HAZMAT CDL Practice Test

When hauling hazardous materials, how often must you check your dual tires?

1. Every hour

2. At least once every two hours or 100 miles, whichever is less

3. Every time you stop

4. Once a day

The correct answer is: At least once every two hours or 100 miles, whichever is less

The correct choice emphasizes the importance of regularly checking dual tires, particularly when transporting hazardous materials. This specific frequency—at least once every two hours or 100 miles, whichever is less—aligns with safety regulations to ensure that potential issues with tire integrity are identified promptly. Dual tires are crucial for stability and load distribution, especially under the added pressures that hazardous material transport entails. Given the increased risks presented by carrying such materials, it is essential to identify any tire problems such as pressure loss, damage, or uneven wear, which could lead to safety hazards, including blowouts or vehicle loss of control. Choosing to check dual tires every couple of hours or after traveling a certain distance creates a proactive approach to safety, helping to mitigate risks that could arise from mechanical failures. This practice is not only a matter of regulatory compliance but also vital for ensuring the safe transport of hazardous materials, protecting both the driver and the environment.