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When is a vehicle generally required to be placarded?
- A.When it carries amounts and types of hazardous materials that meet the placarding thresholds in the rules, and for some materials, such as certain explosives and bulk loads, at any quantity
- B.Only when the driver chooses to
- C.Never for shipments under 10,000 pounds in all cases
- D.Only on interstate highways
Correct answer
A. When it carries amounts and types of hazardous materials that meet the placarding thresholds in the rules, and for some materials, such as certain explosives and bulk loads, at any quantity
Why
Most placarding duties depend on the class, division, and aggregate weight of the load, while the most dangerous materials trigger placarding at any amount. The shipping papers and the hazmat table, not guesswork, decide which placards a load requires.
Manual topic: HazMat - Placarding Thresholds · From the General Knowledge practice bank (GK-338).