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It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
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The Centennial State. The freedom you feel while driving through the Rocky Mountains is unmatched, and so are the career opportunities that open up when you add the Hazardous Materials (Hazmat) endorsement to your Commercial Driver’s License (CDL). This endorsement gives you access to an entire sector of specialized hauling jobs that would otherwise be unattainable for you. Moreover, these jobs often come with higher pay, and the sheer number of new opportunities adds more stability to your career. If you’re under 21, you won’t yet qualify for the HazMat endorsement. In the meantime, we highly recommend you check out our suite of Colorado-specific study materials, including the CDL Practice Test and the Colorado Air Brakes Practice Test.
With a Hazmat endorsement, you’re authorized to transport regulated materials such as explosives, industrial chemicals, radioactives, certain fuels, and infectious substances. That list may sound intimidating, but the entire certification process is designed around safety first, protecting you, the public, and the environment.
Our online practice tests are built to mirror the official DMV exam, focus only on the necessary information, and give you immediate feedback and detailed explanations when you miss a question. Furthermore, this practice test is just one of three available within the Colorado-specific practice tests we have developed. Check out another here: https://driving-tests.org/colorado/co-cdl-hazmat-practice-test/.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Your first step is to complete a Transportation Security Administration (TSA) fingerprinting and background check. Since results can take weeks, use that time wisely by preparing for the next step: the DMV HazMat Knowledge Test. This test contains 30 questions, and you’ll need to answer at least 24 correctly to pass. Topics include federal safety regulations, packaging, handling, quantity restrictions, and transport configurations, all based on the official state CDL manual (Colorado CDL Handbook 2025). You are also required to complete the Entry-Level Driver Training (ELDT) for Hazardous Materials Endorsement prior to taking the written exam.
In Colorado, Hazmat-certified drivers are in demand in industries ranging from mining and energy to manufacturing and utilities. Explosives, solvents, propane, gasoline, and oil-and-gas production chemicals are common shipments. Companies like Ball Corporation (Boulder) and Xcel Energy (Denver) depend on drivers with this endorsement.
Once you have your TSA clearance, complete ELDT, and feel prepared from having practiced with our relevant practice tests, head to the DMV office, bring your required documents, pay the fees, and pass the test!
Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2025 CO Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DMV.
