FAA AMT Airframe Practice Exam 2025 – Complete Exam Prep Guide

Question: 1 / 1030

What does the commutator of a generator do?

Converts mechanical energy into electrical energy

Changes alternating current into direct current

The commutator of a generator is responsible for changing alternating current into direct current. This is achieved by reversing the current direction at specific points in the rotation of the armature. It helps to ensure a unidirectional flow of current in the external circuit connected to the generator. Option A is incorrect because the conversion of mechanical energy into electrical energy is the function of the generator as a whole, not specifically the commutator. Option C is incorrect because regulating the voltage output is typically done by other components like voltage regulators. Option D is incorrect because distributing electricity to the circuits is the function of other components like bus bars or circuit breakers, not the commutator of the generator.

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Regulates the voltage output

Distributes electricity to the circuits

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