How many questions are on the Alabama CDL knowledge test?

The Alabama CDL general knowledge test has 50 multiple-choice questions, and you need 80% (40 correct) to pass. The HazMat test is shorter. Most states do not publish its question count, but the 80% pass mark is federal under 49 CFR 383.135 and applies to every CDL knowledge test.

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

In Alabama, 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.

Why does HazMat take longer to get than other endorsements?

Because the written test is only half of it. Federal law also requires a TSA Security Threat Assessment, meaning fingerprinting and a background check, which commonly takes 30 to 60 days and is booked separately from the knowledge test. Apply for it early rather than after you pass, or the endorsement waits on the background check rather than on you.

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.

Alabama CDL HazMat practice test

Updated for 2026 · 50 HazMat questions of 471 across the full AL CDL path · Aligned to the commercial driver manual · Part of the AL 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.

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Authorizes hazardous materials in placarded amounts, and adds a TSA security threat assessment on top of the written test. Covers placarding, segregation rules and emergency response.

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2 tests, each drawing from a different question pool. Take all 2 to cover the full 50 questions.

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

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

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About the Alabama HazMat test

A separate written exam from General Knowledge, required in every state under 49 CFR 383.71. The pass mark is 80%, fixed federally by 49 CFR 383.135; most states do not publish how many questions it carries. 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. This is a separate knowledge test from General Knowledge, required in every state under 49 CFR 383.71, and the ALEA publishes the Alabama Commercial Driver License Manual as the study source for it.