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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
Sewage is mainly a
liquid waste.
solid waste.
gaseous waste.
mixture of solid and gas.
- 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
sewers
sewerage
transport system.
treatment plant.
- 7. Multiple Choice
The biogas product is used as a source of ___________.
Rains
Energy
Oils
All of these
- 8. Multiple Choice
What decomposes the sludge ______________.
Anaerobic Bacteria
Aerobic Bateria
Both of the above
None of these
- 9. Multiple ChoiceWhich of the following is a characteristic of freshwater?It can be safe for humans to drinkOceans are made out of itIt contains saltThings float easier
- 10. Multiple Choice
We should not throw cooking oil and paint down the drain because
they break the pipe
they harden and clog the pipe
they flow through the drain freely
None of these
- 11. Fill in the Blank
______________________ is a process in which the waste-water is purified and cleaned before it enters any water body.
(Please write answer in CAPITAL letters)
Hint : It contains the word cleaning in it
- 12. Multiple Choice
What happens to the 'dried sludge'
It is also treated with the sewage
It's used for other products
It's disposed of
- 13. Multiple Choice
where is the "The treated water" released to :
It's released into the ocean
It's released to the local waterways
It's dumped in sewage water
- 14. Multiple Choice
What are the uses of "Treated water "
Irrigation of crops
recreational Activities
Sustaining aquatic life
To supply drinking water
- 15. Multiple Choice
When the water is clean where is it returned to?
Our taps.
The sea.
The river.
The reservoir.
- 16. Multiple Choice
Untreated excreta is a _____________________.
Waste Water
Health Hazard
Manure
None of these
- 17. Multiple Choice
In which part of the Waste water treatment does the the sludge and scum separated from the liquid?
Inlet works
Clarifiers
Sewage treatment plant
Bio reactor
- 18. Multiple Choice
Pick from the following one chemical used to disinfect water.
chlorine
coal
washing soda
silica
- 19. Multiple Choice
Which of the following chacteristic nature will indicate the waste water?
Dirty look
Foul smell
Mixed with lather
All of these
- 20. Multiple Choice
In the treatment of waste water, following steps are involved. (i) aeration (ii) removal of large objects (iii) chlorination The correct order of these steps is
(i),(iii),(ii)
(iii), (ii), (i)
(i), (ii), (iii)
(ii), (i), (iii)
- 21. Fill in the Blank
Drains get blocked by ------------ and ---------------.
- 22. Multiple Choice
Which one of the following is used in vermi-processing toilet?
earthworm
cockroach
none of these
both of these
- 23. Fill in the Blank
Sewage is mainly a _________________-waste
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