Cooperative Personnel Services Firefighter (CPS) Practice Exam 2026 – The All-in-One Guide to Master Your Firefighter Exam Success!

Locations with flammable gases or vapors are classified as Class I. This classification is based on the potential hazards associated with the presence of flammable substances in the atmosphere. In Class I locations, the gases or vapors are typically present in sufficient quantities to create a risk of explosion or fire when mixed with air. This classification includes areas where flammable gases may be in the air under normal operating conditions, making them potentially hazardous environments.

Class I locations are commonly found in areas such as gas stations, process plants, and storage facilities, where flammable liquids are handled and stored. The understanding of this classification is essential for safety professionals and firefighters, as it guides necessary precautions and safety measures to reduce the risk of fires or explosions in these environments. Recognizing such classifications is critical for effective fire prevention and mitigation strategies.