Practice question

The use of cargo heaters is prohibited when transporting:

  1. Class 1 (Explosives), Class 3 (Flammable Liquids), or Division 2.1 (Flammable Gases)
  2. Class 8 (Corrosives) only
  3. Any hazardous material in a tanker
  4. Any material above 1,001 pounds

Answer: A — Class 1 (Explosives), Class 3 (Flammable Liquids), or Division 2.1 (Flammable Gases)

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

Practice more: CDL HazMat Endorsement Practice Questions - Commercial Driver's License Hazardous Materials (H) Endorsement Exam →