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Communication Rules — CDL Hazardous Materials Practice Test

Communication RulesQuestion 1 of 30

53 questions in this topic · 30 drawn at random this round

What does Column 8 show, and what is true of Columns 9 and 10 for highway transport?

CDL Manual — Hazardous Materials (§9)

Questions are based on Section 9 (Hazardous Materials) of the official CDL manual (AAMVA model). 🔴 The HazMat (H) endorsement knowledge test is given in ENGLISH ONLY in every state — it is security-sensitive and, unlike the General Knowledge test, is not offered in other languages anywhere (federal rules bar interpreters). Our Chinese & Spanish are study aids to help you learn the English material. The H endorsement also requires a TSA Security Threat Assessment (fingerprint background check) in addition to passing this test.

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This CDL Hazardous Materials Communication Rules practice set has 53 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real CDL Hazardous Materials knowledge test to pass.

Sample questions

Three questions from the Communication Rules bank with the correct answer and an explanation. The practice quiz above draws 30 questions at random from the same bank.

  1. What does a material's hazard class tell you, and how many hazard classes are there?

    • Its risks — and there are nine hazard classes — Correct answer
    • Its price — and there are three hazard classes
    • Its weight — and there are five hazard classes
    • Its color — and there are twelve hazard classes

    Explanation: A material's hazard class reflects the risks associated with it. There are nine different hazard classes (Class 1 Explosives through Class 9 Miscellaneous). English term: hazard class（危险类别 / clase de peligro）.

    Handbook: Communication Rules — Definitions

  2. Which of the following is a shipping paper?

    • A bill of lading or a manifest — Correct answer
    • The driver's medical card
    • The vehicle's registration
    • The fuel receipt

    Explanation: A shipping paper describes the hazardous materials being transported. Shipping orders, bills of lading, and manifests are all shipping papers. English term: shipping paper（运单 / documento de embarque）.

    Handbook: Communication Rules — Definitions

  3. Why do the rules require hazardous materials shipping papers to be kept where they can be found quickly?

    • Responders may need them if you are injured and cannot communicate the hazards — Correct answer
    • So the shipper can bill the customer faster
    • So you can read them while driving
    • Because the law requires them to be laminated

    Explanation: After a crash or spill you may be injured and unable to communicate the hazards. Firefighters and police can reduce damage and injury if they know what is being carried, so your life — and others' — may depend on quickly locating the shipping papers. English term: shipping paper（运单 / documento de embarque）.

    Handbook: Communication Rules — Definitions