Q10 of 27 Page 93

Which of the following is not a source of waste water?

Sewer contains the waste water as it is an underground carriage system for the sewage. But it doesn’t produce any additional sewage. Thus, it is not a source of wastewater.

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Why are open drains a concern?

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State whether the following statements are True or False. In case a statement is false, write the correct statement.

(a) Sewage is a solid waste which causes water pollution and soil pollution.


(b) Used water is wastewater.


(c) Wastewater could be reused.


(d) Where underground sewerage systems and refuse disposal systems are not available, the high-cost on-site sanitation system can be adopted.