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  • 0  (6 mistakes allowed to pass)

Free PA CDL Diagnostic Test 2025

Average pass rate for CDL tests in Pennsylvania: 70%.
Average pass rate for this test: 37%.
Hard
5 min
Score distribution:
90-100=>0%
80-89=>9%
70-79=>10%
60-69=>23%
<60%=>58%
Avg. first-try score: 63%

To get a rough idea of how much you know about commercial driving rules in Pennsylvania, try our PA 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
Towing & Trailers
Free PA CDL Diagnostic Test 2025
Commercial Driver's License
Based on the official PA CDL HandbookHandbook‑based (2025) + exam‑taker feedback
20 PA students practicing now
• 71 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 Pennsylvania drivers who passed first try

Verified student reviews • Shared with permission

Follow the plan!
As long as you follow the plan that you are given, you will pass. I passed my Hazmat & Tanker endorsement on the same day.
D
Makes it too easy to pass.
Easy to sign up for and access the Information and practice tests. All the questions on the practice tests were on the PA Hazmat\Tanker tests, passed first time with 0 wrong.
J
Absolutely 💯%.
Absolutely 💯% you spend. I crammed for less than 24 hours and passed my PA CDL general knowledge as well as endorsements for Hazmat, Combination, Doubles/Triples, and Tank IN ONE TRY! The practice exams were tremendously thorough and matched nearly all the questions that I encountered on the actual exams. Don’t waste anymore time or money at the DMV then you absolutely must! Sign up for Driving-Tests and pass the first time!
JB
Honest expierence.
My honest experience with this website has been awesome! I have the cdl book from the dmv here in pa but never really opened it, every time I did I just got really bored, it wasnt working. I'm a hands on type of guy so I always get nervous for written exams. But when I aced all of these tests, I decided to go to the dmv and give it a shot. I went for class a with airbrakes. I was really surprised at how close the questions on my actual test were similar to the ones on this site. If it wasnt for the little money I played for this site, I don't think i would've got my cdl. These guys are great and I'll recommend them to anyone who is attempting their cdl. Thank you so much for helping me advance my career, your help made this process a breeze.
V

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