CDL Practice Tests — Illinois
Free practice tests for the Illinois CDL exam, written from the Illinois Secretary of State handbook and federal standards.
Official handbook: Illinois Secretary of StateChoose a practice test
General Knowledge
50-question practice · 50-question mock exam · 80% to pass
IllinoisAir Brakes
25-question practice · 25-question mock exam · 80% to pass
IllinoisCombination Vehicles
20-question practice · 20-question mock exam · 80% to pass
IllinoisHazardous Materials
30-question practice · 30-question mock exam · 80% to pass
IllinoisTanker
20-question practice · 20-question mock exam · 80% to pass
IllinoisDoubles and Triples
20-question practice · 20-question mock exam · 80% to pass
IllinoisPassenger Transport
20-question practice · 20-question mock exam · 80% to pass
IllinoisSchool Bus
20-question practice · 20-question mock exam · 80% to pass
Step-by-stepIllinois CDL Licensing Guide
How to get licensed in Illinois, step by step.
About the Illinois CDL exam
The Illinois CDL exam is administered by the Illinois Secretary of State. Like every state, Illinois adopts the federal standards as a baseline and adds state-specific requirements, fees, and procedures.
- Exam / licence fee: approximately $60.
- Skills testing: Illinois Secretary of State CDL Testing Centers.
- Illinois operates dedicated CDL Testing Centers separate from standard Secretary of State facilities, with appointments required for skills testing.
To get started, read the official Illinois handbook (linked above), practice with the tests on this page until you consistently score above 80%, and then schedule your exam with the Illinois Secretary of State.
What's in the Illinois exam: Practice tests for the Commercial Driver's License written exam. Questions reflect the Federal Motor Carrier Safety Administration (FMCSA) Commercial Driver's License Manual that all states adopt as the basis for their CDL exams.
Recommended study materials
CDL Study Guide (Trivium)
Complete prep for all CDL written tests: general knowledge, air brakes, combination vehicles, hazmat, and all endorsements. Includes full-length practice tests.
Check Price → Study guideCDL Practice Tests & Flashcards (Accepted Inc.)
600+ practice questions covering every FMCSA knowledge area, plus 400 flashcards for endorsement prep.
Check Price → Study guideMaster the CDL Truck Driver's License (Arco)
Arco's classic CDL prep with in-depth FMCSA manual coverage, endorsement chapters, and scored practice exams.
Check Price →As an Amazon Associate, CJ Affiliate, and AWIN publisher we earn from qualifying purchases. Links above are affiliate links. Full disclosure →
Practice test FAQs
How do I get a CDL license in Illinois?
In general you must meet the eligibility requirements, complete any required education or training, and pass the required knowledge test (and, where applicable, a skills test) administered through the Illinois Secretary of State. The exact steps, fees, and documents are set by Illinois and are covered in the guide above.
Is the CDL exam different in Illinois?
The core knowledge tested is similar across states, but Illinois sets its own specific rules, procedures, passing requirements, and any state-law content. That is why it is important to study materials specific to Illinois, which our CDL practice tests are written to reflect.
Are these Illinois practice tests free?
Yes. All of our Illinois CDL practice questions are completely free, with no sign-up or payment required, and every question includes a full explanation. You can start practicing immediately on desktop or mobile.
How should I prepare for the CDL exam in Illinois?
Study the official CDL materials from the Illinois Secretary of State, focus on the most heavily tested topics, and take practice tests until you consistently score above the passing threshold. You can start with the Illinois CDL practice tests for this state.
Where can I learn more about the CDL exam format and scoring?
Our CDL exam guide explains the test format, scoring, what is covered, and study strategies that apply in every state, including Illinois.