Radiation Safety Practice Exam

Which group do non-self-reading external dosimeters fall into?

1. Film badges and TLD

2. OSLDs and Film badges

3. SRDs and Body monitoring

4. Electronic dosimeters and Film badges

The correct answer is: OSLDs and Film badges

Non-self-reading external dosimeters are devices designed to measure and record exposure to ionizing radiation but typically do not provide real-time feedback to the wearer. The correct answer highlights a combination of optically stimulated luminescent dosimeters (OSLDs) and film badges, both of which are widely recognized as non-self-reading external dosimeters. Film badges work by using photographic film that gets exposed to radiation, resulting in a visual record of radiation dose; however, this requires developing the film after exposure to read the dose, which means they do not give an immediate reading. Similarly, OSLDs utilize advanced materials that store energy from radiation exposure and require specialized equipment to read and interpret this stored data after the fact. Both of these devices are designed to provide cumulative dose information, rather than immediate feedback on radiation exposure. The other group options may include devices that serve different purposes or operate under different principles. For instance, some electronic dosimeters do provide real-time readings, contradicting the non-self-reading characterization. Therefore, the combination of OSLDs and film badges accurately represents the category of non-self-reading external dosimeters, making it the correct choice.