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OK CDL Hazardous Materials (HazMat) Marathon

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

Ready for something a little different? This Oklahoma CDL Hazardous Materials (HazMat) Marathon is a lengthy practice test that contains a combination of all 192 questions that we have available for this OK endorsement. If you select a wrong answer, we’ll remember that question and will display it to you again at the end of the exam until you’ve answered that question correctly. In other words, the Marathon will cycle through your missed questions until you answer each one correctly. You must make a 100% to pass. We suggest you attempt this one after you have practiced the state’s “regular” tests, but before the “Exam”. Delivers some serious studying power! Do your best to complete this mega 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

12 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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