Environmental health: ambient noise standards: practice question

A PSM 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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PSM · Environmental health: ambient noise standards

Sample item

As per the national ambient noise standards, the permissible noise level in a residential area is:

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

The answer and the reasoning

A. 55 dB by day and 45 dB by night

In residential zones, the limits are 55 dB(A) in the daytime and 45 dB(A) at night. Industrial areas are allowed 75 and 70 dB respectively, and silence zones are 50 and 40 dB.

Option by option

  • A. 55 dB by day and 45 dB by night (correct)

    Correct. Residential limits are 55 and 45 dB.

  • B. 40 dB by day and 30 dB by night

    40 and 30 dB are lower than any listed zone.

  • C. 90 dB by day and 80 dB by night

    90 and 80 dB are hazardous levels.

  • D. 75 dB by day and 70 dB by night

    75 and 70 dB are the industrial limits.

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.

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Questions about this PSM question

What is the answer to this PSM question?

The best answer is A, 55 dB by day and 45 dB by night. In residential zones, the limits are 55 dB(A) in the daytime and 45 dB(A) at night.

Why is "40 dB by day and 30 dB by night" not the answer?

40 and 30 dB are lower than any listed zone.

Why is "90 dB by day and 80 dB by night" not the answer?

90 and 80 dB are hazardous levels.

Why is "75 dB by day and 70 dB by night" not the answer?

75 and 70 dB are the industrial limits.

What concept does this question test?

It tests Environmental health: ambient noise standards in PSM. Industrial areas are allowed 75 and 70 dB respectively, and silence zones are 50 and 40 dB.

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 Environmental health: ambient noise standards?

Practise biostatistics with small calculations until sensitivity, predictive values and risk measures are automatic. Then use the flashcards and the other PSM 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.