Which of the following statements describes how the main bank of CO₂ bottles is released into an engine room from most fixed CO₂ fire extinguishing systems?
• How a fixed CO₂ fire extinguishing system operates in an engine room • The purpose of pilot cylinders versus the main bank of cylinders • How CO₂ systems are typically automatically or semi‑automatically actuated
• Think about whether the crew would realistically open many bottles one by one in an emergency with smoke and heat present. • Ask yourself what small initial action or pressure source could be used to trigger the full main bank automatically. • Consider which option best reflects a common automatic release method used to open many cylinders at once.
• Identify which part of the system is designed to initiate discharge (pilot vs main cylinders). • Confirm which method would allow all or most bottles to open nearly simultaneously with minimal manual effort. • Eliminate any options that would be too slow or complex to operate safely in a real engine‑room fire.
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