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OK CDL HazMat Practice Test 2 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements.

While soldiers train at Fort Sill to protect national security, you can prepare to add a Hazardous Materials (HazMat) endorsement to your Oklahoma commercial driver’s license (CDL). Our second free Oklahoma DPS CDL HazMat endorsement practice test helps you learn how to safeguard these materials while in transit. A HazMat endorsement helps you advance your driving career by identifying you as a driver with the expertise necessary to transport hazardous materials. The practice test is designed to make complex rules and regulations less confusing. You’ll learn the essential information you must know to protect people, property, and the environment in a simplified language that supports your ability to absorb it and qualify for more driving opportunities.

Our Oklahoma DPS CDL HazMat endorsement practice test saves you valuable study time by creating a highly effective study plan specifically for you. Earning a Hazmat endorsement requires you to complete an entry-level driver training course, undergo a Transportation Security Administration (TSA) background check, and pass an official knowledge test. You must correctly answer at least 80% of the 30 questions on the official knowledge test to pass. The practice test provides you with 30 questions, similar to those on the official knowledge test, to evaluate your current knowledge level and directs you to the information to increase it. You’ll be positioned to rapidly develop the skills and confidence that will lead to your success.

By starting with an analysis of your misunderstandings, this Oklahoma DPS CDL HazMat endorsement practice test streamlines your learning process. If you get a question wrong, the practice test responds with a detailed explanation of the correct answer. Equipped with this information, you’ll receive a clear picture of how to apply it to various driving scenarios and possibly pass the official knowledge test on your first try.

Using the most authoritative information available, the practice test gives you the confidence to provide logical answers to the questions on the official knowledge test. The practice test is based on the most recent Oklahoma DPS CDL manual (Oklahoma CDL Handbook 2025) and is up to date as of December 2025. Unlike a study guide that teaches you by memorizing the answers to the questions, the practice test goes beyond providing surface knowledge and fully prepares you to answer the most challenging questions. You’ll have all the ingredients for acing your official knowledge test.

More practice tests are available to provide you with the most innovative training techniques to expand and improve your driving skills. You can study for your CDL permit, learn to drive tanker vehicles, and much more.

You can cool off with a dip in Turner Falls, and develop the hottest driving skills using the practice tests at https://driving-tests.org/oklahoma/.

Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives
OK CDL HazMat Practice Test 2 2025
Commercial Driver's License
Based on official OK exam questions
Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Authored and fact-checked by Steven Litvintchouk, M.S.

Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
Methodology & Editorial Policy

4 min to complete
Available in EN and ES

What to expect on the actual OK permit test

30

questions

24

correct answers to pass

80%

passing score

Real Oklahoma drivers who passed first try

Verified student reviews • Shared with permission

The Best Website for Preparing for Driving Knowledge Tests.
I had to take a Entry-level Driver Training Course (ELDT) before I could take the actual Hazmat Endorsement knowledge test. So, I turned to Driving-Tests for help, not only did they provide the study materials I needed to pass the Hazmat Endorsement knowledge test, they're listed in the Training Provider Registry (TPR), so, they're approved by the Federal Motor Carrier Safety Administration (FMCSA) to submit training completion certificates to the TPR. Needless to say, after successfully completing their ELDT course, they submitted my completion certificate to the TPR. I was then able to take my Hazmat Endorsement knowledge test and I passed it on my first attempt!
MD
Saved me time and money!
I was able to get my Hazmat ELDT certificate in under 1 day. Not only was it extremely fast, but I actually feel much more knowledgable on the subject. Much better alternative to spending thousands and going to a brick and mortar school!
AG

More OK CDL test resources

  1. HazMat Test 1
  2. HazMat Test 2 (you are here)
  3. HazMat Test 3

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