- Updated for January 2025
- Based on 2025 MO commercial driver's license manual
Free Missouri CDL HazMat Practice Test 2025
Considering adding the Hazardous Materials (Hazmat) endorsement to your Commercial Driver’s License (CDL)? It’s a great idea that can significantly increase your job prospects and income if you obtain it. The U.S. government has determined what cargo is considered hazardous and the Hazmat endorsement permits drivers to transport these materials. These materials range from explosives and industrial chemicals to radioactive materials and even infectious substances. But keep in mind that the most important objective of the endorsement process and these U.S. regulations is to ensure your safety and that of the people and environment you drive through.
There are multiple steps involved in obtaining a Hazmat endorsement, including a Transportation Security Administration (TSA) fingerprinting and background check, and a knowledge test that is administered by the DOR. The test covers federal regulations, safe handling practices, packaging, quantity, and the configurations allowed for hazardous cargo. Missouri’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) (Missouri CDL Handbook 2025). Also note that the minimum age for the Hazmat endorsement is 21 for both interstate and intrastate driving in Missouri.
With all of that in mind, let’s get back to the potential income increase available with this endorsement. Some online sources state that the Hazmat endorsement generally adds 10–20% to a driver’s pay! In Missouri, there are multiple industries with cargo transport that require a Hazmat endorsement. If you don’t have it, that work won’t be available to you. Missouri industries making substantial use of Hazmat transport include fossil fuels, manufacturing, agriculture (pesticides and fertilizers), and pharmaceuticals. Also, {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 Missouri DOR Hazmat Endorsement practice tests are carefully designed to skip over all of the extraneous information you’ll find during an internet search and go straight to the relevant material. Our tests purposely mimic the structure and content of what you’ll face on the official DOR test.
Once you feel ready, just take the necessary documents to the DOR, submit your fingerprints and background check information, pay the fees, and take the test. What are you waiting for? Add your endorsement and enjoy the added benefits.
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual MO DOR exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- When shippers package the material, they are trying to
- Where are the two main places that the hazardous material identification number appears?
- Besides the shipping papers and the packages, the other two places where the hazardous material identification number must appear are
- If you are already carrying 100 pounds of silver cyanide, what precautions must you take if you are given papers at a dock to carry 100 cartons of battery acid?
- If you are carrying Division 1.2 or 1.3 materials, how far away must you park from the traveled portion of the roadway?
- Which of the following three hazard classes should NOT be placed into a temperature-controlled trailer (one with a heater/air conditioner unit)?
- What action should you take if you discover your hazardous materials shipment leaking at a rest stop but there is no phone available?
- You must NEVER smoke or perform any activity involving fire within 25 feet of
- Your engine runs a pump when you are delivering compressed gas. After finishing the delivery, when should you turn off the engine?
- The Emergency Response Guidebook (ERG)
- Which of the following are necessary qualifications for non-bulk packaging?
- Which of the following is NOT an acceptable type of marking for hazardous materials?
- Which of the following materials are acceptable floor liners for moving Division 1.1 or 1.2 materials?
- How often should you check the tires on a placarded trailer that has dual tires?
- To determine if you need to use placards, which of the following is NOT something you need to know?
- What are the major differences between cargo tanks and portable tanks?
- Which of the following hazard classes uses a transport index to determine how much of it can be loaded on a single vehicle for transport?
- A safe haven is
- If you are carrying Division 1.2 or 1.3 materials, how far away must you park from a bridge, tunnel, or building?
- What is a technical name?
- Cargo tanks are
- A placarded vehicle must carry a fire extinguisher with a minimum rating of
- In what location must you keep your shipping papers that describe any hazardous materials?
- Do you need to stop before a railroad crossing if you are hauling 100 pounds of Division 4.3 materials?
- What is the purpose of a driver placarding his or her vehicle?
- A hazard class name or ID number may not be used to describe
- Placards must be at least _______ from all other markings.
- At a rest stop, you discover that your hazardous materials shipment is leaking but there is no phone available. What do you do?
- If an "X" or an "RQ" is in the HM column of a shipping paper entry, then
- NO ONE may smoke within 25 feet of any vehicle that contains explosives, oxidizers, or
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