• This is a sample CDL Pass written test prep question from the Hazardous Materials test. For more information about the USA CDL test bank, click here.
• This question may be in error or may be out of date. However...
• For the answer to this question, please download our CDL Pass written test prep software. Our software will generally be considerably more up-to-date than this web page and will contain a much more complete set of questions. The download is free - give it a try!
• If this question refers to a chart or figure (as some do), please accept our apologies - figures are not available online. However, all necessary charts and figures are available in our CDL Pass software.

Copyright, Content, and Accuracy Notice: . Dauntless Software grants visitors permission to use the contents of this page for personal use - commercial or public use, including collecting (or harvesting) of any data or material on this page is strictly prohibited. This material is presented for informational purposes only and may be in error. Dauntless Software works hard to maintain our USA CDL question banks. If you see an error on this web page, it is likely NOT an error that is repeated in our software, as our software (unlike this web page) is connected to our editorial mechanism whose mission is to quickly identify and correct errors. If you see what you believe to be an error, please download and try our software to see if the error is repeated there. If you believe it is, you can use the issue-reporting mechanisms within the software to contact our editors about any concern you may have and we will be happy to look into it promptly.