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  • 0  (6 mistakes allowed to pass)

Free MD CDL Diagnostic Test 2025

Average pass rate for CDL tests in Maryland: 64%.
Average pass rate for this test: 47%.
Hard
5 min
Score distribution:
90-100=>0%
80-89=>0%
70-79=>0%
60-69=>28%
<60%=>72%
Avg. first-try score: 50%

To get a rough idea of how much you know about commercial driving rules in Maryland, try our MD 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!

Free MD CDL Diagnostic Test 2025
MD commercial driver's license
Based on the official MD CDL HandbookHandbook‑based (2025) + exam‑taker feedback
1 MD students practicing now
• 17 completed today
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 Maryland drivers who passed first try

Verified student reviews • Shared with permission

Took this. I went down to the motor vehicle, didn't miss one.
I took this. I went down to the motor vehicle, didn't miss one on any of my tests, nothing! I walked right through it. It was very simple. Like I said, you know, it gives you a multiple choice. You make your answer—if you get it wrong, on the bottom, it gives you a brief paragraph of what the correct answer is. And it was just so helpful. I mean, that's what I like most about it—it was so easy, and I've recommended it to quite a few of my friends.
R
Program is definitely.
This program is definitely I hope more people use this program and have the success in passing the CDL B and others that it offers. I am extremely grateful
V
The best study guide for MVA CDL knowledge tests.
I finished my Tanker endorsement test in less than 7 mins! I finished my Double/Triple in 8 mins and few seconds! I took both tests the same sitting back-2-back. Your learning tools are AWESOME!
OBF
Really trust this website.
After hours of searching online for a trusted website where I can complete my hazmat ELDT, I am so glad I found Driving-tests! The website it self looked legitimately, it had many reviews/endorsements that made it seem like a safe website to use, that to me was a big deal, all the other websites that I looked at just seemed very sketchy, and it didn’t feel safe enough for me to put down any personal information. The price seemed very reasonable compared to others as well.
DG

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