School Bus CHP Practice Test

Which of the following defects would prevent the use of rear tires?

1. Unrepaired fabric

2. Exposed cord

3. Bulges, bumps or bruises due to internal separation

4. All of the above

The correct answer is: All of the above

The presence of any of the listed defects—unrepaired fabric, exposed cord, or bulges, bumps, or bruises due to internal separation—indicates a significant risk to the safety and functionality of the tires. Each of these issues compromises the structural integrity of the tire, making it unsafe for use. Unrepaired fabric indicates that the tire's outer layer has been damaged, potentially exposing layers of material that are crucial for maintaining tire strength and resilience. This can lead to further deterioration or failure. Exposed cord is a critical issue, as the metal or fabric reinforcing materials that provide the tire with its load-bearing capability are visible due to wear or damage. This situation greatly increases the likelihood of tire blowout or catastrophic failure while driving. Bulges, bumps, or bruises signify internal issues such as separation of the tire components, which can lead to sudden tire failure. These defects are often a result of severe impacts or prolonged wear and signal that the tire is at risk of losing air pressure or rupturing. Collectively, these defects compromise the reliability and safety of the tires, making their use not only impractical but also dangerous. Therefore, all of the mentioned defects would indeed prevent the safe use of rear tires, justifying the