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  • 0 Correct
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Free IL CDL Diagnostic Test 2023

Part of mandatory Entry-Level Driver Training Course Based on 2023 IL commercial driver's license manual Available in EN, ES

What to expect on the actual IL CDL exam

  • 50questions
  • 40correct answers to pass
  • 80%passing score

To get a rough idea of how much you know about commercial driving rules in Illinois, try our IL CDL diagnostic test. It contains 30 multiple-choice questions on a variety of topics in commercial driving: air brakes, hazardous materials, buses, combination vehicles, and tanker trucks. This test will help you quickly identify gaps in your knowledge of commercial driving, which will be especially useful if you’re just starting to prepare for the CDL knowledge exams. Each practice question includes a picture and has four possible answers. Choose the most complete and correct answer for each question. Each question also comes with an optional hint if you need it and an explanation of the correct answer. Try our CDL diagnostic test and see whether you are ready for the real thing. Good luck, and drive safely!

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IL commercial driver's license

Perfect for

  • First-time IL CDL and CLP applicants
  • CDL holders adding endorsements
  • IL CDL renewal applicants

Helpful resources

IL CDL Handbook

View the most recent (2023) official IL CDL Handbook.

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IL CDL Practice Test App

Download our free iOS or Android app and practice for your driving test offline or on the go.

10 Things You Should Do Before Your Driving Knowledge Exam (PDF)

Many people do their best but still get to the DMV overconfident and underprepared because they fail to do some of the simple...

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IL commercial driver's license

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