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cwa Clean Water Act
Low dissolved oxygen (DO) in the water
Kill fish
Overloading a body of water with wastewater can cause? Algae blooms
Spread of waterborne diseases
Violations of safe, drinking water standards
Which water contains various waste a typically consist of? 99.94% liquid and 0.06% solid
Refers to groundwater that enters the sewer through
What is infiltration?
cracks and pipes and manholes
Refers to groundwater rain and surface water that enter
What is inflow?
sewer through direct opening such as open drain cleanout
Is conducted for five days at 20°C. We think of a BOD
test as a measure of organic material but the test actually
Explain a BOD test
measures how much oxygen is needed to treat the waste
of water.
What does BOD stand for? biochemical oxygen demand
False - natural treatment systems have a limited capacity to
a simulate polls. Urban areas concentrate a large number
True or false - Natural systems have enough assimilative
of people in businesses into a small area and discharge
capacity to treat wastewater from urban areas
them into one or a few locations. The result is reduced
dissolved oxygen kills fish and other adverse ettects.
True or false - wastewater treatment is necessary to pro-
True
tect public health in the environment.
True or false - the term water resource recovery facility
was recently adapted by water environment Federation True
because it better reflect our goals as a profession.
False
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, ABC Wastewater treatment Verified Multiple Choice and Conceptual Actual Frequently
Tested Exam Questions With Reviewed 100% Correct Detailed Answers
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True or false - most of the fat oils and greases (FOG)
present in influent waste water comes from petroleum
products.
A Pathogen is Any microorganism that produces disease
Solids that are retained by a 1.3 ųm filter paper and are
Total volatile suspended solids (TVSS)
burned away in a 550 degrees Celsius furnace are
The biochemical oxygen demand (BOD) test measures
Amount of oxygen needed to stabilize wastewater
this:
Solids that are able to pass through a 1.2ųm filter paper
and remain unchanged after spending time in a furnace Dissolved and inorganic
at 550 degrees Celsius may be described as
Some treatment facilities are required to remove ammo-
Ammonia is toxic to fish and aquatic life.
nia as part of their discharge permits for this reason?
By definition, how much oxygen is required to stabilize or
1 kg to lb
treat 1 kg (lb) of BOD?
Which of the following pollutants is most likely to cause an
Phosphorus
algae bloom in a lake or river?
They can threaten human health if they are in the water
What are soluble toxins?
used for drinking or swimming.
They can adsorb to sediment, be consumed by aquatic life,
What are insoluble toxins?
thus enter the human food chain (via bioaccumulation)
When was the clean water drinking act promulgated 1972
True or false - all direct discharges are required to have a
True
discharge permit.
False. Federal penalties and jail time only apply when a
True or false - an operator will be fine and serve time in
person knowingly and willfully falsifies conceal or covers
prison if the average effluence, suspended solid concen-
up a permit violation or misrepresents a permit violation
tration, excuse the limit given in the discharge permit.
with fraudulent statements.
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