| Number of questions: 30 | |
| Passing score: 80% | |
| Acceptable number of errors: 6 |
Instruction: To obtain this endorsement for hauIing hazardous materials, applicants must pass a 20-question test. Before taking the test, applicants must pass a Transportation Security Administration background check. And to pass the test, applicants must score at least 80%. Test questions are from the Texas Commercial Driver Handbook. The Hazardous Materials endorsement can be used with the Class A, B, or C CDL. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Texas DMV locations.
