Practice question

Which is TRUE about UN identification numbers on placards?

  1. They are random and have no lookup meaning
  2. They are four-digit numbers that cross-reference to specific materials in the DOT ERG yellow and blue pages
  3. They are five-digit national codes
  4. They are required only for petroleum products

Answer: B — They are four-digit numbers that cross-reference to specific materials in the DOT ERG yellow and blue pages

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Hazmat Operations Practice Questions - NFPA 470 Hazardous Materials Operations Exam →