All your missed questions are saved
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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.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All Plans| 90-100 | => | 32% |
| 80-89 | => | 39% |
| 70-79 | => | 21% |
| 60-69 | => | 7% |
| <60% | => | 0% |
Have your Commercial Driver’s License (CDL) and are looking for higher pay and more job opportunities? Adding the Hazardous Materials (Hazmat) endorsement is the perfect way to achieve that! Due to the extra steps, precautions, and specialization required for a HazMat endorsement, employers often pay a premium to secure endorsed drivers.
The U.S. government has classified certain materials as hazardous, and the steps toward certification outlined below are in place to protect you, the public, and the environment. In Missouri, industries like fossil fuels, manufacturing, agriculture, pharmaceuticals, and even nuclear power plants depend on certified Hazmat drivers for their transport needs. Without the endorsement, some of the best-paying work in the industry is off-limits to you.
The Hazmat endorsement legally authorizes drivers to transport sensitive and dangerous cargo. This includes explosives, industrial chemicals, radioactive materials, and infectious substances. To qualify, you must be at least 21 years old. The first major step is to make sure all Entry-Level Driver Training (ELDT) requirements have been met. Second, you’ll need to complete a TSA fingerprinting and background check. This process often takes weeks for results, so you’ll want to submit these requirements and use the wait time to study for the third and final hurdle: the HazMat Knowledge Test administered by the DOR.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
The test covers federal regulations, handling practices, packaging, quantity limits, and allowed cargo configurations. Missouri’s exam has 30 questions with a required minimum passing score of 80% (24 correct) (Missouri CDL Handbook 2026). The test can be quite overwhelming if approached with typical study methods. To make preparation easier, our online practice tests closely mirror the official exam. Also, instead of sifting through irrelevant information, you’ll focus on the material needed on test day. We have an entire set of expert-created practice tests dedicated to the Missouri Hazmat exam. Once you ace this one, check out another one here: https://driving-tests.org/missouri/mo-cdl-hazmat-practice-test/.
After you have confirmed your ELDT requirements have been met, received your TSA clearance, and studied with our practice tests, the rest of the process is pretty easy. You’ll gather your documents, submit your fingerprints and background results, pay the fees, and take the DOR test.
Each endorsement enhances your CDL and opens more job opportunities and higher pay. We have all the materials you need to add Missouri endorsements, remove CDL restrictions like the Air Brakes restriction, and pass general CDL exams, including Combination Vehicles for a Class A CDL. Try all of them!
Driver’s Ed is - nobody wants to set foot inside the DOR. 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 2026 MO 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 DOR.
