FAA AMT Airframe Practice Exam 2025 – Complete Exam Prep Guide

Question: 1 / 1030

What is the most common method of regulating the voltage output of a compound DC generator?

Varying the rotor speed

Changing the armature winding

Varying the current through the shunt field coils

The most common method of regulating the voltage output of a compound DC generator is by varying the current through the shunt field coils. By adjusting the current flowing through the shunt field coils, the strength of the magnetic field in the generator can be controlled, which in turn regulates the output voltage. This method provides a simple and effective way to adjust the voltage output without affecting other components of the generator.

In contrast:

- Varying the rotor speed is not the most common method of voltage regulation for a compound DC generator.

- Changing the armature winding is not typically used for voltage regulation in a compound DC generator.

- Adjusting the external load will affect the generator output but is not the most common method of voltage regulation for a compound DC generator.

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Adjusting the external load

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