Practice question

Which statement is correct about hazardous materials in tank vehicles require proper h or x authority when hazmat rules apply?

  1. Passenger authority is the same as tanker authority.
  2. Washington does not use a CDL knowledge test for tank vehicles.
  3. N-only authority automatically includes all HazMat authority.
  4. Hazardous materials in tank vehicles require proper H or X authority when HazMat rules apply.

Answer: D — Hazardous materials in tank vehicles require proper H or X authority when HazMat rules apply.

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