CDL · Hazardous materials

Which three hazard classes are generally kept out of any cargo compartment that has a heater or a heater/air conditioner unit?

Correct answer: Classes 1, 2.1, and 3.

Answer options

  1. AClasses 2.2, 8, and 9
  2. BClasses 1, 2.1, and 3 Correct
  3. CClasses 6, 7, and 8

Why

A heater in the cargo area can ignite Class 1 explosives, Division 2.1 flammable gases, and Class 3 flammable liquids. For that reason the regulations usually forbid heaters in the compartment holding such loads, even automatic units that provide both heating and air conditioning. Don't load them in that kind of space unless you are aware of all the related rules.

About this question

Topic: Hazardous materials   License: CDL

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