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  • 0  (6 mistakes allowed to pass)

Free WI CDL Diagnostic Test 2025

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

To get a rough idea of how much you know about commercial driving rules in Wisconsin, try our WI CDL diagnostic test. It contains 30 multiple-choice questions on a variety of topics in commercial driving: air brakes, hazardous materials, buses, combination vehicles, and tanker trucks. This test will help you quickly identify gaps in your knowledge of commercial driving, which will be especially useful if you’re just starting to prepare for the CDL knowledge exams. Each practice question includes a picture and has four possible answers. Choose the most complete and correct answer for each question. Each question also comes with an optional hint if you need it and an explanation of the correct answer. Try our CDL diagnostic test and see whether you are ready for the real thing. Good luck, and drive safely!

Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives
Free WI CDL Diagnostic Test 2025
WI commercial driver's license
Based on official WI 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

5 min to complete
Available in EN and ES

What to expect on the actual WI permit test

50

questions

40

correct answers to pass

80%

passing score

Real Wisconsin drivers who passed first try

Verified student reviews • Shared with permission

I did not even look at the DMV manual.
I followed the program and retook my incorrect questions. I got 100% on my haz mat test at the DMV. Amazing prep program! I would totally recommend this to anyone!
KR
Got my cdl and tanker endorsement last year and wanted to.
I got my cdl and tanker endorsement last year and wanted to get my hazmat endorsement also but the school I went to charged 500 dollars for a day and a half for hazmat training I looked for other alternatives and found this website 100 dollars for 30 days and it definitely paid off it less than 15 mins if that to pass the test and get my hazmat endorsement I highly recommend this program.
N
I took hazmat and tanker finished both….
I took hazmat and tanker finished both in about 5 minutes with 100% on both. every question on both tests were in the practice test!
CW
Love this testing platform.
I studied for 2 days and passed my cdl test with flying colors! Trustpilot even said I only had a 50% chance of passing my test. The tests helped a lot! I would recommend to anyone going it alone in this process.
MH
Passed on the first try.
I needed to upgrade my class A CDL to include a Tanker/Hazmat endorsement. I looked at a couple of other companies, but this was the most reasonable. The website was user friendly and I passed on my first try! I also was able to ask a couple of questions online and got responses and my questions answered. It was a good overall experience.
R

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