Question 1
Iridium-192 has a half-life of approximately 73.83 days. If a source measures 100 Ci today, what will its activity be after one half-life?
Correct Answer:
50 Ci
Question 2
Which isotope has the longest half-life among common industrial radiography sources?
Correct Answer:
Cesium-137 (30.07 years)
Question 3
What is the predominant mode of radioactive decay for Iridium-192?
Correct Answer:
Beta-minus decay accompanied by gamma emission
Question 4
Cobalt-60 emits two principal gamma photons. What are their approximate energies?
Correct Answer:
1.17 and 1.33 MeV
Question 5
Selenium-75 is typically chosen over Iridium-192 for radiography of which material range?
Correct Answer:
Thin steel and lighter alloys roughly 5-25 mm
Question 1
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About this Exam

Prepare with the ASNT IRRSP Practice Questions - ASNT Industrial Radiography Radiation Safety Personnel (IRRSP) Exam practice quiz. This question bank includes 100 questions covering source, dose, ir-192, rate, and radiation. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ASNT IRRSP Practice Questions - ASNT Industrial Radiography Radiation Safety Personnel (IRRSP) Exam

This practice set contains 100 questions from the matching question bank and focuses on source, dose, ir-192, rate, and radiation. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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