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Free Illinois CDL HazMat Practice Test 2025
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Based on 2025 IL commercial driver's license manual
- Triple-checked for accuracy
- Updated for March 2025
Adding the Hazardous Materials (Hazmat) endorsement to your Commercial Driver’s License (CDL) is a great way to open new job opportunities and increase your earning potential in Illinois. The Hazmat endorsement permits drivers to transport materials that the U.S. government has deemed hazardous. These materials range from explosives to certain types of fuel and industrial chemicals to radioactive materials and infectious substances. The most important objective of this endorsement process is to ensure your safety and protect the people and environment in your driving area.
To add this valuable endorsement, you’ll need to pass a Transportation Security Administration (TSA) fingerprinting and background check and the DMV knowledge test. The knowledge test covers federal regulations, substance handling, material packaging, quantity limits, and transport configurations for hazardous materials. Illinois’s knowledge test is made up of 30 questions and must be passed with a score of at least 80% (24 out of 30 answers must be correct) (Illinois CDL Handbook 2025). Also note that the minimum age for the Hazmat endorsement is 21 for interstate travel, though Illinois does allow drivers aged 18 and older the endorsement when not crossing state lines.
With all of that in mind, let’s get back to the potential income increase available with this endorsement. According to the 2025 Illinois CDL manual, the Hazmat endorsement generally adds 10–20% to a driver’s pay! In Illinois, there are multiple industries with cargo transport that require a Hazmat endorsement. If you don’t have it, those jobs won’t be available to you. Illinois is substantial in its fossil fuel transport, manufacturing, agriculture (pesticides and fertilizers), and pharmaceuticals, and {state-name) contains more nuclear power plants than any other state. This sounds amazing and a little daunting, right? It doesn’t have to be complicated at all.
Our online Illinois DMV Hazmat Endorsement practice tests are strategically designed to circumvent all of the extraneous information you’ll come across during an internet search and go straight to the relevant material. Our tests are designed to mimic both the structure and content of what you will face on the official DMV test.
Once you feel confidently prepared, you’ll visit the DMV with the necessary documents, submit your fingerprints and background check information, pay any related fees, and take the test.
7 min to complete
Available in EN and ES
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article. 
Verified by Steven Litvintchouk,
Chief Educational Researcher, Member of ACES.
Chief Educational Researcher, Member of ACES.
Pass the first time,
guaranteed with Premium
guaranteed with Premium
What to expect on the actual IL DMV exam
30
questions
24
correct answers to pass
80%
passing score
More IL DMV Written Exam Resources
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