Radiation Safety Practice Exam

Which method is NOT a basic way to keep ALARA?

1. Time

2. Distance

3. Shielding

4. Monitoring

The correct answer is: Monitoring

The principle of ALARA, which stands for As Low As Reasonably Achievable, encompasses three fundamental methods to minimize radiation exposure: time, distance, and shielding. Time refers to reducing the duration of exposure to radiation sources; the less time spent near the source, the lower the dose received. Distance involves maximizing the space between the radiation source and yourself, as the intensity of radiation decreases with increased distance. Shielding utilizes materials that absorb or reflect radiation to protect individuals from exposure, thus reducing the effective dose received. Monitoring, while important for ensuring safety and compliance, does not directly contribute to minimizing exposure levels. It is more about assessing and tracking radiation levels rather than implementing strategies to keep exposure as low as possible. Therefore, monitoring is not considered one of the primary methods to maintain ALARA.