Blaze Through the 2026 CPS Firefighter Exam – Ignite Your Career!

Class I locations are defined as areas where flammable gases or vapors may be present in the air under normal operating conditions. This classification typically includes environments where the potential for ignition exists due to the presence of flammable substances. Flammable vapors and gases can accumulate in these locations, creating a risk of explosion or fire if an ignition source is present.

In contrast, Class II locations are primarily associated with airborne dust, while Class III locations refer to areas where combustible fibers are present. Flammable liquids, while hazardous, are more closely related to Class I locations in terms of their vapors and gas emissions. Therefore, option C is correct as it accurately describes the primary element associated with Class I locations. Understanding these classifications helps in ensuring safety and adherence to regulations in environments where hazardous materials are handled.