III.F.K2

Question 1

8353. According to the electron theory of the flow of electricity, when a properly functioning DC alternator and voltage regulating system is charging an aircraft’s battery, the direction of current flow through the battery?

Answer 1

Is into the negative terminal and out of the positive terminal.

Question 2

8361. Why is it unnecessary to flash the field of the exciter on a brushless alternator?

Answer 2

Permanent magnets are installed in the main field poles.

Question 3

8363. How are the rotor windings of an aircraft alternator usually excited?

Answer 3

By a variable direct current.

Question 4

8369. Alternators are rated in volt amps, which is a measure of the apparent power being produced by the generator. Alternating current has the advantage over direct current in that its voltage and current can easily be stepped up or down.

Answer 4

Both are true.