🔍 Key Concepts

• Class A and B fires in paint lockers and why paint lockers are treated as high-risk spaces • Purpose and operation of fixed CO2 flooding systems in enclosed spaces • Dangers of opening doors or ventilating a suspected fire in a confined compartment

💭 Think About

• Before anyone goes near the door, what happens to the fire if you add more air to an enclosed space already showing heavy smoke? • In a designated paint locker with a fixed CO2 system, is the priority to investigate inside first, or to control the atmosphere and boundary the space? • Which choice best prevents smoke and flames from spreading beyond the paint locker in the first critical seconds?

✅ Before You Answer

• Verify which action avoids feeding the fire with oxygen in the early stage • Check which option reflects using the space’s designed fire protection system and containment, rather than exposing crew to immediate danger • Confirm which step should be done before any door is opened or crew enter the compartment