Q. Sound becomes hazardous noise pollution at decibels?
A) above 80 db
B) above 120 db
C) above 30 db
D) above 50 db
✔ Correct Answer: above 120 db
Exam Insight
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A) above 80 db
B) above 120 db
C) above 30 db
D) above 50 db
✔ Correct Answer: above 120 db
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