Which of the following components is not typically a part of a school bus's electrical system?

The exhaust system is not typically considered a part of a school bus's electrical system. The electrical system primarily encompasses components that rely on electrical power to function, such as headlights, brake lights, and the battery.

Headlights and brake lights are essential for visibility and safety, powered by the electrical system. The battery serves to store electrical energy, supplying power to all electrical components when the engine is off and assisting in starting the engine.

In contrast, the exhaust system is a mechanical component responsible for directing exhaust gases away from the engine and reducing emissions. It operates independently of the electrical system and is primarily involved in the engine's operation, rather than in electrical functions. This distinction helps clarify the different roles that components play in a school bus's overall functionality.