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  • Updated for June 2025
  • Based on 2025 TX commercial driver's license manual

Free Texas CDL HazMat Endorsement Practice Test 2025

Adding the Hazardous Materials (Hazmat) endorsement to your Commercial Driver’s License (CDL) is a great way to expand your job opportunities and increase your earning potential! In Texas, you’ll experience a wide range of sights, from the steep grades and winding roads of Hill Country in central Texas to the arid deserts in West Texas. Additional challenges include the high summer temperatures, limited road infrastructure, the flooding and hurricanes that occasionally threaten the coastal plains, and urban congestion in cities like Houston, Dallas, and Austin. Transporting cargo in Texas comes with its set of challenges, but the rewards offered by this career and the additional opportunities available with the Hazmat endorsement make it very worthwhile.

In the Lone Star State, hazardous materials transported include petroleum products, chemicals used in the energy sector (sulfuric acid, ammonia), agricultural chemicals, and medical waste. The Hazmat endorsement allows drivers to transport these and other materials classified hazardous by the U.S. government, opening the door to specialized, and often higher-paying, jobs. Some notable organizations in Texas include ExxonMobil in Houston, Dow Chemical Company in Freeport, Valero Energy in San Antonio, and Sysco in Houston. These companies in the petrochemical and logistics sectors are just a few of the ones that require drivers with Hazmat endorsements.

Now that you’ve had a taste of the added benefits and opportunities, let’s dive into the process of obtaining the endorsement. It starts with a mandatory fingerprinting and background check conducted by the Transportation Security Administration (TSA). Since results from TSA take weeks, do this right away and use the wait time to study and practice for the second step: the DMV knowledge test. This test covers federal regulations, substance handling, packaging, quantity limits, and transport configurations for hazardous materials. With a score of 80% on Texas’s 30-question knowledge test, you will pass the test (Texas CDL Handbook 2025).

The good news is we’ve simplified the preparation process for you. Our Texas DMV Hazmat Endorsement practice tests avoid unnecessary information and resemble what you will face on the official DMV test. With immediate feedback on each response to enhance understanding and retention, you’ll learn more efficiently. Once you receive your TSA results and feel prepared, you’ll visit the DMV with the necessary documents, pay the fees, and pass the test.

TX commercial driver's license
  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Triple-checked for accuracy

What you need to know

7 min to complete
Available in EN and ES
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article.

What to expect on the actual TX DMV exam

30

questions

24

correct answers to pass

80%

passing score

List of questions (classic view)

  1. Do you need to stop before a railroad crossing if you are hauling 100 pounds of Division 4.3 materials?
  2. When shippers package the material, they are trying to
  3. Which of the following materials are acceptable floor liners for transporting Division 1.1 or 1.2 materials?
  4. What are the major differences between cargo tanks and portable tanks?
  5. How often should you check the tires on a placarded trailer that has dual tires?
  6. Your engine runs a pump when you are delivering compressed gas. After finishing the delivery, when should you turn off the engine?
  7. You must NEVER smoke or perform any activity involving fire within 25 feet of
  8. In what location must you keep your shipping papers that describe any hazardous materials?
  9. Cargo tanks are
  10. To determine if you need to use placards, you do NOT need to know
  11. Where are the two main places that the hazardous material identification number appears?
  12. Which of the following three hazard classes should NOT be placed into a temperature-controlled trailer (one with a heater/air conditioner unit)?
  13. A safe haven is
  14. What is a technical name?
  15. If you are already carrying 100 pounds of silver cyanide, what precautions must you take if you are given papers at a dock to carry 100 cartons of battery acid?
  16. What action should you take if you discover your hazardous materials shipment leaking at a rest stop but there is no phone available?
  17. Which of the following is NOT an acceptable type of marking for hazardous materials?
  18. Besides the shipping papers and the packages, the other two places where the hazardous material identification number must appear are
  19. Which of the following are necessary qualifications for non-bulk packaging?
  20. Which of the following hazard classes uses a transport index to determine how much of it can be loaded on a single vehicle for transport?
  21. A placarded vehicle must carry a fire extinguisher with a minimum rating of
  22. If you are carrying Division 1.2 or 1.3 materials, how far away must you park from a bridge, tunnel, or building?
  23. What is the purpose of a driver placarding his or her vehicle?
  24. If you are carrying Division 1.2 or 1.3 materials, how far away must you park from the traveled portion of the roadway?
  25. The Emergency Response Guidebook (ERG)
  26. A vehicle placarded for hazardous materials must have placards on ____ sides.
  27. Which of the following hazard classes should NOT be placed into a temperature-controlled trailer (one with a heater/air conditioner unit)?
  28. You may not park a vehicle carrying explosives within ____ feet of an open fire.
  29. If there is an accident involving hazardous materials, who reports it to the proper government agency?
  30. At a rest stop, you discover that your hazardous materials shipment is leaking but there is no phone available. What do you do?
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