CDL Practice Question #272

Category: Hazmat

When you stop a hazmat-placarded vehicle at the side of the road, you must place reflective triangles:

Within 10 minutes of stopping
Immediately, but never use flares with Division 1.1, 1.2, 1.3 explosives, oxidizers, or flammable cargo
Only if dark
Only if other vehicles are present

Correct. Place warning devices within 10 minutes. Never use flares with explosives, flammable cargo, or oxidizers — use reflective triangles or red lanterns.

Why this question matters

This question is one of 68 in our Hazmat bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.

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Full Hazmat practice test
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