Practice question

What does the letter 'X' preceding a Hazard Identification Number (HIN) on an orange plate indicate (e.g. X333 or X80)?

  1. The substance reacts dangerously with water
  2. The substance is an explosive of Class 1
  3. The vehicle is prohibited from driving through tunnels
  4. The substance is transported at elevated temperatures

Answer: A — The substance reacts dangerously with water

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