Recreational Vehicle (RV) Technician Practice Test

How can tire age be accurately determined?

1. By checking the tire tread depth

2. By examining the tire's surface for cracks

3. By reading the DOT code on the tire sidewall

4. By consulting the manufacturer's warranty

The correct answer is: By reading the DOT code on the tire sidewall

Determining the age of a tire is crucial for ensuring safety and performance, as tires have a limited lifespan regardless of tread wear. The correct method for accurately determining tire age is by reading the DOT code on the tire sidewall. This code is a standardized marking provided by the Department of Transportation that includes important information such as the manufacturing date. The DOT code consists of several elements, but the most relevant for assessing tire age is the last four digits, which indicate the week and year of manufacture. For example, if the code ends with "2319," it means the tire was manufactured in the 23rd week of 2019. This information is reliable and widely recognized by tire manufacturers, making it the most precise way to determine how old a tire is. In contrast, checking the tire tread depth assesses wear but does not indicate the tire's age. While a tire with shallow tread may need to be replaced, it does not provide information regarding how long the tire has been in use. Similarly, examining for surface cracks could give insight into the condition of the tire but also does not provide specific age information. Surface damage can be a sign of age or environmental exposure but cannot replace the precise data obtained from the DOT code. Consulting the manufacturer's