Electrical

Question 1

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

Answer 1

28, 400

Question 2

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

Answer 2

28, 44

Question 3

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

Answer 3

28

Question 4

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

Answer 4

Ground service

Question 5

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

Answer 5

40

Question 6

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

Answer 6

2
1

Question 7

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

Answer 7

95%

Question 8

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

Answer 8

4 or 5

Question 9

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

Answer 9

3

Question 10

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

Answer 10

1 or 2