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Worksheetssewage water treatment
Total questions: 12
Worksheet time: 11mins
Name
Class
Date
1.
improved water quality can be achieved by
a)
appropriate use of water
b)
careful water storage and handling
c)
proper land management
d)
all of the above
2.
A factory is located next to a river. The factory has a sewage pipe running straight out of the factory and into the river. This is an example of ________________________.
a)
point source pollution
b)
non-point pollution
c)
tertiary receiving stream
d)
primary treatment
3.
pollutants entering waterways from a general area, such as runoff from farmland or suburban communities
a)
Pollution
b)
Point Source Pollution
c)
Non-point Source Pollution
d)
Turbidity
4.
What are two things that water treatment plants need to do?
a)
Clean and disinfect the water
b)
Boil and evaporate the water
c)
Remove the animals and plants
d)
Add chemicals and remove pesticides
5.
What is the first step in the water treatment process?
a)
coagulation
b)
filtration and removal of debris, sand, grit, etc.
c)
flocs
d)
concentation
6.
What word means the solid particles that have settled out during the sedimentation process.
a)
sediment
b)
solubility
c)
settlement
d)
solidifying
7.
Preliminary treatment
a)
prevents toxic chemicals.
b)
removes large objects.
c)
is unnecessary.
d)
is useless.
8.
Which substance is used in a sewage treatment system to kill harmful bacteria?
a)
ammonia
b)
chlorine
c)
sand
d)
soap
9.
What is the role of bacteria in the water purification process?
a)
digested organic matter
b)
add chlorine
c)
nothing, we don't want them in there
d)
add nutrients to the sludge
10.
What gas must be maintained at precise levels in the aeration tank?
a)
CO2
b)
O2
c)
H2
d)
CO
11.
Bacteria are beneficial to wastewater treatment because
a)
they naturally break down organic matter
b)
they help solid material to settle out of the wastewater
c)
the nutrients produced are beneficial to the treated water
d)
they aren't beneficial
12.
The final step of the water treatment process is...
a)
Coagulation
b)
Disinfection
c)
Filtration
d)
Sedimentation
e)
Flocculation
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