Free Illinois CDL Permit Practice Test
10 real General Knowledge questions from the same bank our students use. No account, no email needed. You see the correct answer after each question, and your score at the end.
Take the Illinois CDL Permit test
General Knowledge is the test every CDL applicant sits, whatever class they are after. Passing it earns the commercial learner's permit, so nothing else in the process starts until this one is done.
- 10 questions, from the 81-question General Knowledge bank, one for each key manual topic
- Practice mode: the correct answer and manual reference show after each question
- 80% is a pass, the same standard as the real Illinois CDL knowledge test
Takes about 3 minutes. Keyboard: A to D to answer, Enter for next.
At the end you get your score, the correct answer for anything you missed, and the CDL manual section to go back to. No account needed, and you can retake it as often as you like.
Already included in Illinois Class C with Passenger CDL Study Material and Illinois Class B CDL Study Material. On its own it is Illinois CDL General Knowledge Study Material. Not sure what you need? The CDL Selector works it out from a few questions.
About the Illinois CDL permit test
The permit test is the General Knowledge test: one written exam, two names. It is the exam every CDL applicant sits, whatever class of license they are working toward. The questions come from the Illinois CDL manual, they are multiple choice, and you need 80% to pass. Illinois Secretary of State gives the test, and passing it is what earns your commercial learner's permit, the permit you hold before taking the skills test in a truck.
What it covers
Our 10 free questions and the full 81-question General Knowledge bank are drawn from these manual sections:
- Vehicle Inspection
- Basic Control of Your Vehicle
- Shifting Gears
- Seeing
- Communicating
- Controlling Speed
- Managing Space
- Seeing Hazards
Endorsements such as HazMat, Tank, Passenger and School Bus are separate written tests on top of this one. See which Illinois CDL endorsements you need before you book anything, because the endorsement you are missing decides which tests you sit.
What Illinois requires
- Skills tests are only given at designated CDL facilities, so check the list before assuming your local office tests.
- The CLP holding period is the federal minimum of 14 days.
- Certified third-party schools can test their students, which is often faster than a state facility slot.
Checked against Illinois Secretary of State on September 16, 2026. Rules change, so confirm anything that affects your booking before you travel.
Try another free CDL practice test
Each one is a different knowledge test, with real questions from the same bank our students use. No account and no email needed for any of them.
- Free Air Brakes practice test 7 questions
- Free Combination Vehicles practice test 8 questions
- Free HazMat practice test 6 questions
- Free Tanker practice test 6 questions
- Free Passenger practice test 6 questions
- Free School Bus practice test 8 questions
- Free Doubles & Triples practice test 6 questions
Where to go next
Work out which license class you need, then study the test that goes with it:
- Illinois CDL classes: what Class A, B and C each let you drive.
- Illinois CDL endorsements: H, N, P, S, T and X, and who needs each.
- CDL requirements: the age, medical, ELDT and permit steps around the knowledge test.
- The CDL skills test: what comes after the knowledge tests, and the 14 day permit rule.
- What CDL do I need, by vehicle: the class and the tests for a dump truck, box truck, school bus, tanker and more.
- Illinois CDL study material: the full study guides, practice tests and narrated audio.
Other free CDL practice tests
Each CDL knowledge test is a separate exam, and every one of them has a free practice test here:
- Free Air Brakes CDL Practice Testa restriction removal, not an endorsement
- Free Combination Vehicles CDL Practice Testa core Class A test
- Free HazMat CDL Practice Testthe H endorsement
- Free Tanker CDL Practice Testthe N endorsement
- Free Passenger CDL Practice Testthe P endorsement
- Free School Bus CDL Practice Testthe S endorsement
- Free Doubles & Triples CDL Practice Testthe T endorsement
See all eight free CDL practice tests →
Common questions
Is the Illinois CDL permit test the same as the knowledge test?
Yes. They are the same written exam. It is the General Knowledge test, and passing it is what earns your commercial learner's permit (CLP), so people call it the permit test. A CDL permit practice exam, pretest or mock test all mean practice questions for this same test.
What score do I need to pass the Illinois CDL knowledge test?
You need 80% to pass. Miss more than that and you retake the test, so the goal while studying is to be comfortably above 80%, not just at it.
Where do I take the Illinois CDL knowledge test?
At Illinois Secretary of State. Passing the General Knowledge test is what earns your commercial learner's permit, which you hold before the skills test.
Is this free test the real Illinois CDL exam?
No. These are 10 real questions from the same General Knowledge bank our paid study material uses, so the style and difficulty match what you are studying for. The official exam is given only by Illinois Secretary of State.