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OH CDL Hazardous Materials (HazMat) Marathon

12 min

Need one final boost? This Ohio CDL Hazardous Materials (HazMat) Marathon is a lengthy practice test that contains a mixture of all 191 questions that we have available for this OH endorsement. If you select a wrong answer, we’ll remember that question and will display it to you again at the very end of the Marathon 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”. Give it your best shot!

Commercial Driver's License
Based on the official OH CDL HandbookHandbook‑based (2025) + exam‑taker feedback
This test is a Premium member exclusive. You'll get

All 650 exam-like questions specific to Ohio

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

Real Ohio drivers who passed first try

Verified student reviews • Shared with permission

Just finished with 97%!
Took my Ohio sit down test only missed 1. Now have my Hazmat endorsement I really appreciate the course. They got it in the registery as Promised with a link where i could See it. This team does everything they say they will and is 100% NOT a scam or ripoff. Thank you!
KB
Feels like cheating.
This felt like cheating to be honest. I waited at the DMV for 3.5 hours and the lady told me at 1605 that she doesn't think I'll have enough time to take tanker and hazmat. I told her all I needed was 5 minutes. I sat down at 1620 and stood up at 1626 (took an extra minute oops) and told her I was done. She looked at me like I had 3 heads and was amazed that I'd passed so quickly. This program will make you 100% within days.
JR
The perfect course to take for hazmat.
The way it is laid out to learn in segments was great but the most helpful thing for me and I think anyone else that may take the hazmat course is the “Hint” button that help me out a lot! I highly recommend “Driving-Tests.Org
RS
Easily Passed On The 1st Try!
I literally would not have received my HazMat & Tanker endorsements without this program. Practice makes perfect and with the help of this program, I passed my HazMat and Tanker knowledge exams without missing a single question! If you need to learn/study quick for your knowledge tests, this is the program for you! 10/10
C
Best resource to pass any state Cdl hazmat test.
I studied practice tests provided for my state, and those tests was exactly what my state administered. Scored 100% with ease!
WH

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