If there is only 1 entry/exit point into the confined space, what should be placed in the confined space and what should be applied?

If there is only 1 entry/exit point into the confined space, what should be placed in the confined space and what should be applied?

• A. Ventilation hose; carbon monoxide detector
• B. Foam blocker; electric fan
• C. Duct work; PPV
• D. Battery backup; lighting

Answer: (C)

The key idea is to establish a controlled air supply and push that air into the space when there’s only one entry/exit. Placing duct work inside the confined space provides a dedicated inlet for fresh air, and applying positive pressure ventilation (PPV) uses a fan to push that air into the space. This creates higher pressure inside than outside, helping to push smoke and heat out through the single opening and improving visibility and safety for the occupants and firefighters. Other options don’t provide a reliable air delivery path into the space with a single opening, and they don’t establish the necessary positive pressure for effective ventilation.

The key idea is to establish a controlled air supply and push that air into the space when there’s only one entry/exit. Placing duct work inside the confined space provides a dedicated inlet for fresh air, and applying positive pressure ventilation (PPV) uses a fan to push that air into the space. This creates higher pressure inside than outside, helping to push smoke and heat out through the single opening and improving visibility and safety for the occupants and firefighters. Other options don’t provide a reliable air delivery path into the space with a single opening, and they don’t establish the necessary positive pressure for effective ventilation.