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  • 0  (6 mistakes allowed to pass)

Free KY 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 Kentucky, try our KY 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 KY CDL Diagnostic Test 2025
KY commercial driver's license
Based on official KY 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 KY permit test

50

questions

40

correct answers to pass

80%

passing score

Real Kentucky drivers who passed first try

Verified student reviews • Shared with permission

Came across driving-tests.
I came across driving-tests.org, and their process and the way they had you do the studying and the tests made the world of difference for, like, both feeling confident and then, you know, the material, but also, like, being able to discern in the question, like, what they're actually after, and finding the best possible answer. Coming to the test today after using this versus the first two times, I felt way more confident, and I think I only missed, like, three questions or four questions on all three tests that I had to take today. So I highly recommend this anyone trying to get their CDL.
H
Everything went fine the study guide was right on and i took.
Everything went fine the study guide was right on and i took test and past just like that!
A
Excellent.
Well, wasn't the first time I used driving-tests.org to prepare to write driving test exam. I used in KY to take my CDL and HME written exams and passed both excellent. This was the reason I returned driving-tests.org to prepare for GA HME endorsement. I followed driving-tests.org recommendations and went through all practice tests and was 100% ready. The written exam on 8/31/2022 was a breeze. It took me less than 10 minutes to finish. I could have obtained a 100% score but due to my own carelessness / mind laziness / arrogance, I got one question wrong. I will always recommend driving-tests.org to people. Thank you driving-tests.org!
FA
I'm in the process of getting Hazmat….
I'm in the process of getting Hazmat and Motorcycle endorsements on my license. I obviously had many choices but I felt like this was my best option. I'm using the site and website, both seem to be slightly different as to what they offer. Look carefully and if you're going to choose just one, I would probably go with website, as it has a course (video) that can be completed and results sent to DMV. I Really Appreciate That FEATURE!
JD
Very thorough.
Well written tests with hints and answers which bring an understanding that sinks in so that you remember. Very thorough videos that are packed with all the info you can stand. A learning path is laid out for you so that as you progress you can sense a mastery of the CDL profession.
Y
The #1 Driving Test Website In The Country!
Driving-tests.org is the best driving test website in the country why? Because everything on this website is explained in full detail and I love the fact that everything is in order. Unlike the very confusing drivers manuals in each state with driving-tests.org everything is in order again especially with the membership. The air brakes test, the General Knowledge Test, the combination vehicle test, and Etc is in order. The driver's manual is very confusing to have all the answers scattered out through the entire book which is ridiculous and it makes it harder for the person that studying any drivers test to pass and the DMV knows that.
MR
Awesome App.
I studied the manual and felt prepared to pass the CDL exam. I took it on 1/10/19 and failed it twice. I was discouraged but started to research online for test applications. I ran into The Driving Test app and gave it a chance. I studied the test examples for over 9 hours. Went to DMV late afternoon on 1/11/19 to retake the test and passed it on the first try. the site is simply amazing!
AG

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