Illinois CDL practice test
Prepare for Illinois CDL and CLP testing with original questions on the General (Core) exam, air brakes, endorsements, testing appointments, ELDT, and state-specific rules. Review the explanation and official source after each answer.
Practice questions
Choose a topic or mix topics, then check each answer with its explanation and manual reference.
Illinois CDL written-test format
Illinois lists a 30-question General (Core) knowledge test and an 80% passing score. Applicants may need additional tests for a Class A combination vehicle, air brakes, or applicable endorsements. Illinois lists a 90% passing score for the School Bus test. Use the current Secretary of State study guide to confirm the sections that apply to your credential.
The state describes a three-part skills and drive exam: Pre-Trip Inspection, Basic Control Skills, and Driving/Road Test. A CLP must be held for at least 14 calendar days before skills testing, and the test vehicle must represent the class sought.
Illinois endorsement and appointment notes
Illinois permits N, P, and S endorsements on a CLP; H and X are not allowed on the permit. HazMat applicants need TSA security threat assessment clearance. The state also has Illinois-specific School Bus Permit and Charter Bus requirements, so read those sections in the official guide if they apply to your work.
These independent questions are study aids, not official or confidential test questions. Check the Secretary of State’s current CDL page before applying or scheduling.
USA Exam Practice is independent and is not affiliated with the Illinois Secretary of State, FMCSA, or TSA. CDL rules and procedures can change; official state and federal materials control.