Illinois CDL — test facts & training hub
Illinois CDL testing follows the national model — same test lengths, same 80% pass mark. One Illinois quirk to know up front: driver licensing here runs through the Secretary of State, not a DMV. The facts first, then train.
50General Knowledge questions · 80% to pass
25Air Brakes questions · 80% to pass
20Combination questions · 80% to pass
80%Pass mark on every Illinois CDL knowledge test
Good to know in Illinois
- One national bank: Illinois' CDL Study Guide is built on the federal model manual, so the national question banks in our trainer cover the substance of the Illinois tests. Confirm Illinois-specific items in the official study guide.
- Fees and facilities: Illinois Secretary of State fees and facility rules change periodically. Check the current figures in the Illinois CDL Study Guide and on the official Secretary of State site before your visit — we won't invent a number.
- Retakes: if you miss the 80% line, you can retest — the smart move is to fix your weakest manual sections first. Our failed-test guide and the 3-day rescue plan lay out how.
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