The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about ____________ decibels?
Correct answer: B. 90
- A. 60
- B. 90
- C. 105
- D. 120
Explanation
The commonly used occupational limit for continuous noise exposure over an eight-hour shift is about 90 dB. Higher levels such as 105 or 120 dB can cause hearing damage in much shorter periods.
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