Practice question

Why can an empty cargo tank that contained hazardous material still require hazmat precautions?

  1. Residue can remain hazardous until the tank is cleaned and purged as required
  2. Empty tanks always become Class 9
  3. The endorsement is never needed for empty tanks
  4. Placards are forbidden on empty tanks

Answer: A — Residue can remain hazardous until the tank is cleaned and purged as required

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