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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.

  • المركبات التجارية
  • الولايات المتحدة
  • عدد الأسئلة: 90
  • تمت المراجعة في 10 أكتوبر 2026

إجابة سريعة

عدد أسئلة الاختبار الرسمي: 30. درجة النجاح: Varies by state; usually 30 questions, with 24 correct needed (80%). الجهة المنظِّمة: Your state driver licensing agency, under federal rules set by FMCSA (49 CFR Part 383). تدرّب هنا مجانًا على 90 من الأسئلة، مع الإجابة والشرح لكل سؤال. تمت مراجعته مقارنةً بالمصادر الرسمية في 10 أكتوبر 2026.

اقرأ قبل أن تتدرّبابدأ بقراءة «CDL Hazmat Endorsement Study Guide»: ملاحظات بلغة بسيطة ورسوم توضيحية والأرقام التي يجب تذكّرها.

  1. السؤال 1 من 25

    When do you need a hazardous materials (H) endorsement?
    أظهر الإجابة

    الإجابة: C. To drive a vehicle that needs placards

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

  2. السؤال 2 من 25

    Besides the knowledge test, what else is required to get a hazmat endorsement?
    أظهر الإجابة

    الإجابة: A. A TSA security threat assessment

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

  3. السؤال 3 من 25

    What must you do to renew a hazmat endorsement?
    أظهر الإجابة

    الإجابة: 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. السؤال 4 من 25

    When must entry-level driver training for a first hazmat endorsement be completed?
    أظهر الإجابة

    الإجابة: D. Before you take the hazmat knowledge test

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

  5. السؤال 5 من 25

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

    الإجابة: D. No

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

  6. السؤال 6 من 25

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

    الإجابة: A. At least 3 years

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

  7. السؤال 7 من 25

    How often must hazmat employees, including drivers, get hazmat training?
    أظهر الإجابة

    الإجابة: B. At least once every three years

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

  8. السؤال 8 من 25

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

    الإجابة: A. The shipper

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

  9. السؤال 9 من 25

    Who packages, marks and labels a hazmat shipment and prepares the shipping papers?
    أظهر الإجابة

    الإجابة: A. The shipper

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

  10. السؤال 10 من 25

    What is one of the carrier's jobs with a hazmat shipment?
    أظهر الإجابة

    الإجابة: C. Refusing bad shipments and reporting incidents

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

  11. السؤال 11 من 25

    What is one of the driver's jobs with a hazmat shipment?
    أظهر الإجابة

    الإجابة: 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. السؤال 12 من 25

    What is hazard Class 1?
    أظهر الإجابة

    الإجابة: B. Explosives

    Class 1 is explosives, divided into 1.1 through 1.6.

  13. السؤال 13 من 25

    What does Division 1.1 mean?
    أظهر الإجابة

    الإجابة: 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. السؤال 14 من 25

    What is hazard Class 2?
    أظهر الإجابة

    الإجابة: B. Gases

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

  15. السؤال 15 من 25

    What is Division 2.3?
    أظهر الإجابة

    الإجابة: A. Poison gas

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

  16. السؤال 16 من 25

    What is hazard Class 3?
    أظهر الإجابة

    الإجابة: B. Flammable liquids

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

  17. السؤال 17 من 25

    What does Division 4.3 mean?
    أظهر الإجابة

    الإجابة: C. Dangerous when wet

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

  18. السؤال 18 من 25

    What is hazard Class 5?
    أظهر الإجابة

    الإجابة: C. Oxidizers and organic peroxides

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

  19. السؤال 19 من 25

    What is hazard Class 6?
    أظهر الإجابة

    الإجابة: D. Poisons and infectious substances

    Class 6 includes 6.1 poisonous materials and 6.2 infectious substances.

  20. السؤال 20 من 25

    What is hazard Class 7?
    أظهر الإجابة

    الإجابة: B. Radioactive materials

    Class 7 is radioactive materials.

  21. السؤال 21 من 25

    What is hazard Class 8?
    أظهر الإجابة

    الإجابة: B. Corrosive materials

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

  22. السؤال 22 من 25

    What is hazard Class 9?
    أظهر الإجابة

    الإجابة: B. Miscellaneous hazardous materials

    Class 9 covers hazards not covered by the other classes.

  23. السؤال 23 من 25

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

    الإجابة: 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. السؤال 24 من 25

    What does "RQ" mean on a shipping paper?
    أظهر الإجابة

    الإجابة: B. Reportable quantity

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

  25. السؤال 25 من 25

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

    الإجابة: B. One answered 24 hours a day

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

ما يجب معرفته قبل الاختبار

  • 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.

الأسئلة الشائعة

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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