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Waste Water Engineering

Q1:

Clogging of sewers, is caused due to

A silting

B low discharge

C greasy and oily matters

D domestic wastes thrown in manholes

E all the above.

ANS:E - all the above.

  1. Silting: Accumulation of silt and sediment in the sewer lines can reduce the flow capacity and eventually lead to clogs.
  2. Low Discharge: Inadequate flow of wastewater through the sewer lines can contribute to the buildup of solids and materials, leading to clogs.
  3. Greasy and Oily Matters: Grease, oil, and fat can adhere to the walls of sewer pipes and accumulate over time, reducing the effective diameter of the pipe and causing clogs.
  4. Domestic Wastes Thrown in Manholes: Improper disposal of solid waste, such as garbage, debris, or large objects, into sewer manholes can obstruct the flow and contribute to clogs.
Given these factors, the correct option is: All of the above. Each of these factors can contribute to the clogging of sewers, and they often act in combination to create blockages and hinder the flow of wastewater.
 



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