🚛 Missouri CDL Hazmat Endorsement
Missouri CDL Hazmat Endorsement — Exam Prep 2026
Prepare for the Missouri CDL Hazmat knowledge test with 500+ practice questions covering FMCSA regulations, placard rules, shipping papers, and security plans. Free to start.
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Missouri CDL Hazmat Test
Administered by Missouri Department of Revenue (licensing); Missouri State Highway Patrol (testing)
30
Questions
80%
Passing Score
24/30
Correct to Pass
~$86.50
TSA Assessment
Missouri CDL Hazmat — What to Expect
In Missouri, the CDL Hazmat (H) endorsement is issued by the Missouri Department of Revenue (licensing); Missouri State Highway Patrol (testing). In Missouri the license is issued by the Department of Revenue, but the Hazmat written test must be taken at a Missouri State Highway Patrol examination station; the TSA screening is federal via IdentoGO.
The knowledge test has 30 questions and requires an 80% passing score — at least 24 correct. The exam is based on the federal FMCSA regulations under 49 CFR, which are the same in all 50 states, so the study material does not change from state to state.
Before the H endorsement can be added to your Missouri CDL, you must pass a TSA Security Threat Assessment (background check), about $86.50, at an authorized enrollment center — processing takes 2–4 weeks, so apply early.
Endorsement fee: Varies — confirm with the Missouri Department of Revenue. Retake wait: Varies by office.
What the Practice Covers
Web Practice Features
5 Free CDL Hazmat Practice Questions
No account required. These reflect the federal (49 CFR) content on the Missouri CDL Hazmat knowledge test.
Q1.Which endorsement must a CDL driver have to transport hazardous materials in amounts requiring placards?
Q2.Hazard Class 2 is comprised of:
Q3.Which placard uses a blue background?
Q4.Most hazmat classes require a placard only when the aggregate gross weight equals or exceeds:
Q5.The identification number on shipping papers and packages must be preceded by:
Study Smarter for the Missouri CDL Hazmat Test
VoltExam CDL Hazmat web practice covers every topic tested — hazmat classes, placard thresholds, shipping papers, security plans, and driver responsibilities. Timed exam mode simulates the real test.
Web access works in your browser. Native iOS and Android apps are separate purchases for offline mobile study.
Missouri CDL Hazmat — Frequently Asked Questions
How many questions is the Missouri CDL hazmat knowledge test?
The CDL Hazmat endorsement knowledge test has 30 questions, and you must answer at least 24 correctly (80%) to pass. In Missouri the test is administered by the Missouri Department of Revenue (licensing); Missouri State Highway Patrol (testing). The content is federal (49 CFR) and is the same in every state.
Where do I take the Missouri CDL hazmat test?
In Missouri the license is issued by the Department of Revenue, but the Hazmat written test must be taken at a Missouri State Highway Patrol examination station; the TSA screening is federal via IdentoGO.
How much does the Missouri CDL hazmat endorsement cost?
Varies — confirm with the Missouri Department of Revenue. Separately, federal law requires the TSA Security Threat Assessment, which costs about $86.50 and is paid to the TSA enrollment provider — not to the state.
Do I need a background check for the hazmat endorsement?
Yes. Federal law requires every CDL Hazmat endorsement holder to pass a TSA Security Threat Assessment before the H endorsement is issued. You apply at an authorized TSA enrollment center; processing typically takes 2–4 weeks. You can take the written knowledge test while the check is pending, but the endorsement is not issued until TSA clears you.
Can I retake the Missouri hazmat test if I fail?
Yes — the retake wait varies by office. Confirm the current retake policy with the Missouri Department of Revenue (licensing); Missouri State Highway Patrol (testing). The endorsement is valid for the term of your CDL (commonly up to 5 years), and renewal requires passing the test and a new TSA assessment again.
Studying in a Different State?
The main CDL Hazmat prep page covers every state.