Define hot, warm, and cold zones and explain the restrictions for each.

• A. Cold zone is the clean area with no contaminants; supports and staging; Warm zone is decontamination and medical support; Hot zone is the hazard area where entry occurs; only trained personnel with PPE may enter.
• B. Cold zone is the hazard area; Warm zone is outside; Hot zone is the decontamination.
• C. Cold zone is outside the facility; Warm zone is inside the facility; Hot zone is the office area.
• D. Hot, warm, and cold zones have no access restrictions.

Answer: (A)

Understanding the three zones is about defining where contamination may exist and who is allowed to be where. The cold zone is the clean area outside the hazard, used for support, command, staging, and other activities that don’t involve exposure to the contaminant. The warm zone sits between the clean cold zone and the hot hazard zone and serves as the decontamination and medical support area, acting as the controlled transition where personnel and equipment can undergo decon and receive medical oversight if needed. The hot zone is the hazard area where contamination is present; entry is restricted to trained personnel with the proper PPE, and operations focus on containment, assessment, and safe entry/exit.

This matches the described setup: cold zone as the clean, supporting area; warm zone as the decontamination/medical support space; hot zone as the contained hazard area with restricted access. The other options mislabel zones, place them in incorrect locations, or claim there are no access restrictions, which contradicts how these zones function for safety and control.