Final answer:
Tire fires on a CMV are mainly caused by overloading the tire beyond its capacity and by having an unbalanced load, which both result in excessive friction and heat.
Step-by-step explanation:
C) Overloading and unbalanced loads The two main causes of tire fires on a Commercial Motor Vehicle (CMV) are overloading and unbalanced loads (Answer C). Overloading a tire beyond its weight capacity can cause excessive heat due to the additional friction, potentially leading to a fire. Similarly, an unbalanced load can create uneven wear and additional heat on one part of the tire, which can increase the risk of a fire. On the other hand, oil leaks and brake failures are less common causes but can also result in tire fires if the vehicle components become extremely hot and ignite the tires.
The two main causes of tire fires on a CMV (Commercial Motor Vehicle) are overloading and unbalanced loads. Overloading refers to placing excessive weight on the vehicle beyond its capacity, which puts undue stress and strain on the tires. Unbalanced loads, on the other hand, occur when the weight distribution on the vehicle is uneven, causing the tires to wear unevenly and potentially overheat.