Animal waste, oil and urea are some of the organic impurities
present in sewage. Name two more organic impurities present
in sewage.
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.
Which of the following is not a source of waste water?
(a) Sewers
(b) Homes
(c) Industries
(d) Hospitals
In a filtration plant water is filtered using layers of
(a) sand and clay.
(b) clay and fine gravel.
(c) sand and fine gravel.
(d) sand, fine gravel and medium gravel.
Which of the following is a part of inorganic impurities of the
sewage?
(a) Pesticides
(b) Urea
(c) Phosphates
(d) Vegetable waste
The system of a network of pipes used for taking away
wastewater from homes or public buildings to the treatment
plant is known as
(a) sewers.
(b) sewerage.
(c) transport system.
(d) treatment plant.
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