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- 1. Multiple Choice
What is a sewage treatment plant?
The place where water is cleaned, filtered and tested before re-entering the water cycle.
The place where water is cleaned, filtered and tested before going to our houses.
The network of pipes that carry sewage (dirty water) from our houses.
The place where water is bottled for drinking.
- 2. Multiple Choice
What type of living things eat the organic matter in the sewage?
Plants
Animals
Bacteria
fungi
- 3. Multiple Choice
What happens to the sewage in the first step of treatment?
The organic matter is eaten by bacteria.
The sewage water is aerated.
It is screened to remove solid wastes
It is filtered and disinfected.
- 4. Multiple Choice
Which of the following is/are products of wastewater treatment?
Biogas
Sludge
Aerator
Both biogas and sludge
- 5. Multiple Choice
An open-drain system is a breeding place for which of the following.
Flies
Mosquitoes
Organisms which cause diseases
All of these
- 6. Multiple Choice
The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as
pipeline transport
sewage system
transport system.
treatment plant.
- 7. Multiple Choice
We should not throw paints and greasy substances down the drain because
they break the pipe
they harden and clog the pipe
they flow through the drain freely
None of these
- 8. Multiple Choice
Water polluted by various human activities causes a number of water-borne diseases. Which of the following is not a waterborne disease?
Cholera
Typhoid
Asthma
Dysentry
- 9. Multiple Choice
In which step solid waste is removed using screens in waste water treatment.
Primary treatment
Secondary treatment
Tertiary treatment
- 10. Multiple Choice
What is obtained after aeration step?
Primary sludge
secondary sludge
solid waste materials
- 11. Multiple Choice
Process whereby water bodies receive excess nutrients-
algal bloom
water pollution
eutrophication
sewage
- 12. Multiple Choice
Waste water from toilets is often referred to as-
grey water
black water
sludge
effluent
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