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  • 0  (6 mistakes allowed to pass)

Free KS 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 Kansas, try our KS 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 KS CDL Diagnostic Test 2025
Commercial Driver's License
Based on official KS 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)
Verified for accuracy November 2025
Methodology & Editorial Policy

5 min to complete
Available in EN and ES

What to expect on the actual KS permit test

50

questions

40

correct answers to pass

80%

passing score

Real Kansas drivers who passed first try

Verified student reviews • Shared with permission

Great study guide for Kansas CDL.
Almost all the questions were in the study guide were on the tests! The exams that i took consisted of the General Knowledge, School Bus, Passenger and Air Brakes. I only read the sections of the CDL Manual the applied to my test and I passed all with ease! Like I said, great study guide.
R
Passed the test the first time.
I passed the test the first time! I swear I studied the night before and passed, my employer couldn't be more pleased! Thank you so very much!
R
This was a great experience all around.
I've been a class A tanker driver for many years but didn't know much at all about hazmat. Long story short I wound up needing the hazmat endorsement and had very little time to make it happen. I passed the course with 99% in one day and results were sent to Fmcsa immediately and on a Saturday. Monday morning I aced the exam as the test was easy. The course covered everything that was on the exam.
TM
I needed to renew my CDL.
Taking the Hazmat endorsement test was required. After drilling on the practice tests, I went to the DMV to take the real test, and it was a breeze. I passed as expected. Would recommend to anyone needing to get a cdl/endorsements.
SL
Amazing.
Failed my CDL G.K exam the first time on my own after studying for hours at a time. Studied it for 3 days passed General knowledge passed passenger and air brakes within 7 days of purchase. I would strongly recommend this program
SG
Awesome 😎.
Passed my tanker and hazmat Endorsement tests. Only missed one question. 100% fool-proof. Gonna keep until I take my doubles and triples test. Currently I’m studying for my combination test
T

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