Which of the following is NOT a method to reduce exposure?

• A. Install temporary shielding
• B. Remove or flush hot spot/source from area
• C. Increase the duration of exposure
• D. Use long-handed tools to maintain distance

Answer: (C)

The idea being tested is how to lower radiation exposure by controlling time, distance, and shielding. Using shielding creates a barrier that attenuates radiation, cutting down what workers receive. Removing or flushing the hot spot or source from the area eliminates the radiation source from the workspace, which greatly reduces exposure. Using long-handed tools to keep some distance from the source leverages the distance effect: as you get farther away, dose rate drops. Increasing the duration of exposure, on the other hand, would raise the total dose received, so it does not reduce exposure.