In a fixed carbon dioxide extinguishing...

Question 1 of 270705eccef9ebacbc34ba4d46471

In a fixed carbon dioxide extinguishing system for a machinery space, designed WITH a stop valve in the line leading to the protected space, the flow of CO2 is established by actuating __________.

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Question 1 of 27070

In a fixed carbon dioxide extinguishing system for a machinery space, designed WITH a stop valve in the line leading to the protected space, the flow of CO2 is established by actuating __________.

🔍 Key Concepts

• Fixed CO₂ system operation sequence in machinery spaces • Difference between systems with and without a stop (isolation) valve in the main CO₂ line • Safety logic: preventing accidental discharge into the space while still allowing quick release in an emergency

💭 Think About

• First, think about why a stop valve is added to the CO₂ line and what extra step it might require compared to a system without a stop valve. • Consider how many separate operator actions are normally required: (1) to release CO₂ from the storage bottles, and (2) to allow it to enter the machinery space. • Ask yourself: does the design intend that CO₂ can flow into the space after just one action, or is there a deliberate requirement for more than one to prevent accidental flooding of the space?

✅ Before You Answer

• Verify how many distinct manual operations are involved: releasing CO₂ from cylinders vs. opening a stop valve in the discharge line. • Check whether the control(s) for cylinder release and the valve position are combined into one action or require separate actions. • Confirm that the question specifically says: "designed WITH a stop valve in the line" — focus on how that added valve changes the number of actions needed to actually establish flow into the space.