Which term refers to the boundary marker used to indicate separation between areas?

• A. Decommission
• B. Demarcation
• C. Element
• D. Equal air pressure

Answer: (B)

Demarcation is the boundary marker used to indicate separation between areas. In infection control, demarcation lines define zones with different levels of risk—such as clean versus contaminated areas or work and transition spaces—so staff know where certain practices, PPE, or equipment restrictions apply. These markers help control traffic flow and prevent cross-contamination by making the separation explicit and enforceable, often reinforced with tape, signage, or physical barriers. The other terms don’t describe a boundary marker: decommission means removing something from service, an element is a basic part of a system, and equal air pressure is a condition that helps control airflow but is not a boundary marker.