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Hazardous Materials (Hazmat) Practice Question 55

H or XHazardous Materials (Hazmat) · Question 55

The 'Hazardous Substances' RQ values are listed in:

• A49 CFR 172.101 Appendix A
• B29 CFR 1910
• CEPA Title 40 only
• DFMCSA driver manual

Correct answer: A. 49 CFR 172.101 Appendix A

Why: Appendix A to 172.101 lists hazardous substances and their reportable quantities. RQ packages must be marked accordingly.

How this question fits the Hazmat test

Mishandled hazmat causes catastrophic public consequences. The endorsement is restricted, requires fingerprint background screening through the TSA, and demands deeper familiarity with regulatory paperwork than any other CDL endorsement.

Study technique for this topic

Master the Hazardous Materials Table columns, know the placarding thresholds, and learn which classes can never be loaded together. Practice locating UN/NA identification numbers and understanding the segregation chart.

Related Hazmat practice questions

• Q12. A hazmat driver must hold a:
• Q25. Smoking is prohibited within how many feet of a placarded vehicle (with certain exceptions…
• Q38. The 'security awareness' training for hazmat covers:
• Q51. Marking refers to:
• Q1. The Hazardous Materials Regulations are found in:

Continue your CDL preparation

The Hazardous Materials (Hazmat) portion of the CDL knowledge exam covers more than this single question. Use this site's full Hazardous Materials (Hazmat) bank to drill every topic, then test yourself with one of our state-specific practice sets to confirm you are ready for the actual DMV exam in your state. Always check your state's CDL handbook for any local addenda before the test day.

If you are still building your overall CDL foundation, start with the General Knowledge bank — every CDL applicant must pass it — and then work outward to the endorsements you plan to add.