Which statement is correct about the NCRP MPD?

• A. It applies to occupational exposure only
• B. It applies to non-occupationally exposed adults
• C. It applies to all exposures regardless of occupation
• D. It applies only to X-ray technicians

Answer: (B)

Maximum Permissible Dose (NCRP MPD) is a dose limit designed to protect people who may be exposed to ionizing radiation in the course of their work. It sets a yearly cap on the amount of radiation a worker can absorb, guiding protective measures, shielding, and monitoring in radiology and related fields. Because it is oriented toward occupational exposure, it applies to those who may receive radiation as part of their job, not to members of the general public who are not occupationally exposed. Public exposure is governed by separate, generally lower limits. This concept helps ensure that workers’ cumulative doses stay within a range associated with minimizing cancer risk and other radiation effects, while still allowing necessary imaging procedures to be performed safely.