Sky-High Success: Ace the FAA AMT Airframe Practice Exam 2025 – Soar to New Heights!

A DC motor consists of many different components, but the four major parts that are essential for its functioning are the rotor, stator, brush assembly, and end frame. Other components like the armature assembly, field assembly, bearing, etc. may be present but are not considered as crucial as the four major parts.

Option A is incorrect because it does not mention the armature assembly, which is an essential part of a DC motor.

Option C is incorrect because it does not mention the stator and rotor, which are the two main components responsible for the motor's movement.

Option D is incorrect because it does not mention the stator and rotor, and also includes the field coils which are not considered as one of the major parts of a DC motor.