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CDL Hazmat Endorsement Practice Test 2026

The hazardous materials (H) endorsement is needed to drive any vehicle that must display placards. These questions cover the hazard classes, shipping papers, placarding, loading, driving and parking rules, and what to do in an emergency.

  • Bedrijfsvoertuig
  • Verenigde Staten
  • 90 vragen
  • Gecontroleerd op 10 oktober 2026

Kort antwoord

Het officiële examen heeft 30 vragen. Geslaagd: Varies by state; usually 30 questions, with 24 correct needed (80%). Afgenomen door: Your state driver licensing agency, under federal rules set by FMCSA (49 CFR Part 383). Oefen hier gratis met 90 vragen, elk met het antwoord en een uitleg. Gecontroleerd aan de hand van officiële bronnen op 10 oktober 2026.

Lees dit voordat je gaat oefenenBegin met de CDL Hazmat Endorsement Study Guide: notities in begrijpelijke taal, schema’s en de getallen die je moet onthouden.

  1. Vraag 1 van 25

    When do you need a hazardous materials (H) endorsement?
    Toon antwoord

    Antwoord: C. To drive a vehicle that needs placards

    A hazmat endorsement is required to drive a vehicle that needs placards.

  2. Vraag 2 van 25

    Besides the knowledge test, what else is required to get a hazmat endorsement?
    Toon antwoord

    Antwoord: A. A TSA security threat assessment

    Original and renewal hazmat endorsements require a TSA security threat assessment, which includes fingerprints.

  3. Vraag 3 van 25

    What must you do to renew a hazmat endorsement?
    Toon antwoord

    Antwoord: C. Retake the hazmat test and pass a new TSA check

    Drivers retake the hazmat knowledge test when they renew the endorsement, and the TSA check is also required at renewal.

  4. Vraag 4 van 25

    When must entry-level driver training for a first hazmat endorsement be completed?
    Toon antwoord

    Antwoord: D. Before you take the hazmat knowledge test

    For a first H endorsement, ELDT must be completed before the hazmat knowledge test.

  5. Vraag 5 van 25

    May a commercial learner's permit (CLP) holder drive a vehicle carrying placarded hazardous materials?
    Toon antwoord

    Antwoord: D. No

    A CLP holder may not drive a CMV transporting hazardous materials.

  6. Vraag 6 van 25

    You are convicted of DUI for the first time while driving a placarded hazmat load. How long will you be disqualified?
    Toon antwoord

    Antwoord: A. At least 3 years

    Major offenses committed while transporting hazardous materials bring a 3-year disqualification for a first conviction.

  7. Vraag 7 van 25

    How often must hazmat employees, including drivers, get hazmat training?
    Toon antwoord

    Antwoord: B. At least once every three years

    Hazmat training must be repeated at least once every three years.

  8. Vraag 8 van 25

    Who decides a hazardous material's proper shipping name, hazard class, ID number and packing group?
    Toon antwoord

    Antwoord: A. The shipper

    The shipper identifies the material and decides the shipping name, hazard class, ID number, packing group, labels and placards.

  9. Vraag 9 van 25

    Who packages, marks and labels a hazmat shipment and prepares the shipping papers?
    Toon antwoord

    Antwoord: A. The shipper

    The shipper packages, marks and labels the materials, prepares the shipping papers and supplies placards.

  10. Vraag 10 van 25

    What is one of the carrier's jobs with a hazmat shipment?
    Toon antwoord

    Antwoord: C. Refusing bad shipments and reporting incidents

    The carrier checks the shipper's work, refuses improper shipments and reports accidents and incidents.

  11. Vraag 11 van 25

    What is one of the driver's jobs with a hazmat shipment?
    Toon antwoord

    Antwoord: C. Refusing leaking packages and placarding the vehicle

    The driver checks labels and markings, refuses leaking or bad shipments, places placards, and keeps the shipping papers in order.

  12. Vraag 12 van 25

    What is hazard Class 1?
    Toon antwoord

    Antwoord: B. Explosives

    Class 1 is explosives, divided into 1.1 through 1.6.

  13. Vraag 13 van 25

    What does Division 1.1 mean?
    Toon antwoord

    Antwoord: D. Explosives with a mass explosion hazard

    Division 1.1 explosives can explode all at once (mass explosion). Division 1.4 has only a minor explosion hazard.

  14. Vraag 14 van 25

    What is hazard Class 2?
    Toon antwoord

    Antwoord: B. Gases

    Class 2 is gases: 2.1 flammable, 2.2 nonflammable, and 2.3 poison gas.

  15. Vraag 15 van 25

    What is Division 2.3?
    Toon antwoord

    Antwoord: A. Poison gas

    Division 2.3 is poison gas, one of the most dangerous materials.

  16. Vraag 16 van 25

    What is hazard Class 3?
    Toon antwoord

    Antwoord: B. Flammable liquids

    Class 3 is flammable liquids, such as gasoline and many paints.

  17. Vraag 17 van 25

    What does Division 4.3 mean?
    Toon antwoord

    Antwoord: C. Dangerous when wet

    Division 4.3 materials are dangerous when wet. 4.1 is flammable solid and 4.2 is spontaneously combustible.

  18. Vraag 18 van 25

    What is hazard Class 5?
    Toon antwoord

    Antwoord: C. Oxidizers and organic peroxides

    Class 5 is oxidizers (5.1) and organic peroxides (5.2).

  19. Vraag 19 van 25

    What is hazard Class 6?
    Toon antwoord

    Antwoord: D. Poisons and infectious substances

    Class 6 includes 6.1 poisonous materials and 6.2 infectious substances.

  20. Vraag 20 van 25

    What is hazard Class 7?
    Toon antwoord

    Antwoord: B. Radioactive materials

    Class 7 is radioactive materials.

  21. Vraag 21 van 25

    What is hazard Class 8?
    Toon antwoord

    Antwoord: B. Corrosive materials

    Class 8 is corrosives, which can destroy skin or eat through metal.

  22. Vraag 22 van 25

    What is hazard Class 9?
    Toon antwoord

    Antwoord: B. Miscellaneous hazardous materials

    Class 9 covers hazards not covered by the other classes.

  23. Vraag 23 van 25

    How must hazardous materials be shown on a shipping paper that also lists ordinary items?
    Toon antwoord

    Antwoord: C. Listed first, highlighted, or marked with an X in the HM column

    Hazmat entries must stand out: list them first, highlight them, or put an X in the HM column.

  24. Vraag 24 van 25

    What does "RQ" mean on a shipping paper?
    Toon antwoord

    Antwoord: B. Reportable quantity

    RQ means reportable quantity. A spill of that amount or more must be reported.

  25. Vraag 25 van 25

    What kind of emergency phone number must appear with a hazmat shipment's papers?
    Toon antwoord

    Antwoord: B. One answered 24 hours a day

    Shipping papers must give a 24-hour emergency response phone number.

Wat je moet weten voor het examen

  • Federal rules set the passing score for every CDL knowledge test: you must answer at least 80% of the questions correctly.
  • The hazmat test has 30 questions in states such as Washington and Illinois, so you need 24 correct answers.
  • You need a TSA security threat assessment, with fingerprints, for the original hazmat endorsement and at each renewal.
  • For a first hazmat endorsement, you must finish entry-level driver training before you take the hazmat knowledge test.
  • You must pass the hazmat knowledge test again when you renew the endorsement.
  • A CLP holder may not drive a vehicle carrying hazardous materials, and a first DUI while hauling placarded hazmat brings a 3-year disqualification.

Veelgestelde vragen

How many questions are on the CDL hazmat test?

Each state sets the number, but Washington and Illinois both use 30 questions. You need 80%, or 24 correct.

What else do I need besides the test?

You need a TSA security threat assessment (a background check with fingerprints) and, for a first endorsement, entry-level driver training before the knowledge test.

When are placards required?

Table 1 materials, such as Division 1.1 explosives and poison gas, need placards in any amount. Table 2 materials in non-bulk packages need placards at 1,001 pounds or more in total.

Where do I keep hazmat shipping papers?

While driving, keep them within reach with your seat belt on or in the pouch on the driver's door. When you leave the cab, put them on the driver's seat or in the door pouch.

Do I have to retake the hazmat test to renew?

Yes. Drivers take the hazmat knowledge test again at renewal, and the TSA background check is repeated.

Bronnen

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