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Illinois CDL Class B Practice Test 2025

Average pass rate for CDL tests in Illinois: 64%.
Average pass rate for this test: 52%.
Hard
9 min
Score distribution:
90-100=>0%
80-89=>33%
70-79=>33%
60-69=>0%
<60%=>33%
Avg. first-try score: 70%

Before you can begin a commercial driving career in Illinois, you must complete the licensing process and get a Commercial Driver’s License (CDL). Aspiring drivers who will be engaged in so-called “non-excepted commerce” must complete a DOT medical exam. You will also need to pass a vision test, provide identification documents, and pay the licensing fees. The official general knowledge exam will evaluate your understanding of pre-trip inspections, cargo handling, hours-of-service rules, and your responsibilities as a commercial driver. A minimum score of 80% is required to pass, leaving little room for error.

Illinois CDL Class B Practice Test 2025
IL commercial driver's license
Based on the official IL CDL HandbookHandbook‑based (2025) + exam‑taker feedback
39 IL students practicing now
• 655 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 Illinois drivers who passed first try

Verified student reviews • Shared with permission

Teaches you everything you need to know.
Passed my hazmat test in only 24 hours of studying the material. I loved my experience and will forever recommend.
DR
Is helpful. It is probably the most in-depth program.
It is helpful. It is probably the most in-depth program that I have ever seen. It will give you the opportunity to learn everything you need to know to take your testing. As far as my schedule goes, it was really helpful to be able to do something online and not in person, on my own time and at my own progression level, and complete the program as quickly as I could possibly complete it. I was also able to go back and retake things, retest, and relearn some of the knowledge that I needed to learn in order to upgrade my license.
S
Driving Tests is easy and simple.
Driving Tests is a great place to study. It really helps you prepare for any exams that you wish to take at the DMV. I love how simple it is to use and has a very modern look to it, which makes it comfortable to use. Their AI feature also helps a lot too in case you need help with a question. It has helped me obtain my CDL and a HazMat edorsment. I would highly recommend this site to those who want to 100% pass their exams for both a DL or a CDL.
JM
49 year old test taker.
This site is amazing being older now I don’t absorb as much information and retain it like I use to but with this site I’m able to see where I am and the more I study and take these test I’ve been able to pass the Illinois cdl on the 1st try after failing three times in a row before I got the site
B
I must said and you have my #1 topapp….
I must said and you have my #1 topapp that i recommend anyone and everyone taking this test to achieve their goals in CDL driving take this practice test to take this site and you will achieve you will pass I am a witness my right hand of God best app ever it's been 32 years since I took in this test or any of these tests I was the first African America in Chicago Illinois to receive my CDL license and I have not failed yet God bless
JB

About the Illinois CDL

To expand your career opportunities, you should also pass the official air brakes knowledge exam. Doing so will remove the L restriction from your CDL, allowing you to operate commercial vehicles equipped with air brakes. If you are completely new to commercial driving, the official Illinois Commercial Driver’s License Study Guide (Illinois CDL Handbook 2025) will teach you the basics. You should read its contents multiple times during your learning phase.

Our Illinois CDL Class B Practice Test has 50 questions with multiple answer choices. Since only one answer is correct for each question, you should take your time and think before making a selection. Read every question twice and, if you need help, you can request a hint from our automated assistant. To reflect the latest updates brought by DMV rules and state law, we keep our practice tests up-to-date. This practice test has been recently updated for December 2025, so you will always practice with the latest version.

When you train with this practice test, your progress is automatically saved in your browser. If you come back later, you can pick up right where you left off without losing your results. Keep in mind that this works only if you are not using private browsing mode (such as incognito mode in Google Chrome). If you are in private browsing mode, your progress will be reset once you close the window.

Each study session gets you closer to your dream career. Start today and train with our Illinois CDL Class B Practice Test regularly. With repetition, you will master commercial driving theory and ace the official general knowledge exam on your first attempt.

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