Which component helps ensure the engine does not overheat?

Answer: B — Cooling system

The cooling system is responsible for regulating the temperature of the engine, preventing it from overheating. It works by circulating coolant through the engine, absorbing heat, and then dissipating that heat through the radiator. The efficiency of this system is vital for maintaining optimal engine performance and longevity. If the cooling system fails or is inadequate, the engine can reach critical temperatures, leading to severe damage or complete engine failure. Thus, understanding the function of the cooling system is crucial for anyone working with vehicles, including school buses, where safety and reliability are paramount. In contrast, the fuel system primarily manages the delivery and mixture of fuel and air to the engine, while the ignition system is responsible for igniting the fuel-air mixture. The exhaust system handles the expulsion of combustion gases, but none of these systems directly regulate engine temperature.