Radiation safety: occupational dose limit: practice question

A Radiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Radiology · Radiation safety: occupational dose limit

Sample item

Under standard international and AERB recommendations, the annual effective dose limit for occupational workers is averaged over 5 years to be which of the following?

A20 mSv per yearB50 mSv per yearC5 mSv per yearD100 mSv per year

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. 20 mSv per year

The occupational limit is 20 mSv per year averaged over 5 consecutive years, with no single year exceeding 30 mSv in AERB rules. The public limit is 1 mSv per year. The older limit of 50 mSv per year has been replaced.

Option by option

A. 20 mSv per year (correct)
Correct. 20 mSv per year averaged over 5 years.
B. 50 mSv per year
50 mSv per year was the older annual limit.
C. 5 mSv per year
5 mSv per year is far below the occupational limit.
D. 100 mSv per year
100 mSv per year is the five-year total in older systems, not the annual limit.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is A, 20 mSv per year. The occupational limit is 20 mSv per year averaged over 5 consecutive years, with no single year exceeding 30 mSv in AERB rules.

Why is "50 mSv per year" not the answer?

50 mSv per year was the older annual limit.

Why is "5 mSv per year" not the answer?

5 mSv per year is far below the occupational limit.

Why is "100 mSv per year" not the answer?

100 mSv per year is the five-year total in older systems, not the annual limit.

What concept does this question test?

It tests Radiation safety: occupational dose limit in Radiology. The public limit is 1 mSv per year. The older limit of 50 mSv per year has been replaced.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Radiation safety: occupational dose limit?

Learn signs with the image, and the disease they point to. Then use the flashcards and the other Radiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.