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How many hazard classes does the hazardous materials system use to group materials by their main danger?
- A.Three classes total
- B.Twenty classes
- C.One class for all chemicals
- D.Nine classes, plus divisions within some classes for more specific hazards
Correct answer
D. Nine classes, plus divisions within some classes for more specific hazards
Why
The system groups materials into nine classes, such as explosives, gases, flammable liquids, and toxic substances, with divisions that refine the danger. The class and division on the papers and labels drive the handling, placarding, and segregation rules.
Manual topic: HazMat - Classes · From the General Knowledge practice bank (GK-331).