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CWEA Wastewater Regulations and Compliance Exam
Practice Questions And Correct Answers||Verified
Exam!!|| (Verified Answers) Plus Rationale 2026/2027
Q&A| Instant Download Pdf
To find the proper protective gear to use while inspecting
an area where a hazardous chemical is used, you would: -
Answer-check the MSDS for chemicals used.
Why are gasoline and volatile solvents objectionable when
present in a sewer? - Answer-They can produce an
explosion hazard.
When inspecting a plating shop, personal protective
equipment would include: - Answer-eye goggles or face
shield, chemical resistant gloves, and overalls.
A solution with a pH of 5 has a concentration of hydrogen
ions that is how many times higher than a solution with a
pH of 7? - Answer-100 times higher
High pH wastewater is neutralized by adding: - Answer-
H2SO4 / sulfuric acid
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When working in the street, signs and cones are needed
when: - Answer-over half of the street is blocked.
What is the danger of asphyxiation set point for oxygen on
an atmospheric monitor? - Answer-19.5 percent
A common technology to recover chemicals from rinse
water include: - Answer-ion exchange.
Is an essential part of any sampling quality control
methodology: - Answer-Proper cleaning techniques for
sampling equipment
What are the types of stormwater pollution? - Answer-
Sediment, BOD, Nutrients
How often must Significant industrial users (SIUs) be
inspected? - Answer-Once a year
A solution of ferrous chloride used at a pretreatment
facility contains 30 percent ferrous chloride and has a
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density of 1.33 g/mL. How many grams of ferrous chloride
are in one liter of the solution? - Answer-399 grams per
liter
Sodium hydroxide is commonly referred to as: - Answer-
caustic soda.
Which of the following does an ultrafiltration system
remove from wastewater? - Answer-suspended solids.
Low pH wastewater is neutralized by adding: - Answer-
Sodium hydroxide NaOH
A POTW must retain Industrial User records for a
minimum of: - Answer-3 years
The Federal Act that introduced the concept of cradle to
grave manifesting for hazardous waste products is: -
Answer-Resource Conservation and Recovery Act
(RCRA).
Waste discharge regulations can be concentration- or
mass-based except for: - Answer-pH and temperature.
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New Categorical Dischargers must submit a Baseline
Monitoring Report to the POTW control authority prior to
the planned commencement of discharge by at least: -
Answer-90 days
Lead acetate paper is used to determine the presence of: -
Answer-hydrogen sulfide.
Prohibited discharges from industrial users to POTWs, as
stipulated in the Clean Water Act, are pollutants that: -
Answer-create a fire or explosion hazard in the sewer or
POTW.
"MSDS" is an acronym for what? - Answer-Material Safety
Data Sheet
Safety hazards associated with hydrogen sulfide in sewer
systems include: - Answer-toxic gasses
Lead acetate paper is used to determine the presence of: -
Answer-hydrogen sulfide.
CWEA Wastewater Regulations and Compliance Exam
Practice Questions And Correct Answers||Verified
Exam!!|| (Verified Answers) Plus Rationale 2026/2027
Q&A| Instant Download Pdf
To find the proper protective gear to use while inspecting
an area where a hazardous chemical is used, you would: -
Answer-check the MSDS for chemicals used.
Why are gasoline and volatile solvents objectionable when
present in a sewer? - Answer-They can produce an
explosion hazard.
When inspecting a plating shop, personal protective
equipment would include: - Answer-eye goggles or face
shield, chemical resistant gloves, and overalls.
A solution with a pH of 5 has a concentration of hydrogen
ions that is how many times higher than a solution with a
pH of 7? - Answer-100 times higher
High pH wastewater is neutralized by adding: - Answer-
H2SO4 / sulfuric acid
,2|Page
When working in the street, signs and cones are needed
when: - Answer-over half of the street is blocked.
What is the danger of asphyxiation set point for oxygen on
an atmospheric monitor? - Answer-19.5 percent
A common technology to recover chemicals from rinse
water include: - Answer-ion exchange.
Is an essential part of any sampling quality control
methodology: - Answer-Proper cleaning techniques for
sampling equipment
What are the types of stormwater pollution? - Answer-
Sediment, BOD, Nutrients
How often must Significant industrial users (SIUs) be
inspected? - Answer-Once a year
A solution of ferrous chloride used at a pretreatment
facility contains 30 percent ferrous chloride and has a
,3|Page
density of 1.33 g/mL. How many grams of ferrous chloride
are in one liter of the solution? - Answer-399 grams per
liter
Sodium hydroxide is commonly referred to as: - Answer-
caustic soda.
Which of the following does an ultrafiltration system
remove from wastewater? - Answer-suspended solids.
Low pH wastewater is neutralized by adding: - Answer-
Sodium hydroxide NaOH
A POTW must retain Industrial User records for a
minimum of: - Answer-3 years
The Federal Act that introduced the concept of cradle to
grave manifesting for hazardous waste products is: -
Answer-Resource Conservation and Recovery Act
(RCRA).
Waste discharge regulations can be concentration- or
mass-based except for: - Answer-pH and temperature.
, 4|Page
New Categorical Dischargers must submit a Baseline
Monitoring Report to the POTW control authority prior to
the planned commencement of discharge by at least: -
Answer-90 days
Lead acetate paper is used to determine the presence of: -
Answer-hydrogen sulfide.
Prohibited discharges from industrial users to POTWs, as
stipulated in the Clean Water Act, are pollutants that: -
Answer-create a fire or explosion hazard in the sewer or
POTW.
"MSDS" is an acronym for what? - Answer-Material Safety
Data Sheet
Safety hazards associated with hydrogen sulfide in sewer
systems include: - Answer-toxic gasses
Lead acetate paper is used to determine the presence of: -
Answer-hydrogen sulfide.
