How many questions are on the Mississippi CDL knowledge test?

The Mississippi CDL general knowledge test has 50 multiple-choice questions, and you need 80% (40 correct) to pass. Each endorsement test like HazMat is shorter (typically 20-30 questions) but uses the same 80% threshold.

What's the minimum age for a CDL in Mississippi?

In Mississippi, the minimum age for a CDL is 18 (intrastate); 21 (interstate). Federal law requires drivers to be 21+ to drive a CMV across state lines or to transport hazardous materials, regardless of state minimum age.

How much does the HazMat endorsement cost?

The HazMat endorsement fee varies by state, typically $10 to $40 for the CDL endorsement itself. The TSA background check costs approximately $86.50 and must be renewed every 5 years. Some states may charge additional processing fees.

How long does it take to get a HazMat endorsement?

After passing the written test, the TSA background check takes 4 to 6 weeks to complete. You cannot transport hazardous materials until the background check clears and the endorsement is added to your CDL. Plan ahead if you need it for a specific job start date.

Do I need ELDT for the HazMat endorsement?

Yes. Since February 2022, the FMCSA requires Entry-Level Driver Training (ELDT) for anyone obtaining a HazMat endorsement for the first time. You must complete training through an FMCSA-registered training provider before taking the knowledge test. This requirement does not apply to renewals if you already hold the endorsement.

What are the nine DOT hazard classes?

The nine classes are: 1) Explosives, 2) Gases, 3) Flammable Liquids, 4) Flammable Solids, 5) Oxidizers and Organic Peroxides, 6) Toxic and Infectious Substances, 7) Radioactive Materials, 8) Corrosives, and 9) Miscellaneous Dangerous Goods. Each class has specific placarding, handling, and segregation requirements.

Can non-U.S. citizens get a HazMat endorsement?

Lawful permanent residents (green card holders) can obtain a HazMat endorsement. However, individuals on temporary visas, including H-1B and student visas, are generally not eligible. The TSA requires U.S. citizenship or lawful permanent resident status to pass the security threat assessment.

Mississippi CDL HazMat practice test

Updated for 2026 · 36 HazMat questions of 435 across the full MS CDL path · Aligned to the commercial driver manual · Part of the MS CDL path

Start with general knowledge first. We recommend completing it before drilling hazmat questions.

HazMat also requires a TSA background check and fingerprinting, which can take 30-60 days. Apply early.

Go to general knowledge →

Transport hazardous materials. Requires a TSA background check.

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2 tests, each drawing from a different question pool. Take all 2 to cover the full 36 questions.

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15 random questions from the hazmat pool. Try it free.

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36 questions covering the full hazmat bank. Take when you're ready for everything.

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About the Mississippi HazMat test

The HazMat knowledge test typically consists of 30 multiple-choice questions drawn from the Hazardous Materials section of the CDL manual. You need a score of 80% or higher to pass. Questions cover nine hazard classes, placarding requirements, shipping papers, loading and unloading procedures, emergency response, and the Hazardous Materials Table. You should know when placards are required, how to use the Emergency Response Guidebook, and the specific rules for transporting different classes of hazardous materials. In Mississippi, this test is administered by the DPS as part of the standard CDL knowledge exam - review the Mississippi CDL manual section on hazmat for the most accurate state-specific content.