Federal Emergency Management Agency (FEMA) Standardized Awareness Practice Test

Which class is associated with explosive materials in DOT's hazardous material classification system?

1. Class 5

2. Class 1

3. Class 3

4. Class 7

The correct answer is: Class 1

The classification of explosive materials in the Department of Transportation's hazardous materials classification system is designated as Class 1. This class specifically encompasses explosives, which include various substances and devices capable of producing a rapid release of gas and heat, often resulting in an explosion. In this classification, explosives are further divided into six divisions based on their hazards and characteristics, ranging from explosives with a very high explosive sensitivity to those that are relatively stable. This system is crucial for ensuring safe handling, transportation, and storage of these materials, which can pose significant risks if not managed properly. The other classes mentioned are designated for different types of materials. Class 5, for example, pertains to oxidizers and organic peroxides, which are materials that can accelerate combustion. Class 3 relates to flammable liquids, while Class 7 is reserved for radioactive materials. Thus, Class 1 is the accurate answer as it directly pertains to explosives.