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Missouri Hazmat Test

Missouri's I-70 moves over 20,000 tons of hazmat daily – you'll need to know the rules to drive it safely.

147

Questions

80%

To Pass

Minutes

147 questions · 40 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Missouri CDL handbook and FMCSA regulations.

About the Missouri Hazmat Test

Missouri's highways – especially I-70, I-44, and I-55 – see heavy hazmat traffic every day. From gasoline tankers rolling through St. Louis to anhydrous ammonia trucks crossing rural farm roads, you'll need to understand placarding, loading, and emergency response. Our practice test focuses on what Missouri drivers face most.

Weather here changes fast. Summer heat can cause liquid cargo to expand, while winter ice on I-44 demands extra stopping distance. You'll get questions that cover these real-world conditions – because Missouri examiners expect you to handle them.

Missouri's economy relies on agriculture, manufacturing, and fuel transport. That means hazmat drivers often haul ethanol from corn fields near Kansas City or chlorine for water treatment plants along the Mississippi. This test helps you study the specific materials you're most likely to carry in our state.

Don't waste time on generic questions. Our Missouri Hazmat test pulls from the latest 2026 CDL manual. Each question includes a clear explanation, so you learn why the answer is right – not just memorize it.

Topics Covered

✓Hazard classes and divisions – Missouri haulers commonly transport Class 3 flammable liquids (gasoline, ethanol) and Class 2 gases (propane, anhydrous ammonia).

✓Placarding and marking – you've got to get the right placards for the loads you'll see on Missouri roads, from I-70 to rural FM roads.

✓Loading and unloading procedures – Missouri's many loading docks in St. Louis and Kansas City have specific weight and securement rules.

✓Safe driving practices – winter weather on I-44 and summer heat on I-55 change how you handle hazmat. We cover both.

✓Emergency response – know what to do if you spill hazmat near a Missouri waterway or in a dense urban area like downtown St. Louis.

✓Security and terrorism awareness – Missouri hazmat drivers must pass a federal threat assessment, and this test reviews the key security points.

Study Tips

First, grab the latest Missouri CDL manual from the DMV website. Our practice test follows that manual exactly – no outdated information. Focus on the Hazardous Materials section (typically Chapter 9). Don't skip the 'loading and unloading' part; Missouri examiners ask about it a lot.

Take this practice test at least twice. After your first attempt, review every question you missed. Then retake it. Aim for 90% or better before you schedule your DMV test. You'll also need a valid medical card and to pass a federal background check before you get your Hazmat endorsement.

Schedule your written test at any Missouri DMV office that offers CDL services. You don't need an appointment at most locations, but call ahead to check wait times. Bring your driver's license, social security card, and $10 fee (cash or check). Pass the test, and you're one step closer to hauling hazmat across the Show-Me State.

Missouri Specific Information

You can take the Hazmat knowledge test at any Missouri DMV office that provides CDL services. Popular locations include the Jefferson City DMV (301 W High St), the St. Louis North County office (10020 Washington St), and the Kansas City Downtown office (1000 Broadway St). Most offices accept walk-ins, but we recommend arriving early – especially on Mondays and Fridays.

The test fee is $10 (plus any additional CDL endorsement fees). You'll need to pay by cash or check; credit cards aren't accepted at all locations. Bring your Missouri driver's license, proof of Social Security number, and your current DOT medical card if you have one. If you don't have a medical card yet, you can still take the knowledge test – but you'll need it before you get your Hazmat endorsement added to your CDL.

Don't forget the TSA background check. After you pass the knowledge test, you must apply for a Hazardous Materials Endorsement Threat Assessment (HME) online or at a TSA enrollment center. This takes a few weeks, so plan ahead. Once you clear that, visit your DMV office to pay the endorsement fee and get your updated CDL with the Hazmat endorsement.

Frequently Asked Questions

Do I need a TSA background check for a Missouri Hazmat endorsement?

Yes, you do. After you pass the written test, you'll need to apply for a Hazardous Materials Endorsement Threat Assessment through TSA. It costs $86.50 (as of 2026) and takes 4-6 weeks to process. You can't get the endorsement without it.

Where can I take the Missouri Hazmat written test?

You can take it at any Missouri DMV office that offers CDL services. Major ones include Jefferson City, St. Louis (North County and South County offices), Kansas City Downtown, Springfield, and Columbia. Walk-ins are allowed, but hours vary – check the official DMV website before you go.

How many questions are on the Missouri Hazmat test?

The actual DMV Hazmat test has 30 questions. You need to get at least 24 correct (80%) to pass. Our practice test matches that format perfectly.

Can I use a hazmat endorsement without a CDL in Missouri?

No, you must have a valid CDL first. The Hazmat endorsement is added to your CDL – you can't get it on a regular driver's license. You'll also need a current DOT medical card.

What happens if I fail the Hazmat test in Missouri?

You can retake it the same day at most DMV offices, but you'll pay the $10 fee again. If you need more study time, there's no limit on how many times you can take it – but you'll have to wait until the next business day if the office is closing.

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content