Associate Safety Professional Practice Exam

What is a characteristic of a Class II hazardous area classification?

1. Presence of toxic gases

2. Presence of combustible dusts

3. Presence of flammable liquids

4. Presence of corrosive materials

The correct answer is: Presence of combustible dusts

A Class II hazardous area classification specifically pertains to environments where combustible dusts are present. This classification recognizes that certain dusts can ignite and cause explosions or fires under specific conditions, such as when they are suspended in the air and exposed to an ignition source. The focus on combustible dusts highlights the need for specific safety measures and equipment designed to mitigate the risks associated with these materials. The other options refer to different classes of hazardous materials that do not fall under Class II. For example, the presence of toxic gases is typically associated with Class I hazardous environments, which involve flammable gases or vapors. Flammable liquids, also categorized under Class I, present a different set of risks compared to combustible dust. Corrosive materials are not classified under the hazardous area classifications that address ignitability but focus rather on their chemical reactivity and potential to cause harm through corrosion. This emphasizes the specificity of the Class II classification to combustible dust and its related hazards.