MO CDL HazMat Practice Test 3 2025

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.

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 2025). 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!