Drum switches are considered to be ___.

Drum switches are primarily categorized as controllers because they are devices designed to control the operation of electric motors. They offer a way to start or stop a motor and to change the direction of rotation for certain applications. Within electrical systems, drum switches allow operators to easily manage the flow of electricity based on the operational needs of the machinery or system they are controlling.

While drum switches can technically play a role in motor startup functionality, their main purpose is to provide control over the motor’s operation rather than serving as a starter in the traditional sense. This distinguishes them from direct starters, which are specifically designed to initiate the operation of electric motors.

Understanding the definitions and functions of electrical components is crucial in discernment during practices and applications in the field. This classification emphasizes drum switches' role specifically in controlling functions rather than initiating power by themselves, which aligns with the correct choice.