During sheltering, which action supports maintaining a safe haven?

During sheltering, which action supports maintaining a safe haven?

• A. Open the door to ventilate
• B. Close the door
• C. Turn on all lights
• D. Remove protective gear

Answer: (B)

Maintaining a safe haven means preserving a sealed, controlled space from outside hazards. Keeping the door closed is the key because it preserves the barrier against outside air, smoke, dust, and chemical vapors, helping to limit contaminant entry and maintain safer conditions inside. Opening the door would create a direct pathway for contaminants to flow in and undermine protection. Turning on lights doesn’t affect the protective barrier, and removing protective gear would increase personal exposure. Ventilation, if needed, should follow official guidance and be done only through approved methods, not by opening doors.

Maintaining a safe haven means preserving a sealed, controlled space from outside hazards. Keeping the door closed is the key because it preserves the barrier against outside air, smoke, dust, and chemical vapors, helping to limit contaminant entry and maintain safer conditions inside. Opening the door would create a direct pathway for contaminants to flow in and undermine protection. Turning on lights doesn’t affect the protective barrier, and removing protective gear would increase personal exposure. Ventilation, if needed, should follow official guidance and be done only through approved methods, not by opening doors.