PIR (Passive Infrared) detectors are most effective when motion occurs across the sensor’s field of view. This maximizes the differential detection of body heat moving against the ambient background.

B and C (Movement toward/away) produce weaker thermal contrasts.

A (Defeat attempts) is a risk but not a mounting consideration.

Plan drawings (also known as floor plans) provide a top-down view of the facility and include the layout of rooms, walls, doors, and most importantly, the placement of security devices such as cameras, sensors, and card readers. These drawings are essential during a security survey for accurately locating and assessing the effectiveness of physical security measures.

A (Elevation drawings) show vertical views, not detailed placement.

B (Detail drawings) are close-ups of specific components.

C (Riser diagrams) depict system wiring paths, not physical placement.

Exclusion areas are the most secure zones within a controlled facility, designed specifically for handling or storing high-value, classified, or critical assets. These areas have strict access controls, surveillance, and protective measures in place to prevent unauthorized access or theft.

Limited areas (A) offer less stringent protection than exclusion areas.

Multiple areas (C) is a non-standard term.

“None of the above” (D) is incorrect because exclusion areas is the correct answer.