🔍 Key Concepts

• Halon extinguisher hazards on personnel and in confined spaces • Differences between Class B, C, and location restrictions for extinguishers • Special rules for MODUs (Mobile Offshore Drilling Units) and fixed-gas systems

💭 Think About

• Which of the choices talks about where the extinguisher is used rather than what class of fire it fights? • Why might a Halon discharge be more dangerous in a confined, occupied space than in the open or unoccupied area? • On a MODU, what is the main safety concern regarding Halon: the fire class, or the exposure of people to the agent?

✅ Before You Answer

• Verify whether the limitation in the regs is about fire class or about location/occupancy of the space. • Consider that Halon is effective on multiple classes of fires; what is the regulatory restriction really trying to prevent? • Check MODU fire protection rules for any mention of occupied vs. unoccupied spaces when using portable Halon units.