What are radiological alarms used for in a plant?

• A. Posting is a notification to you of the lowest dose rate in the work area
• B. Alarms used in plant, sample air in plant
• C. Smallest particle of an element
• D. No charge

Answer: (B)

Radiological alarms exist to protect workers by monitoring radiation levels and airborne contamination and to alert you when those levels rise above safe limits. They are part of the plant’s air-monitoring system and are used to sense the presence of radioactive materials in the sampled air and trigger an alarm so immediate actions can be taken.

The best choice reflects this function: alarms are used in the plant to monitor sample air in the plant and alert if radioactive material is present, enabling quick protective responses.

The other options don’t fit: alarms don’t post the “lowest” dose rate in an area (they warn about elevations or preset threshold exceedances), they aren’t definitions of a particle’s size, and they don’t describe a property like having no charge.