CDL Practice Question #259
Category: Hazmat
Electrical equipment in cargo areas of vehicles transporting Class 3 (flammable) liquids must be:
Correct. Wiring and electrical fittings in flammable-liquid loading areas must be designed to prevent ignition — spark-free, sealed, or explosion-proof.
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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