🔍 Key Concepts

• Fixed CO₂ flooding systems on ships are designed to release a measured, total charge into a space, not a variable amount based on conditions during the fire. • The design concentration and volume of the protected space are used to calculate how much CO₂ is required to smother a fire in that space. • The distribution piping and nozzles are arranged to deliver a pre‑calculated quantity of CO₂ into each specific compartment.

💭 Think About

• Ask yourself: in a low‑pressure CO₂ system, is the amount of CO₂ released something that changes during the fire, or is it determined during the system’s design and installation? • Consider whether the system would practically be able to ‘sense’ when a compartment is safe again, or whether it simply discharges a fixed amount intended to reach a design concentration. • Think about what the nozzles actually do: do they meter total system quantity, or do they just distribute whatever charge is released into the space?

✅ Before You Answer

• Identify which choice reflects a pre‑engineered, fixed quantity of CO₂ based on the space’s volume and required concentration, not on changing fire conditions. • Eliminate any option that requires the system to monitor temperature or time dynamically in the compartment, as low‑pressure CO₂ flooding systems are generally simpler than that. • Check which option best matches how a designer would ensure every part of the compartment gets the needed CO₂ concentration—via the way the system is piped and arranged for each protected space.