Practise Medical Dosimetry Certification Exam (CMD) with a short sample and answer explanations. These are independent learning materials, not official exam questions or a pass prediction.

Exam outline and official sources

Medical Dosimetrist Certification Board (MDCB) · Applicant Handbook 2027, January 21–23, 2027 administration; posted September 4, 2026; CMD Test Specifications Matrix derived from the 2023 Job Task Analysis. The assigned workbook label maps to the MDCB examination awarding the Certified Medical Dosimetrist credential.

This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.

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Medical Dosimetry Certification Exam (CMD)

Start with 20 free questions, then review the explanations and any topics you missed.

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A narrow monoenergetic photon beam passes through an attenuator with a constant half-value layer of 4 mm. Neglect scatter. What fraction of the initial intensity remains after 12 mm?

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