Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces, such as in a pumproom, provided that the __________.
• CO₂ fire extinguishing systems behavior in enclosed spaces • Effect of CO₂ on oxygen levels and human life safety • Need to control ventilation and personnel evacuation before CO₂ release
• Which options actually protect people from suffocation when CO₂ is released into an enclosed space? • How does ventilation affect the concentration and effectiveness of CO₂ as a smothering agent for fire? • Among the choices, which one aligns with standard fixed CO₂ system procedures on ships and in pumprooms?
• Verify that the chosen option ensures no personnel remain in the space during CO₂ flooding • Confirm that ventilation is handled correctly so the CO₂ can reach and maintain the concentration needed to extinguish the fire • Eliminate any options that rely on inadequate personal protective measures (like cloths or simple masks) instead of proper evacuation and system controls
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