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Water Standards, Treatment, Monitoring
Which best explains why communities do not use tertiary (level 3) water treatment?
Tradeoff
Water Standards, Treatment, Monitoring
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1
Tradeoff
the exchange of one thing for another
a situation that involves losing one thing to gain another
spending money to not hurt the environment
a balance between costs and benefits
2
Which best explains why communities do not use tertiary (level 3) water treatment?
The cost of the procedure is too high for most communities.
The water would not taste as good.
The tertiary treatment plants require too much land space
It would put water bottling companies out of business.
3
Why is arsenic contamination difficult to monitor?
It is odorless and tasteless.
It is present everywhere
It shows few symptoms.
4
Which
best
explains why most prescription drugs should not be disposed of in the toilet?
The drugs may not dissolve.
The drugs may enter the water cycle.
The drugs can clog drains.
The drugs may become less effective.
5
Why is it necessary to have public water treatment systems?
to manage runoff from erosion of topsoil and city streets
to collect and redistribute nutrients in the water cycle
to maintain the good health of environments and organisms
6
Based on the data, which
best
explains the quality of the drinking water?
It is safe - 2 samples are below the recommended limit.
It is unsafe - last 2 samples are below recommended limit.
It is unsafe - last 2 samples are above recommended limit.
It is safe - the average of the samples is below the limit
7
This diagram shows pH ranges from 0 to 14.How does pollution affect the pH of a stream?
acid rain causes the pH in the stream to decrease.
Pollution decreases photosynthesis causing stability in pH
acid rain causes pH in the stream to increase.
8
Which best describes an economic tradeoff people must make in order to keep good water quality?
informational meetings to prevent zoning restrictions
tax incentives for industrial development and expansion
enforcing environment regulation to stop pointsource
community awareness program to teach farmers about pesticide
9
Justin wants to improve the quality of streams on his farm. Which will have the most impact?
growing cotton instead of corn
planting a vegetated buffer along the perimeter of the field
using a tractor with smaller wheels
increasing the amount of fertilizer used on the crops
10
Why is filtration an important part of water treatment?
Filtration adds vitamins and minerals to drinking water.
Filtration removes small particles from the water.
Filtration adds chlorine to water to kill microorganisms.
Filtration guarantees a clear coloring in water.
11
How can humans
most directly
influence what happens in a river basin in a positive way?
by draining swamps, wetlands, marshes, and bogs
by promoting public awareness through education
by protecting soil, water, air, plants, and animals
by developing a task force for creating estuaries
12
an area of the production, distribution or trade, and consumption of goods and services
pollution
businesses
economy
money
13
What water quality standard pertains to bacteria levels?
dissolved oxygen levels
poop
nitrate levels
fecal coliform levels
14
Which act of stewardship most directly impacts the
water cycle
?
carpooling to work during the week
walking to work or school
recycling aluminum soda cans
limiting shower time to 10 minutes
15
How can we determine if methods used to keep water quality can justify the economic trade-offs?
by analyzing costs of educational programs
by evaluating health benefits of higher water quality
by reducing tax incentives for farmers
by creating monetary incentives for industry
16
Why are Americans warned to avoid drinking the water when visiting developing countries?
Water in developing countries is discolored.
Water in developing countries has large amounts of chlorine.
Water in developing countries cause illness. (makes you sick
Water in developing countries is made of different elements.
17
How could government laws have the most direct impact on water quality?
provide rewards to use liquid absorbing surfaces
provide rewards to recycle
provide rewards to use solar power
18
Why are water treatment design engineers most likely be interested in groundwater quality data?
to determine how deep artesian wells should be drilled
to determine how much water can be treated for use
to determine how much & which type of treatment is required
19
Which activity should be reported through a pollution prevention hotline?
a strong gust of wind blowing leaves into a storm drain
stormwater flowing into a drain after a heavy rain event
Graffiti that says “Don’t Dump - Drains to River” near drain
someone dumping used motor oil into a storm drain
20
Which
best
explains the difference between primary and secondary sewage treatment?
Primary treatment removes phosphates and nitrates.
Secondary treatment removes all of the pollutants.
Secondary treatment is less expensive.
Primary treatment removes the solid materials.
21
Which process could the city use to convert ocean water to drinking water?
desalination
condensation
infiltration
evaporation
22
What does 'economic' mean
relating to economics or the economy
relating to money
relating to pollution
relating to businesses
23
Which is used by sewage treatment plants to kill harmful bacteria in water?
detergents
chlorine
coagulants
filters
