Railways General Science & Technology Ecology and Environment Sample Paper Ecology & Environment Awareness Sample Test Paper-35

  • question_answer
    Sound becomes hazardous noise pollution at level

    A)  Above 30 dB    

    B)  above 80 dB

    C)  Above 100 dB

    D)         above 120 dB

    Correct Answer: B

    Solution :

    [b] Above 80 dB sound becomes hazardous.

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