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  • 0  (6 mistakes allowed to pass)

Free FL CDL Diagnostic Test 2025

Average pass rate for CDL tests in Florida: 60%.
Average pass rate for this test: 32%.
Hard
5 min
Score distribution:
90-100=>0%
80-89=>5%
70-79=>8%
60-69=>20%
<60%=>67%
Avg. first-try score: 46%

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

Tricky exam topics covered here:
Skidding & Braking
Steering & Control
Dui & Alcohol Limits
Free FL CDL Diagnostic Test 2025
FL commercial driver's license
Based on the official FL CDL HandbookHandbook‑based (2025) + exam‑taker feedback
46 FL students practicing now
• 110 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 Florida drivers who passed first try

Verified student reviews • Shared with permission

Passed tests very easily.
I passed hree tests for the CDL: the general knowledge, air brakes, and combination vehicles. It took me 35 minutes to pass all three tests. It took me two days to read the manual and do all the practice tests that I bought from you guys. So, if you follow the instructions on driving-tests.org, it will be very easy to pass.
M
Did the general knowledge test and four endorsements.
I did the general knowledge test and four endorsements, and thanks to you guys, I passed them all with flying colors. Three of the tests I got zero wrong, and the other two, I got one wrong on the one and two wrong on the other, but other than that, pointers for those taking that test: make sure you read questions correctly—they're a little bit tricky there. But thanks for the good information you provide with your testing program.
J
The best study guide program I’ve ever used!
Even the FAA test prep programs I used to become a pilot weren’t as good as this. Very well structured you will definitely be ready after completing the program!
CA
Just to let you know that I passed.
I passed just today all three parts of the CDL/Class A exam (General Knowledge, Brakes & Combinations/FDMV), having it taken me less than 40 minutes to complete. I have to say that your system is just excellent. When I sat in today, it was just a piece of cake, once I started taking the General Knowledge test, my confidence just started building. The personal at the Fdmv were surprised as well, for they told me that they had people taking the General Knowledge Part for months without passing it.
PP
I passed.
I passed my CDL permit test in Florida using this subscription. Appreciate you guys. I will still subscribe to this site to teach myself the Pre trip inspection.
TS
I passed 5 exams on the 1st try.
I had zero errors on 4 of the exams. So, I already have my CLP. I don't plan to do anymore work on the CDL until January because I am working for UPS delivering packages during their busy season. The problem I am having now is finding a place in Florida to take the driving part of the CDL. The state delegates that function to the CDL schools. I already know how to drive because I had a CDL until 4 years ago when I retired. But, everyone wants to charge me about,000 to take the driving test. The CDL training laws change on Feb 7th, but it does not effect me because I already have my CLP. The schools act like people have to get their CDL by Feb 7th but they really only need too get their CLP by then.
W
Excellent product.
It absolutely prepares you for taking the Florida CDL test. I took 4 of them, the basic, air, doubles and triples and tankers, I passed all on first try. DMV allows retaking for a small fee, but didn't need it. The different tests are setup perfectly, so if you miss a question, it'll come back at the end. Thank you!
J

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