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IL
50 Questions

Illinois CDL Practice Test

Based on the Official Illinois SOS CDL Manual

80%
Passing Score
50 Questions
Section: General Knowledge
Source: Illinois Secretary of State CDL Study Guide

Test Format Breakdown

General Knowledge50 Q / 40 to pass
Air Brakes25 Q / 20 to pass
Combination Vehicles20 Q / 16 to pass

Minimum passing score: 80%

Illinois Test Fees

CLP Permit$30
CDL License$60
Road Test$50
Retake wait: 7 days

State-Specific Rules

Illinois has special rules: Illinois tollway requirements. Make sure to study these sections.

Question 1 of 500 answered
IL CDL Practice Test

In Illinois, what is the minimum age to obtain a Commercial Driver's License?

PASSED THE PRACTICE TEST?

Your Next Steps to Getting a CDL in Illinois

Now that you have practiced, here is what you need to do next:

Study Tips for the Illinois CDL Exam

  • 1.Download and read the official Illinois SOS CDL
  • 2.Focus on Illinois-specific rules like speed limits, weight restrictions, and local exemptions
  • 3.Take this practice test multiple times until you consistently score above 80%
  • 4.Review explanations for questions you miss to understand the reasoning

FAQ: Illinois CDL Test

Common questions about taking the CDL test in Illinois

How hard is the Illinois CDL test?

The Illinois CDL test is challenging but very passable with proper preparation. You need to score 80% to pass. Most students who practice with our free tests and study the official Illinois SOS handbook pass on their first attempt.

Common mistakes to avoid:

  • Illinois Tollway I-Pass requirements
  • Chicago traffic regulations
  • Winter driving requirements

Can I take the Illinois CDL test in Spanish?

Illinois currently does not offer the CDL test in Spanish. Both written and road tests must be taken in English. We recommend studying with our bilingual practice tests to prepare.

How long is my Illinois CLP valid?

Your Illinois Commercial Learner's Permit (CLP) is valid for 180 days (6 months). You must complete your ELDT training and pass the CDL skills test before it expires. If it expires, you'll need to retake the written tests.

What happens if I fail the Illinois CDL test?

If you fail the Illinois CDL test, you can retake it after 7 days. You'll pay a retest fee ($50). There's no limit on attempts, but your CLP must remain valid. Use our practice tests to study the areas where you struggled.

Where can I find CDL schools in Illinois?

We have multiple cities with FMCSA-verified CDL schools in Illinois.

View all Illinois CDL schools →
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Disclaimer: This practice test is for educational purposes only and is not affiliated with or endorsed by the Illinois SOS or the FMCSA. Questions are based on the publicly available Illinois CDL Manual and are designed to help you prepare for the official exam. Always study the official Illinois CDL handbook for the most accurate and up-to-date information.