The recommended maximum noise level in India?

Appeared in: UPPSC-2021

Explanation

90 decibels, which is the maximum permissible noise exposure limit for an 8-hour workday in India, as stipulated by the Factories Act, 1948.
This standard is set to prevent occupational hazards, specifically Noise-Induced Hearing Loss (NIHL), among workers in industrial settings.
The regulation follows an inverse time-intensity relationship; as the noise intensity (dB level) increases, the allowable exposure time decreases significantly.

Option A: 95 dB is an unsafe level for a full 8-hour shift. Exposure to this level is permitted, but for a much shorter duration.
Option B: 85 dB is not the maximum limit but the 'action level'. At this level, employers are required to implement hearing conservation programs.
Option D: 100 dB is a significantly high noise level. Exposure is only permitted for a very short period.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Occupational health standards for noise exposure in India as background academic context rather than a clinical decision trigger.
An occupational health nurse plays a crucial role in preventing Noise-Induced Hearing Loss (NIHL). This includes conducting baseline and annual audiometric testing for workers exposed to noise levels at or above 85 dB.
Nurses are responsible for educating workers on the importance of using hearing protection devices (HPDs) like earplugs and earmuffs, ensuring proper fit and consistent use.
Identifying early signs of hearing loss and referring workers for further evaluation is a key nursing intervention in a noisy workplace.

How to Approach the Question

First, identify the question as a factual recall question about a specific national regulation (noise levels in India).
Recognize that such questions in occupational health often refer to the standard 8-hour workday exposure limit.
Scan the options, which are all numerical values (decibels).
Recall or deduce the standard occupational limit. The 85-90 dB range is critical in occupational health. 85 dB is the 'action level' and 90 dB is the 'permissible exposure limit' for 8 hours.
Select 90 dB as the most appropriate answer for the 'maximum recommended' level for a standard workday.

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 1 p. 292-294

E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart B (pp 233-449 of 464) p. 58-60

Practise the full UPPSC-2021

Attempt every question from this paper in a timed mock, then review the full solution for each one.