Practice question

What is the function of lead or depleted uranium shielding inside an industrial radiography projector flask (Type B package)?

  1. To keep the source warm in cold weather
  2. To prevent the source from rusting
  3. To increase the resale value of the container
  4. To absorb intense gamma radiation emitted by high-activity sources (such as Iridium-192 or Cobalt-60), lowering external surface dose rates

Answer: D — To absorb intense gamma radiation emitted by high-activity sources (such as Iridium-192 or Cobalt-60), lowering external surface dose rates

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