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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.

  • Tunga fordon
  • USA
  • 90 frågor
  • Kontrollerad 10 oktober 2026

Kort svar

Det officiella provet har 30 frågor. Godkänt: Varies by state; usually 30 questions, with 24 correct needed (80%). Ansvarig: Your state driver licensing agency, under federal rules set by FMCSA (49 CFR Part 383). Öva gratis här med 90 frågor, alla med svar och förklaring. Kontrollerad mot officiella källor den 10 oktober 2026.

Läs innan du övarBörja med CDL Hazmat Endorsement Study Guide: lättlästa anteckningar, illustrationer och siffrorna att komma ihåg.

  1. Fråga 1 av 25

    When do you need a hazardous materials (H) endorsement?
    Visa svar

    Svar: C. To drive a vehicle that needs placards

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

  2. Fråga 2 av 25

    Besides the knowledge test, what else is required to get a hazmat endorsement?
    Visa svar

    Svar: A. A TSA security threat assessment

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

  3. Fråga 3 av 25

    What must you do to renew a hazmat endorsement?
    Visa svar

    Svar: 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. Fråga 4 av 25

    When must entry-level driver training for a first hazmat endorsement be completed?
    Visa svar

    Svar: D. Before you take the hazmat knowledge test

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

  5. Fråga 5 av 25

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

    Svar: D. No

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

  6. Fråga 6 av 25

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

    Svar: A. At least 3 years

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

  7. Fråga 7 av 25

    How often must hazmat employees, including drivers, get hazmat training?
    Visa svar

    Svar: B. At least once every three years

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

  8. Fråga 8 av 25

    Who decides a hazardous material's proper shipping name, hazard class, ID number and packing group?
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    Svar: A. The shipper

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

  9. Fråga 9 av 25

    Who packages, marks and labels a hazmat shipment and prepares the shipping papers?
    Visa svar

    Svar: A. The shipper

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

  10. Fråga 10 av 25

    What is one of the carrier's jobs with a hazmat shipment?
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    Svar: C. Refusing bad shipments and reporting incidents

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

  11. Fråga 11 av 25

    What is one of the driver's jobs with a hazmat shipment?
    Visa svar

    Svar: 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. Fråga 12 av 25

    What is hazard Class 1?
    Visa svar

    Svar: B. Explosives

    Class 1 is explosives, divided into 1.1 through 1.6.

  13. Fråga 13 av 25

    What does Division 1.1 mean?
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    Svar: 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. Fråga 14 av 25

    What is hazard Class 2?
    Visa svar

    Svar: B. Gases

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

  15. Fråga 15 av 25

    What is Division 2.3?
    Visa svar

    Svar: A. Poison gas

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

  16. Fråga 16 av 25

    What is hazard Class 3?
    Visa svar

    Svar: B. Flammable liquids

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

  17. Fråga 17 av 25

    What does Division 4.3 mean?
    Visa svar

    Svar: C. Dangerous when wet

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

  18. Fråga 18 av 25

    What is hazard Class 5?
    Visa svar

    Svar: C. Oxidizers and organic peroxides

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

  19. Fråga 19 av 25

    What is hazard Class 6?
    Visa svar

    Svar: D. Poisons and infectious substances

    Class 6 includes 6.1 poisonous materials and 6.2 infectious substances.

  20. Fråga 20 av 25

    What is hazard Class 7?
    Visa svar

    Svar: B. Radioactive materials

    Class 7 is radioactive materials.

  21. Fråga 21 av 25

    What is hazard Class 8?
    Visa svar

    Svar: B. Corrosive materials

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

  22. Fråga 22 av 25

    What is hazard Class 9?
    Visa svar

    Svar: B. Miscellaneous hazardous materials

    Class 9 covers hazards not covered by the other classes.

  23. Fråga 23 av 25

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

    Svar: 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. Fråga 24 av 25

    What does "RQ" mean on a shipping paper?
    Visa svar

    Svar: B. Reportable quantity

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

  25. Fråga 25 av 25

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

    Svar: B. One answered 24 hours a day

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

Bra att veta före provet

  • 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.

Vanliga frågor

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.

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