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  9. Q20

PPSC PCS 2015 · Question 20 of 100

High Biological Oxygen Demand (BOD) indicates

Environment

  1. AHigh level of Microbial PollutionCorrect
  2. BLow level of Microbial Pollution
  3. CAbsence of Microbial Pollution
  4. DNone of the above

Answer: A. High level of Microbial Pollution

Explanation

High biochemical oxygen demand means microbes are consuming large amounts of oxygen to break down organic pollutants, indicating heavy microbial pollution.

Source: https://cdn.mindspritesolutions.com/examrace/SPSC/Punjab-PSC/Punjab-PSC-Past-Papers/Punjab-Civil-Service-2015-Official-Paper-1-Part-1.pdf

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