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OK CDL Hazardous Materials (HazMat) Practice Test 2025

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

Your livelihood depends on you passing your OK HazMat exam. You studied, but you don’t reallydon’t quite feel as if you’re fully prepared. You could just walk into the DMV and hope for the best, but that would be a mistake. Instead of rolling the dice, take an Oklahoma Hazardous Materials practice test. The practice test will get you prepared for the real deal. Then, you’ll be sharp and ready to go on the big day.

Your Practice Test – What to Know

A CDL Hazardous Materials practice test closely resembles the actual test you’ll take at the DMV. The test’s 30 questions are taken from the 2025 Oklahoma CDL manual, just like the questions on the authorized exam. Because of that, you will come across the same types of questions on the practice test and the authorized test. They might be worded in a different way, but the meaning will still be the same. That makes the practice test the perfect way to prepare for taking your HazMat test.

Since this is a practice test, use it as a way to prepare yourself for the big test. Take out your pencil and paper and make a note of your weak areas. If something is giving you issues, you can go back and review it. Then, take the practice test over and over again until you ace it.

Then, you’ll be ready for test day.

Tackling the Test

Test day might feel stressful, but keep in mind, you have prepared for it. You are ready to handle whatever comes your way. Just remember what you learned on the practice test, and you will be prepared.

Get those remaining nerves out of your system by taking the practice test again. After all, practice really does make perfect, and that will burn the answers into your head. Then, you will go in like a force to be reckoned with when you take your test.

Best of luck on your endorsement test. As long as you take your practice test and follow these tips, you shouldn’t have any problem whatsoever with your test.

Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives
Commercial Driver's License
Based on official OK exam questions
This test is a Premium member exclusive. You'll get

All 650 exam-like questions specific to Oklahoma

Interactive learning with AI personal tutor

Unique 360° Virtual Road Simulations

Get your money back if you don’t pass

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

5 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

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