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CDL · General

What information can be found on a hazmat placard?

Correct answer

The hazard class (by color and symbol), often a 4-digit identification number for the material, and sometimes the hazard class number

  1. A The driver's name
  2. B The hazard class (by color and symbol), often a 4-digit identification number for the material, and sometimes the hazard class number
  3. C The truck's mileage
  4. D The delivery time

Why this is the answer

A HAZMAT PLACARD displays: the HAZARD CLASS indicated by COLOR and SYMBOL (e.g., orange = explosives, red = flammable, green = non-flammable gas, yellow = oxidizer, white = poison/inhalation hazard, etc.); the HAZARD CLASS NUMBER (1-9) usually at the bottom; and often a 4-digit UN/NA IDENTIFICATION NUMBER identifying the specific material. CDL hazmat. This lets emergency responders quickly identify the hazard and look it up (e.g., in the ERG) to respond safely. The diamond shape and standardized colors/symbols are recognized internationally. Knowing what information a placard conveys (hazard class via color/symbol/number, ID number) is core hazmat knowledge.
Source: FMCSA CDL Manual — Hazmat, Placard Information

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When are hazardous materials placards required on a vehicle?

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