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Worksheetswastewater story class 7
Total questions: 14
Worksheet time: 14mins
when is the world water day celebrated ?
13 september
2 october
22 march
cleaning of water is a process of removing contaminants from the wastewater, which is commonly known as -----------
(a)
The dirty water or the uncleaned water that comes from the houses, factories, offices etc.. is commonly known as ..
blue water
wastewater
sewages
organic impurities contain-
human faeces , animal waste, oil, urea.
nitrates, phosphorus, metals.
vibro cholera
the pipes which carry the dirty water are known as -
(a)
large objects like rugs, napkins, plastic bags are removed by using ?
bar screens
sludge
aeration
the grit and sand remover tank removes (a)
human excreta and urea are removed by
sludge
bar screen
sea beds
the skimmer removes oil and grease
True
False
the anaerobic bacteria releases ozone gas
TRUE
FALSE
air is pumped into the clarified water for the growth of aerobic bacteria
TRUE
FALSE
name two chemicals used in wastewater treatment plant
(a)
the short form 'wastewater treatment plant' is
WWTP
WWWP
WPWP
the swatch bharat abhiyan was started in
2014
2015
2017
2016
