Commercial Driver License (CDL) Class B Practice Test

How can vehicle operators mitigate the risk of tire fires?

1. By driving at lower speeds

2. By regularly checking tire pressure

3. By only using new tires

4. By avoiding sharp turns

The correct answer is: By regularly checking tire pressure

Regularly checking tire pressure is crucial for mitigating the risk of tire fires because tires that are either under-inflated or over-inflated can generate excessive heat while in motion. When tires are not at the recommended pressure, they may flex more than intended, leading to a buildup of heat due to friction. This heat can reach a point that may cause the tire materials to degrade or even ignite, especially when coupled with external heat sources or debris on the road. Maintaining proper tire pressure helps ensure the tires operate efficiently and reduces the chances of overheating, punctures, and potential tire blowouts, all of which can contribute to fire risks. Regular tire checks also involve looking for wear and damage that could increase susceptibility to fires. While alternative strategies, like driving at lower speeds, using new tires, or avoiding sharp turns, may contribute to safer driving practices, they do not directly address the primary factor leading to tire fires, which is the heat generated from improper tire pressure.