC Generators (28Vdc, 400A)
1 APU driven DC Starter/Generator (28Vdc, 400A)
2 NiCad Main Batteries, 24V 44ah
1 Lead Acid Backup Battery, 24v 5ah
1 GPU Connection 1600a rating

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2
Q

Electrical system management and protection is performed by:

A

Electronic Distribution Logic (EDL)

Generator Control Units (GCU)

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3
Q

The ______ has priority over al other power sources.

A

GPU

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4
Q

Generators _____ and _____ supply the left electrical network

A

1

3

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5
Q

Generators _____ and ______ supply the right electrical network.

A

2

4

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6
Q

The APU is normally connected in parallel to generators _______ and ______.

A

2

4

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7
Q

The APU generator can replace any inoperative _________ or may be used before engine starting.

A

Generator

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8
Q

Both main batteries are _______ Vdc _______ amp hour NiCads

A

24

44

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9
Q

The batteries cannot be recharged by the __________.

A

GPU

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10
Q

The No. 1 battery is charged by the generators connected to _____ during normal flight operations

A

the left network

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11
Q

The _____ battery provides electrical power for APU starting

A

2

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12
Q

When on the ground with the batteries as the only electrical power source the ________ busses are deenergized.

A

Shed

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13
Q

During APU starting, the _____ battery is isolated from the load busses.

A

1

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14
Q

The batteries can provide ____ minutes of power in an electrical emergency.

A

40

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15
Q

An electrical emergency is defined as:

A

a loss of all generators

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16
Q

In an electrical emergency, EDL automatically configures the system dedicating the batteries to the ___________ and ________ busses only

A

essential

central

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17
Q

If the automatic transfer fails, you can manually connect the batteries to the essential busses by pressing the __________ button

A

essential power

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18
Q

On the ground, all DC busses can be energized if at least one of the following conditions is met:

A

GPU in use
1 Generator online & shed bus switch selected to OVRD
3 Generators online

19
Q

The _____ ________ bus is energized by connecting the GPU to the airplane with the batteries off and the GPC, BC1 and BC2 open

A

ground service

20
Q

A “BATT OVTEMP” warning message is presented on the EICAS when the associated battery temperature exceeds ______ ºC.

A

70

21
Q

A ____ Vdc, ___ Ah, sealed _____ _____ backup battery provides stabilized power for operation of the _______ protective function, even in case of a short circuit when system voltage may drop to near 0 volts.

A

24
5
lead acid
GCU

22
Q

For the backup battery to be charged the system must be energized through a power source other than external power and a ________ selector must be set to AUTO

A

battery

23
Q

The primary power source for the aircraft is the four 28 Vdc brushless ______ ______ _______.

A

Engine Driven Generators

24
Q

The aircraft generators will come online when engine speed reaches _________ N2

A

56.4%

25
Q

A “GEN 1(2,3,4) OVLD” caution message indicated that the associated generator is above _______ amps.

A

400

26
Q

If an over voltage is detected, the associated _______ isolates the generator from the DC bus.

A

GCU

27
Q

A generator reset attempt is allowed ______ time(s) after a failure.

A

1

28
Q

The APU and GPU are connected to the aircraft electrical system through the __________ DC bus which also provides ________ sharing in the event of generator failure or engine shutdown.

A

Central

Load

29
Q

The ______ starter generator can replace any engine dirven generator.

A

APU

30
Q

The APU generator supplies electrical power to the system at _____ % RPM plus ______ seconds

A

95

7

31
Q

If the airplane is on the ground, all DC busses will be kept energized for which of the following:

GPU on and connected:
4 Generators online:
3 Generators online:
2 Generators online:
1 Generator online:
At least 1 Generator online with Shed Bus set to "OVRD":
A 
Yes
Yes
Yes
No
No
Yes
32
Q

If the airplane is in the air, all DC busses will be kept energized if at least ______ generators are online.

A

3

33
Q

All generator currents and voltage can be monitored on the ______ page of the _______.

A

Electric

MFD

34
Q

The following lights are powered by the Ground Service Bus:
_________ __________
_________ __________
_________ __________

A

Pax Cabin Lights Lav Lights
Galley Lights Courtesy/Stair Lights
Cockpit Dome Lights Baggage/Service Compartment Lights

35
Q

The AC system is powered by ____ 250Vac single phase static _______ (NA after Legacy s/n 863)

A

1

inverter

36
Q

Avionics Master push buttons allow disconnection of some navigation and communication equipment from the load busses while starting the ______ on the ground.

A

APU

37
Q

The maximum load on the engine generator is ______ amps.

A

400

38
Q

The maximum load on the APU starter-generator up to 30,000 ft is _________ amps. The maximum load above 30,000 ft is _____ amps.

A

400

300

39
Q

The minimum battery temperature for APU start is ______ ºC.

A

-20

40
Q

The minimum battery voltage for APU start is ______ volts.

A

23.5

41
Q

If the battery voltage drops below _____ volts, the battery must be physically removed from the aircraft by maintenance for recharging.

A

19

42
Q

List the items on Hot Bus 1:
__________ _________
__________ _________
__________

A

ELT Engine Fire Bottle A
Fuel Shutoff Valve Eng. 1 Hyd. Shutoff valve eng. 1
Fuel pressure refueling

43
Q 
List the items on the Hot Bus 2
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_     \_\_\_\_\_\_\_\_\_\_\_\_\_
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_     \_\_\_\_\_\_\_\_\_\_\_\_\_
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_     \_\_\_\_\_\_\_\_\_\_\_\_\_
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
A

Courtesy/Stair lights Auto pos. Eng. Fire Bottle B
Fuel Shutoff valve Eng. 2 Hyd. Shutoff valve eng. 2
Main Door Control Fus fuel isolation valve
Fus fuel vent valve

44
Q

The _________ override switch closes the relay provided the airplane in on the _________ with at least _____ generator(s) operative.

A

Shed bus
Ground
1

45
Q

An illuminated strip in the button on the overhead panel means the switch in not in the normal _______ position.

A

flight

EMB-135BJ (32 decks)

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