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Hazardous Materials (Hazmat) Practice Question 34

H or XHazardous Materials (Hazmat) · Question 34

The 'HM' column on a shipping paper is used to:

• AMark non-hazardous entries
• BIndicate which line items are hazardous materials with an X or RQ
• CShow driver hours
• DShow route number

Correct answer: B. Indicate which line items are hazardous materials with an X or RQ

Why: An X (or RQ for reportable quantities) in the HM column identifies the hazmat line items so receivers, dispatchers, and inspectors can quickly find them.

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

• Q55. The 'Hazardous Substances' RQ values are listed in:
• Q4. For most hazardous materials, placarding is required when:
• Q17. Class 3 hazardous materials are:
• Q30. When parking a placarded hazmat vehicle, you generally may not park within:
• Q44. You may not transport packages of hazmat with what other items?

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.