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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.

  • Komersyal na sasakyan
  • Estados Unidos
  • 90 tanong
  • Sinuri noong Oktubre 10, 2026

Mabilis na sagot

Ang opisyal na pagsusulit ay may 30 tanong. Passing mark: Varies by state; usually 30 questions, with 24 correct needed (80%). Pinapatakbo ito ng Your state driver licensing agency, under federal rules set by FMCSA (49 CFR Part 383). Magsanay dito nang libre gamit ang 90 tanong, bawat isa ay may sagot at paliwanag. Sinuri laban sa mga opisyal na sanggunian noong Oktubre 10, 2026.

Basahin bago magsanayMagsimula sa CDL Hazmat Endorsement Study Guide: mga tala sa simpleng wika, mga diagram at mga numerong dapat tandaan.

  1. Tanong 1 ng 25

    When do you need a hazardous materials (H) endorsement?
    Ipakita ang sagot

    Sagot: C. To drive a vehicle that needs placards

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

  2. Tanong 2 ng 25

    Besides the knowledge test, what else is required to get a hazmat endorsement?
    Ipakita ang sagot

    Sagot: A. A TSA security threat assessment

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

  3. Tanong 3 ng 25

    What must you do to renew a hazmat endorsement?
    Ipakita ang sagot

    Sagot: 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. Tanong 4 ng 25

    When must entry-level driver training for a first hazmat endorsement be completed?
    Ipakita ang sagot

    Sagot: D. Before you take the hazmat knowledge test

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

  5. Tanong 5 ng 25

    May a commercial learner's permit (CLP) holder drive a vehicle carrying placarded hazardous materials?
    Ipakita ang sagot

    Sagot: D. No

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

  6. Tanong 6 ng 25

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

    Sagot: A. At least 3 years

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

  7. Tanong 7 ng 25

    How often must hazmat employees, including drivers, get hazmat training?
    Ipakita ang sagot

    Sagot: B. At least once every three years

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

  8. Tanong 8 ng 25

    Who decides a hazardous material's proper shipping name, hazard class, ID number and packing group?
    Ipakita ang sagot

    Sagot: A. The shipper

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

  9. Tanong 9 ng 25

    Who packages, marks and labels a hazmat shipment and prepares the shipping papers?
    Ipakita ang sagot

    Sagot: A. The shipper

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

  10. Tanong 10 ng 25

    What is one of the carrier's jobs with a hazmat shipment?
    Ipakita ang sagot

    Sagot: C. Refusing bad shipments and reporting incidents

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

  11. Tanong 11 ng 25

    What is one of the driver's jobs with a hazmat shipment?
    Ipakita ang sagot

    Sagot: 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. Tanong 12 ng 25

    What is hazard Class 1?
    Ipakita ang sagot

    Sagot: B. Explosives

    Class 1 is explosives, divided into 1.1 through 1.6.

  13. Tanong 13 ng 25

    What does Division 1.1 mean?
    Ipakita ang sagot

    Sagot: 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. Tanong 14 ng 25

    What is hazard Class 2?
    Ipakita ang sagot

    Sagot: B. Gases

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

  15. Tanong 15 ng 25

    What is Division 2.3?
    Ipakita ang sagot

    Sagot: A. Poison gas

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

  16. Tanong 16 ng 25

    What is hazard Class 3?
    Ipakita ang sagot

    Sagot: B. Flammable liquids

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

  17. Tanong 17 ng 25

    What does Division 4.3 mean?
    Ipakita ang sagot

    Sagot: C. Dangerous when wet

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

  18. Tanong 18 ng 25

    What is hazard Class 5?
    Ipakita ang sagot

    Sagot: C. Oxidizers and organic peroxides

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

  19. Tanong 19 ng 25

    What is hazard Class 6?
    Ipakita ang sagot

    Sagot: D. Poisons and infectious substances

    Class 6 includes 6.1 poisonous materials and 6.2 infectious substances.

  20. Tanong 20 ng 25

    What is hazard Class 7?
    Ipakita ang sagot

    Sagot: B. Radioactive materials

    Class 7 is radioactive materials.

  21. Tanong 21 ng 25

    What is hazard Class 8?
    Ipakita ang sagot

    Sagot: B. Corrosive materials

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

  22. Tanong 22 ng 25

    What is hazard Class 9?
    Ipakita ang sagot

    Sagot: B. Miscellaneous hazardous materials

    Class 9 covers hazards not covered by the other classes.

  23. Tanong 23 ng 25

    How must hazardous materials be shown on a shipping paper that also lists ordinary items?
    Ipakita ang sagot

    Sagot: 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. Tanong 24 ng 25

    What does "RQ" mean on a shipping paper?
    Ipakita ang sagot

    Sagot: B. Reportable quantity

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

  25. Tanong 25 ng 25

    What kind of emergency phone number must appear with a hazmat shipment's papers?
    Ipakita ang sagot

    Sagot: B. One answered 24 hours a day

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

Ang dapat malaman bago ang pagsusulit

  • 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.

Mga madalas itanong

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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