Where is a personnel monitoring device worn during all working hours?

• A. At the waist
• B. On the collar
• C. In the sleeve
• D. Placed on the belt buckle

Answer: (B)

Wearing the personnel monitoring device on the collar ensures the recorded dose reflects exposure to the head and neck, which are most exposed to scatter and leakage radiation and are not fully shielded by the lead apron. This placement provides a consistent, reliable measure of the radiation dose you receive during the workday, so the dose history stays accurate across the entire shift. Placing the dosimeter at the waist, on the sleeve, or on the belt buckle would not reliably represent exposure to the critical head/neck area and could be more easily misplaced or shielded, defeating the monitoring purpose.