ASNT Industrial Radiography Radiation Safety Practice Test

If a radiographer and assistant are exposed to a field of 2 mR/h for 4 hours, what will be the total dose received by the assistant?

1. 10 mR (100 μSv)

2. 4 mR (40 μSv)

3. 8 mR (80 μSv)

4. 16 mR (160 μSv)

The correct answer is: 8 mR (80 μSv)

To determine the total dose received by the assistant, you need to consider both the radiation exposure rate and the duration of exposure. In this case, the exposure rate is given as 2 mR/h, and the duration of exposure is 4 hours. To find the total dose, you can multiply the exposure rate by the time of exposure: Total dose = Exposure rate × Time Total dose = 2 mR/h × 4 hours Total dose = 8 mR Thus, the total dose received by the assistant is 8 mR (which is equal to 80 μSv when converted, as 1 mR is approximately equal to 10 μSv). Hence, the corresponding choice is the one that indicates 8 mR (80 μSv) as the total dose. This calculation illustrates the direct relationship between exposure rate, time, and total dose, highlighting the importance of understanding radiation safety concepts in industrial radiography.