Which protective action must be taken during shelter in place protection?

Which protective action must be taken during shelter in place protection?

• A. Close all windows.
• B. Establish a water curtain.
• C. Use positive pressure to protect the structure.
• D. Ensure heating, ventilation, and air conditioning remains operating.

Answer: (A)

During shelter in place, the aim is to keep hazardous material outside by blocking air from moving between the outside and the inside. The simplest and most effective action is to close all exterior openings, especially windows, to seal the building and reduce contaminant entry. Water curtains aren’t part of shelter-in-place protection; they’re used for other purposes and don’t address keeping a structure airtight. Creating positive pressure inside isn’t a standard shelter-in-place tactic and can complicate the situation. Keeping the heating, ventilation, and air conditioning system running tends to pull in outdoor air and potential contaminants, so it’s not advised unless authorities direct otherwise. The key step is closing windows to limit outdoor air entry and protect occupants until it’s safe to resume normal activities.

During shelter in place, the aim is to keep hazardous material outside by blocking air from moving between the outside and the inside. The simplest and most effective action is to close all exterior openings, especially windows, to seal the building and reduce contaminant entry. Water curtains aren’t part of shelter-in-place protection; they’re used for other purposes and don’t address keeping a structure airtight. Creating positive pressure inside isn’t a standard shelter-in-place tactic and can complicate the situation. Keeping the heating, ventilation, and air conditioning system running tends to pull in outdoor air and potential contaminants, so it’s not advised unless authorities direct otherwise. The key step is closing windows to limit outdoor air entry and protect occupants until it’s safe to resume normal activities.