🔍 Key Concepts

• Fixed CO2 fire-extinguishing systems and their dedicated piping • Regulatory intent to prevent unintended CO2 discharge into spaces or systems not designed for it • What systems are normally allowed to be interconnected or triggered by CO2 systems on ships

💭 Think About

• Which of these four choices would be unsafe or illogical to share hard piping with a CO2 system? Think about what CO2 does in a space. • Ask yourself: is CO2 ever intended to be used as part of water distribution, normal ventilation, or electrical runs? Or is it more commonly linked to something that activates or controls the system? • Which option describes a system that would naturally be associated with detecting or activating a fire response, instead of moving other substances or equipment?

✅ Before You Answer

• Eliminate any option where CO2 piping would need to carry water, air for ventilation, or electrical components—CO2 piping is pressure-rated gas piping, not a conduit or duct. • Recall that fixed CO2 systems are usually associated with discharge nozzles, control valves, and detection/actuation arrangements, not general ship services. • Think about SOLAS and 46 CFR intent: CO2 systems and their piping must remain dedicated to fire-extinguishing functions to avoid confusion and accidental exposure. Which option best fits that intent?