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CDL · The Intent of the Regulations

Which of the following is NOT one of the hazard class numbers under DOT regulations?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

Class 11 — Bulk pharmaceuticals

  1. A Class 6 — Poisons and infectious substances
  2. B Class 9 — Miscellaneous hazardous materials
  3. C Class 1 — Explosives
  4. D Class 11 — Bulk pharmaceuticals

Why this is the answer

DOT hazard classes are numbered 1 through 9, with no Class 11. The full list: Class 1 — Explosives; Class 2 — Gases (2.1 flammable gas, 2.2 non-flammable non-toxic gas, 2.3 toxic gas); Class 3 — Flammable liquids; Class 4 — Flammable solids and self-reactive substances; Class 5 — Oxidizers and organic peroxides; Class 6 — Toxic substances (6.1) and infectious substances (6.2); Class 7 — Radioactive materials; Class 8 — Corrosive substances; Class 9 — Miscellaneous hazardous materials (anything dangerous that does not fit Classes 1-8, such as lithium batteries and elevated-temperature materials). Within most classes, divisions (2.1, 2.2, 6.1, etc.) further specify the type of hazard.
Source: FMCSA CDL Manual 9.1.3 Hazard Classes

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About this topic: The Intent of the Regulations

The hazardous materials regulations exist to contain the product, communicate the risk and ensure safe drivers and equipment. Questions on the intent of the rules ask who is responsible for what — shipper, carrier, driver — and why each requirement exists. This is one of 7 Hazardous Materials questions on the intent of the regulations, each with a full explanation on a single study page.

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