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5Dec19 FS Q23

23Noise levels at a traffic site are recorded for one hour at a sampling interval of 1 second and percentile indices of noise L1, L10, L50, L90 are computed from the data. The indices are then arranged in increasing order in terms of their values starting from minimum to maximum. Which of the following options represents their correct order?
  • Option : D
  • Explanation :
    Noise pollution is a major problem for the quality of life in urban areas. L90 describes the level which exceeded for 90% of the time that is minimum value. Whereas LO I describes the level which exceeded for only 1% of the time, that is the maximum level. So arrangement becomes L90, L50, L10, LO1.
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