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State PCS PYQPrelims 2018

UPPCS · Question 124

Which of the following represents the decibel level of rustling of tree leaves in normal circumstance?

  1. 10 dB
  2. 20 dB
  3. 60 dB
  4. 100 dB
Show answer & explanation

Answer: (B) 20 dB

Explanation

Rustling leaves are about 20 dB (a whisper is about 30 dB, normal conversation about 60 dB).