What is a serious risk when dual tires come into contact with each other?

Answer: B — Tire fire

When dual tires come into contact with each other, a serious risk is the potential for a tire fire. This situation often occurs when the tires are improperly mounted or when there are issues with tire pressure. When dual tires touch, it can generate excessive heat due to friction, especially if the tires are not rotating at the same speed. This increased heat can lead to a breakdown of the tire material and can ignite a fire if conditions are right. The risk of a tire fire highlights the importance of regularly checking tire pressure, ensuring the correct alignment, and maintaining the tires in good condition to prevent them from making contact with each other. Proper dual tire assembly and maintenance are crucial to avoid such dangerous situations on the road.