🔍 Key Concepts

• Fixed CO₂ fire extinguishing systems and why CO₂ is dangerous to personnel • What actions must occur automatically when CO₂ is about to be released • The difference between local space alarms/controls and alarms in other control rooms

💭 Think About

• Ask which option most directly protects people who might still be in the protected space when CO₂ is discharged • Consider which functions are usually done by separate switches or interlocks rather than by the CO₂ release valve itself • Think about what must happen immediately and without relying on human memory once the release control valve is operated

✅ Before You Answer

• Verify which function is required by safety rules to be automatic upon operation of the CO₂ release control valve • Check whether ventilation shutdown is normally tied to separate fan/vent stop controls or to the valve itself on exam questions • Confirm whether the alarm that must operate automatically is intended to warn all personnel on board or just in one control room