CDL Hazardous Materials Practice Test

How often should you check the tires of a placarded vehicle?

1. Once a day

2. Before starting and each time you stop

3. Only at the beginning of the trip

4. Weekly, regardless of use

The correct answer is: Before starting and each time you stop

Checking the tires of a placarded vehicle before starting and each time you stop is essential for maintaining safety and compliance with regulations. This practice ensures that any potential issues with tire pressure, tread wear, and overall condition are identified and addressed promptly. Tires play a crucial role in vehicle stability and handling, especially for vehicles carrying hazardous materials, where failure can lead to significant risks such as accidents and spills. Conducting these checks at multiple intervals allows drivers to spot problems that may develop during a journey or as loads change. Daily checks or weekly inspections alone may not adequately catch such issues, which is why the emphasis is on performing checks before starting the journey and at each stop. This proactive approach enhances safety for all road users and helps ensure that the vehicle is in optimal condition to transport hazardous materials.