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Hazardous Materials (Hazmat) Practice Question 10

H or XHazardous Materials (Hazmat) · Question 10

A 'segregation' rule means:

• AYou may load any hazmat together
• BCertain hazardous materials may not be loaded or stored near each other
• CDrivers must be separate
• DTrailers must have dividers

Correct answer: B. Certain hazardous materials may not be loaded or stored near each other

Why: 172.101 Segregation Table forbids certain combinations of hazard classes from being transported together because of reactivity, fire, or contamination risk.

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

• Q3. A 'placard' on a hazmat vehicle is:
• Q17. Class 3 hazardous materials are:
• Q30. When parking a placarded hazmat vehicle, you generally may not park within:
• Q43. Loading hazmat into a vehicle requires:
• Q56. When loading explosives, the cargo space must be:

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.