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Class 7 Science
Wastewater Story
Quiz 1
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Which one of the following is a quality of wastewater?
0%
Foul smell
0%
Bad taste
0%
Dirty look
0%
All of these
Explanation
All of these
Period 2005-2015 is being celebrated as the international decade for action on
0%
water for life
0%
education for all
0%
global war
0%
terrorism
Explanation
water for life
In sewerage manholes are located at every
0%
20-25 m
0%
50-60 m
0%
90-100 m
0%
100-110 m
Explanation
50-60 m
Which one of the following is a step in wastewater treatment?
0%
Aeration
0%
Filtration
0%
Chlorination
0%
All of these
Explanation
All of these
Sludge in separate tanks is decomposed to get biogas by
0%
yeasts
0%
aerobic bacteria
0%
anaerobic bacteria
0%
none of these
Explanation
anaerobic bacteria
Which one of the following is used in vermi-processing toilet?
0%
Earthworm
0%
Cockroach
0%
Both of these
0%
None of these
Explanation
Earthworm
Sewage is mainly a
0%
liquid waste
0%
Solid waste
0%
gaseous waste
0%
Mixture of solid and gas
Explanation
liquid waste
Which of the following is/are products of wastewater treatment?
0%
Biogas
0%
Sludge
0%
Both Biogas and sludge
0%
Aerator
Explanation
Both Biogas and sludge
Open drain system is a breeding place for which of the following:
0%
Files
0%
Mosquitoes
0%
Organisms which cause diseases
0%
All of these
Explanation
All of these
Which of the following is not a source of waste water?
0%
Sewers
0%
Homes
0%
Industries
0%
Hospitals
Explanation
Sewers
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