PassEveryTest
中文

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.

  • 商用车辆
  • 美国
  • 90道题
  • 核对于2026年10月10日

快速解答

官方考试共有30道题。 及格线：Varies by state; usually 30 questions, with 24 correct needed (80%)。 主办机构：Your state driver licensing agency, under federal rules set by FMCSA (49 CFR Part 383)。 在这里免费练习90道题，每道题都附有答案和解释。 已于2026年10月10日根据官方资料核对。

练习前先阅读先阅读《CDL Hazmat Endorsement Study Guide》：通俗易懂的笔记、图解和需要牢记的数字。

  1. 第1题，共25题

    When do you need a hazardous materials (H) endorsement?
    显示答案

    答案: C. To drive a vehicle that needs placards

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

  2. 第2题，共25题

    Besides the knowledge test, what else is required to get a hazmat endorsement?
    显示答案

    答案: A. A TSA security threat assessment

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

  3. 第3题，共25题

    What must you do to renew a hazmat endorsement?
    显示答案

    答案: 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. 第4题，共25题

    When must entry-level driver training for a first hazmat endorsement be completed?
    显示答案

    答案: D. Before you take the hazmat knowledge test

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

  5. 第5题，共25题

    May a commercial learner's permit (CLP) holder drive a vehicle carrying placarded hazardous materials?
    显示答案

    答案: D. No

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

  6. 第6题，共25题

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

    答案: A. At least 3 years

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

  7. 第7题，共25题

    How often must hazmat employees, including drivers, get hazmat training?
    显示答案

    答案: B. At least once every three years

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

  8. 第8题，共25题

    Who decides a hazardous material's proper shipping name, hazard class, ID number and packing group?
    显示答案

    答案: A. The shipper

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

  9. 第9题，共25题

    Who packages, marks and labels a hazmat shipment and prepares the shipping papers?
    显示答案

    答案: A. The shipper

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

  10. 第10题，共25题

    What is one of the carrier's jobs with a hazmat shipment?
    显示答案

    答案: C. Refusing bad shipments and reporting incidents

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

  11. 第11题，共25题

    What is one of the driver's jobs with a hazmat shipment?
    显示答案

    答案: 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. 第12题，共25题

    What is hazard Class 1?
    显示答案

    答案: B. Explosives

    Class 1 is explosives, divided into 1.1 through 1.6.

  13. 第13题，共25题

    What does Division 1.1 mean?
    显示答案

    答案: 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. 第14题，共25题

    What is hazard Class 2?
    显示答案

    答案: B. Gases

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

  15. 第15题，共25题

    What is Division 2.3?
    显示答案

    答案: A. Poison gas

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

  16. 第16题，共25题

    What is hazard Class 3?
    显示答案

    答案: B. Flammable liquids

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

  17. 第17题，共25题

    What does Division 4.3 mean?
    显示答案

    答案: C. Dangerous when wet

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

  18. 第18题，共25题

    What is hazard Class 5?
    显示答案

    答案: C. Oxidizers and organic peroxides

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

  19. 第19题，共25题

    What is hazard Class 6?
    显示答案

    答案: D. Poisons and infectious substances

    Class 6 includes 6.1 poisonous materials and 6.2 infectious substances.

  20. 第20题，共25题

    What is hazard Class 7?
    显示答案

    答案: B. Radioactive materials

    Class 7 is radioactive materials.

  21. 第21题，共25题

    What is hazard Class 8?
    显示答案

    答案: B. Corrosive materials

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

  22. 第22题，共25题

    What is hazard Class 9?
    显示答案

    答案: B. Miscellaneous hazardous materials

    Class 9 covers hazards not covered by the other classes.

  23. 第23题，共25题

    How must hazardous materials be shown on a shipping paper that also lists ordinary items?
    显示答案

    答案: 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. 第24题，共25题

    What does "RQ" mean on a shipping paper?
    显示答案

    答案: B. Reportable quantity

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

  25. 第25题，共25题

    What kind of emergency phone number must appear with a hazmat shipment's papers?
    显示答案

    答案: B. One answered 24 hours a day

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

考前须知

  • 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.

常见问题

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.

资料来源

相关测试