ASNT Industrial Radiography Radiation Safety Practice Test

What is the minimum reading capability required for pocket ion chambers?

1. 100 mR (1 mSv)

2. 150 mR (1.5 mSv)

3. 200 mR (2 mSv)

4. 250 mR (2.5 mSv)

The correct answer is: 200 mR (2 mSv)

The minimum reading capability required for pocket ion chambers is 200 mR (2 mSv). Pocket ion chambers are commonly used in radiation safety for monitoring personal exposure to ionizing radiation. They need to have a sensitivity that allows for the detection of relatively low levels of radiation to ensure that individuals are aware of their exposure and can take necessary precautions. A reading capability of 200 mR allows the device to effectively monitor a wide range of radiation exposure situations common in industrial radiography. This level ensures that it can capture the necessary data for radiation safety management without being overly sensitive to background radiation, which could lead to false alarms or unnecessary concern. In contrast, lower values would not be sufficient for the detailed monitoring required in many situations, as they may fail to detect higher doses accurately or might be less reliable as the exposure levels increase. Thus, 200 mR is determined to be the appropriate threshold for ensuring effective monitoring and safety in environments involving ionizing radiation.