Electrical Flashcards

1
Q

The primary source of electrical power is the four _V DC, _ Amp, independent engine driven generators

A

28, 400

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2
Q

Two _V DC, _ ampere-hour nickel cadmium batteries supply essential loads in case of an in flight failure of all generators

A

28, 44

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3
Q

The GPU supplies _V DC to the load buses for ground operation and APU starting, independently of the internal batteries

A

28

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4
Q

When GPU AVAIL is illuminated and the batteries are not connected to the buses, only the _ bus is supplied through the external power supply

A

Ground service

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5
Q

Both batteries can supply at least _ minutes of power for essential loads in an all generator failure condition

A

40

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6
Q

Battery number _ provides power for APU start, battery number _ provides stable electrical power to the equipment that can be adversely affected by voltage transients

A

2
1

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7
Q

At _ RPM plus seven seconds, the APU starter generator is available to supply electrical power to the system

A

95%

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8
Q

With _ generators on, there are two isolated left and right electrical networks with all buses energized

A

4 or 5

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9
Q

With _ generators on, both electrical networks interconnected through bus tie contactors with all buses energized

A

3

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10
Q

In flight, with _ generators on, both electrical networks are interconnected through bus tie contactors with shed bus de-energized

A

1 or 2

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