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  4. Ecology And Environment

SSC Ecology And Environment Sample Paper NCERT Sample Paper-3

  • question_answer
    Sound above what level is considered to be hazardous noise pollution?

    A)  Above 150 dB

    B)         above 120 dB

    C)  Above 80 dB

    D)  below 30 dB

    Correct Answer: C

    Solution :

    [c] Prolonged exposure to noise level above 80 dB (decibel) gradually leads to permanent loss of hearing ability. Therefore sound above 80 dB level is considered to be a hazardous noise pollution.


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