According to the regulations for small passenger vessels, fuses and circuit breakers are used in electrical circuits to __________.

Correct Answer: Option A — keep the circuit from becoming overloaded or overheated

Fuses and circuit breakers serve as overcurrent protection devices. They are designed to interrupt the electrical circuit automatically when current exceeds safe limits, preventing the wiring from overheating, which could lead to insulation failure, short circuits, and subsequent electrical fires on board the vessel, as mandated by 46 CFR Subchapter T.