When is respirator use required in radiological work?

• A. When airborne radioactive materials are present or engineering controls are insufficient.
• B. Only during decontamination operations.
• C. When airborne materials are present or engineering controls are insufficient; requires medical clearance, fit testing, training, and selection of an appropriate respirator.
• D. Never.

Answer: (C)

When there’s a real risk of inhaling radioactive materials, or when engineering controls can’t adequately limit inhalation exposure, a respirator becomes necessary. That triggers a formal respirator program: medical clearance to ensure you can safely wear a respirator, fit testing to confirm a proper seal, training on use and limitations, and careful selection of the right type of respirator based on the specific hazard. Without airborne contamination or insufficient controls, respirators aren’t required. This explanation shows why use is tied to the presence of airborne materials or inadequate controls, and why the program elements—medical clearance, fit testing, training, and proper selection—are essential.