PCN NDT Radiographic Testing Level 2 Exam Practice Questions - PCN NDT Radiographic Testing Level 2 Exam

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According to the Inverse Square Law, if the radiation intensity is 100 mR/hr at 1 meter from the source, what would it be at 2 meters?

25 mR/hr 50 mR/hr 200 mR/hr 400 mR/hr

Correct Answer:

25 mR/hr

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