Electrical System

Question 1

List all the AC power sources.

Answer 1

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Question 2

List all the DC power sources.

Answer 2

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Question 3

Does the battery need to be on for the Hot Battery Bus to be powered? What about the Switched Hot Battery Bus?

Answer 3

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Question 4

Can the battery be charged with external AC?

Answer 4

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Question 5

What does the Ground Power Available light mean?

Answer 5

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Question 6

What is the difference between the Ground Power Switch in the flight deck and the Ground Service Switch on the Forward Attendant Panel?

Answer 6

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Question 7

What does the GEN OFF BUS Illuminated light mean?

Answer 7

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Question 8

When does the electrical source automatically transfer from APU to the engine IDG?

Answer 8

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Question 9

Describe automatic load shedding when aircraft is in flight with the APU running.

Answer 9

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Question 10

Describe automatic load shedding when aircraft is on the ground with the APU running.

Answer 10

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Question 11

What would happen if we were to turn the Battery Master off in flight?

Answer 11

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Question 12

When do the BTB’s close in the AUTO position?

Answer 12

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Question 13

When does the Cross-Bus Tie Relay open?

Answer 13

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Question 14

What condition(s) would cause the DRIVE light to illuminate?

Answer 14

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Question 15

Can an IDG be reconnected in flight?

Answer 15

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Question 16

How many TR units are there? Which bus powers TR 3?

Answer 16

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Question 17

What indication would you have if there was a fault in the DC power system or standby system on the ground? How would a fault be indicated in flight?

Answer 17

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Question 18

What powers the AC standby bus and DC standby bus when on standby power?

Answer 18

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Question 19

What Display Units will be powered when on standby power?

Answer 19

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