A fixed carbon dioxide extinguishing system...

Question 1 of 2707066636eec28f7522a1c51c334

A fixed carbon dioxide extinguishing system for a machinery space, designed WITHOUT a stop valve in the line leading to the protected space, is actuated by __________.

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Question 1 of 27070

A fixed carbon dioxide extinguishing system for a machinery space, designed WITHOUT a stop valve in the line leading to the protected space, is actuated by __________.

🔍 Key Concepts

• Fixed CO₂ fire extinguishing systems for machinery spaces • Difference between systems WITH a stop (isolation) valve and systems WITHOUT a stop valve • Safety requirement that CO₂ discharge cannot be too easy or too complicated in an emergency

💭 Think About

• Think about why regulations often require more than one deliberate action before releasing CO₂ into a space where people may be present. • Ask yourself: if there is NO stop valve in the line, what extra safeguard (if any) must the operating arrangement provide? • Consider how many separate, distinct operations the operator would reasonably need to perform to both arm and then discharge the system.

✅ Before You Answer

• Check how many independent actions are typically required to (1) release the CO₂ from the cylinders and (2) actually admit it to the protected space. • Verify whether the number of controls changes when a stop valve is present versus when it is NOT present. • Confirm that each "control" means a separate, intentional operation (for example: opening a pilot valve, operating a release lever, opening a directional valve), not just steps in using the same handle.