Industrial Maintenance Technician Practice Test 2026 – Your All-in-One Guide to Exam Success!

The primary function of a circuit breaker is to protect electrical circuits from overloads and short circuits. When the current flowing through the circuit exceeds a predetermined limit, the circuit breaker automatically interrupts the flow of electricity, preventing potential damage to wiring, appliances, and reducing the risk of electrical fires. This protective mechanism ensures that the electrical system operates safely within its designed parameters.

While enhancing circuit performance, increasing voltage levels, or connecting multiple circuits may play roles in electrical systems, these are not the core purposes of a circuit breaker. The importance of overload protection cannot be understated in maintaining the integrity and safety of electrical installations.