3. Which one of the following is a step in wastewater treatment?
(a) Aeration
(b) Filtration
(c) Chlorination
(d) All of these
4.Open drain system is a breeding place for which of the following:
(a) Files
(b) Mosquitoes
(c) Organisms which cause diseases
(d) All of these
5. Which of the following is not a source of waste water?
(a) Sewers
(b) Homes
(c) Industries
(d) Hospitals
Answers
Answer:
(3) (d) All of these
(4) (d) All of these
(5) (a) Sewers
3. Which one of the following is a step in wastewater treatment?
The Correct Option is...
✔ (d) All of these
Aeration, Filtration, and Chlorination all of these are steps in wastewater treatment.
Aeration is the process by which air circulates, mixes, or dissolves a liquid or substance. Filtration is the process in which solid particles in a liquid or gaseous fluid are removed using a filter medium that allows the fluid to pass through but retains the solid particles. Chlorination is the process of adding chlorine to drinking water to kill parasites, bacteria, and viruses.
4. Open drain system is a breeding place for which of the following:
The Correct Option is...
✔ (d) All of these
An open-drain system is a breeding place for all these insects like flies, Mosquitoes and Organisms which cause diseases.
5. Which of the following is not a source of wastewater?
The Correct Option is...
✔ (a) Sewers
Sewers are not a source of wastewater, because it is a drainage system of liquid wastewater.
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