Test: Disposal Of Sewage
5 Questions MCQ Test Environmental Engineering | Test: Disposal Of Sewage
Which of the following is a prime lake pollutant.
Explanation: Phosphorous is a prime lake pollutant that promotes the algal bloom and destroys the quality and appearance of a lake.
The dilution factor is expressed by
Explanation: The dilution factor is the ratio of volume of diluted sample of water to the volume of sewage. It is used in finding the BOD of water.
The tolerance limit of BOD of sewage to be disposed on land is
Explanation: The tolerance limit of BOD of sewage to be discharged into sea water is
100ppm while to be disposed on land is 500ppm.
The tolerance limit of pH value of sewage to be discharged into sea water is
Explanation: The tolerance limit of pH value of sewage to be discharged into sea water or to be disposed on land is between 5.5 and 9ppm.
The dilution factor is 400. What should be the type of treatment given to the water?
Explanation: When the dilution factor lies between 300 and 500, then preliminary treatment is given to the water.
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