CDL · Hazardous materials
A trailer that has a heater or cooling unit for its cargo space should never be loaded with which three hazard classes?
Correct answer: Class 1, Division 2.1, and Class 3.
Answer options
- AClass 1, Class 3, and Division 6.1
- BClass 1, Division 2.1, and Class 3 Correct
- CDivision 2.2, Division 4.1, and Class 8
Why
Class 1 explosives, Division 2.1 flammable gases, and Class 3 flammable liquids fall under special cargo heater rules that generally forbid heaters in the cargo space, including combined heater and air conditioner units. Heat can cause these materials to ignite or explode.
About this question
Topic: Hazardous materials License: CDL
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Where it applies: Asked in every state.
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This question is part of Loading and Unloading HazMat (32 questions). Take the full set and check your score.
Practice Loading and Unloading HazMatMore questions from Loading and Unloading HazMat
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- Federal rules say some hazardous materials must stay dry while they are loaded, hauled, and unloaded. Which of these hazard classes includes such materials?
- Your truck's engine powers the pump used to unload a compressed gas. At what point should you shut the engine off?
- On the label of a radioactive package, what does the transport index tell you?
- If you haul Division 1.1 or 1.2 explosives, what may the floor lining of the cargo area be made of?
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