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CWEA ENVIRONMENTAL COMPLIANCE EXAM 2025| BRAND
NEW ACTUAL EXAM WITH 100% VERIFIED QUESTIONS AND
CORRECT SOLUTIONS| GUARANTEED VALUE PACK| ACE
YOUR GRADES.
1. An industry operating an 8-hour shift, 5 days per week, generates 100,000 gallons of
wastewater per shift. Their pretreatment system has a capacity of 150 gallons per
minute. How long must the pretreatment facility operate to process the wastewater
generated each day? - correct answer - 11.1 hours
2. An industry has five sewer connections with the following discharge rates: 1) 300
gpd, 2) 75 gpd, 3) 725 gpd, 4) 1,200 gpd, 5) 200 gpd A flow-weighted composite
sample of 5 liters is desired. How many milliliters of sample from each connection
should be composited? - correct answer - 600, 150, 1450, 2400, 400
3. Prohibited discharges from industrial users to POTWs, as stipulated in the Clean
Water Act, are pollutants that: - correct answer - create a fire or explosion hazard in
the sewer or POTW.
4. "MSDS" is an acronym for what? - correct answer - Material Safety Data Sheet
5. Safety hazards associated with hydrogen sulfide in sewer systems include: - correct
answer - toxic gasses.
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6. A significant industrial user can be defined as: - correct answer - a federal
categorical industrial user.
7. Lead acetate paper is used to determine the presence of: - correct answer -
hydrogen sulfide.
8. What is the average detention time, in minutes, for a 40,000 gpd flow going through
a 1,500-gallon interceptor? - correct answer - 54 minutes
9. The following type of flow measuring device can be installed in a pipe flowing full: -
correct answer - Venturi.
10. What total volume of spill containment capacity in gallons is needed for the following
tanks if a 12-inch rainfall occurs during a 24-hour period on a common 200-foot by
200-foot spill-containment pad? Assume 100 percent containment of all tank
capacity is needed. Tank I: Cube, 6 ft wide, 6 ft long, and 6 ft high. Tank II:
Rectangular, 4 ft wide, 20 ft long, and 3 ft high. Tank III: Cylindrical, 8 ft in diameter
and 9 ft high. - correct answer - 305,992 gallons
11. An industry has a wastewater discharge of 10,000 gallons per day containing 5 mg/L
of copper. What is the industry's mass emission rate of copper in pounds per day? -
correct answer - 0.42 lb/day
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12. What kind of container and preservative is required for samples to be analyzed for
oil and grease? - correct answer - Glass, Cool 4°C, H2SO4 to pH<2
13. A chain-of-custody form: - correct answer - is the ability to trace sample possession
and handling from collection through analysis.
14. The BOD determination is an empirical test in which standardized laboratory
procedures are used to: - correct answer - determine the relative oxygen
requirements of wastewaters, effluents, and polluted waters.
15. A confined space is one that: - correct answer - is large enough to enter and work in,
has a restricted entry/exit, and is not meant for continuous occupancy.
16. Industrial plants producing wastes with a high suspended solids content include: -
correct answer - breweries.
17. Whenever an inspector or sampling technician is in a manhole, how many people
should there be above to respond in the event of an emergency? - correct answer -
Two
18. Alkalinity is reported as: - correct answer - alkalinity, mg/L CaCO3.
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19. What is the normality of sodium hydroxide (NaOH) solution of 25 mL if a 0.01 N
sulfuric acid solution neutralizes 100 mL of the NaOH solution? - correct answer -
0.0025 N
20. A major pollutant of concern from a printed circuit board shop is: - correct answer -
copper.
21. To find the proper protective gear to use while inspecting an area where a
hazardous chemical is used, you would: - correct answer - check the MSDS for
chemicals used.
22. Why are gasoline and volatile solvents objectionable when present in a sewer? -
correct answer - They can produce an explosion hazard.
23. When inspecting a plating shop, personal protective equipment would include: -
correct answer - eye goggles or face shield, chemical resistant gloves, and overalls.
24. 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? - correct answer - 100 times higher
25. High pH wastewater is neutralized by adding: - correct answer - H2SO4.
CWEA ENVIRONMENTAL COMPLIANCE EXAM 2025| BRAND
NEW ACTUAL EXAM WITH 100% VERIFIED QUESTIONS AND
CORRECT SOLUTIONS| GUARANTEED VALUE PACK| ACE
YOUR GRADES.
1. An industry operating an 8-hour shift, 5 days per week, generates 100,000 gallons of
wastewater per shift. Their pretreatment system has a capacity of 150 gallons per
minute. How long must the pretreatment facility operate to process the wastewater
generated each day? - correct answer - 11.1 hours
2. An industry has five sewer connections with the following discharge rates: 1) 300
gpd, 2) 75 gpd, 3) 725 gpd, 4) 1,200 gpd, 5) 200 gpd A flow-weighted composite
sample of 5 liters is desired. How many milliliters of sample from each connection
should be composited? - correct answer - 600, 150, 1450, 2400, 400
3. Prohibited discharges from industrial users to POTWs, as stipulated in the Clean
Water Act, are pollutants that: - correct answer - create a fire or explosion hazard in
the sewer or POTW.
4. "MSDS" is an acronym for what? - correct answer - Material Safety Data Sheet
5. Safety hazards associated with hydrogen sulfide in sewer systems include: - correct
answer - toxic gasses.
, Page |2
6. A significant industrial user can be defined as: - correct answer - a federal
categorical industrial user.
7. Lead acetate paper is used to determine the presence of: - correct answer -
hydrogen sulfide.
8. What is the average detention time, in minutes, for a 40,000 gpd flow going through
a 1,500-gallon interceptor? - correct answer - 54 minutes
9. The following type of flow measuring device can be installed in a pipe flowing full: -
correct answer - Venturi.
10. What total volume of spill containment capacity in gallons is needed for the following
tanks if a 12-inch rainfall occurs during a 24-hour period on a common 200-foot by
200-foot spill-containment pad? Assume 100 percent containment of all tank
capacity is needed. Tank I: Cube, 6 ft wide, 6 ft long, and 6 ft high. Tank II:
Rectangular, 4 ft wide, 20 ft long, and 3 ft high. Tank III: Cylindrical, 8 ft in diameter
and 9 ft high. - correct answer - 305,992 gallons
11. An industry has a wastewater discharge of 10,000 gallons per day containing 5 mg/L
of copper. What is the industry's mass emission rate of copper in pounds per day? -
correct answer - 0.42 lb/day
, Page |3
12. What kind of container and preservative is required for samples to be analyzed for
oil and grease? - correct answer - Glass, Cool 4°C, H2SO4 to pH<2
13. A chain-of-custody form: - correct answer - is the ability to trace sample possession
and handling from collection through analysis.
14. The BOD determination is an empirical test in which standardized laboratory
procedures are used to: - correct answer - determine the relative oxygen
requirements of wastewaters, effluents, and polluted waters.
15. A confined space is one that: - correct answer - is large enough to enter and work in,
has a restricted entry/exit, and is not meant for continuous occupancy.
16. Industrial plants producing wastes with a high suspended solids content include: -
correct answer - breweries.
17. Whenever an inspector or sampling technician is in a manhole, how many people
should there be above to respond in the event of an emergency? - correct answer -
Two
18. Alkalinity is reported as: - correct answer - alkalinity, mg/L CaCO3.
, Page |4
19. What is the normality of sodium hydroxide (NaOH) solution of 25 mL if a 0.01 N
sulfuric acid solution neutralizes 100 mL of the NaOH solution? - correct answer -
0.0025 N
20. A major pollutant of concern from a printed circuit board shop is: - correct answer -
copper.
21. To find the proper protective gear to use while inspecting an area where a
hazardous chemical is used, you would: - correct answer - check the MSDS for
chemicals used.
22. Why are gasoline and volatile solvents objectionable when present in a sewer? -
correct answer - They can produce an explosion hazard.
23. When inspecting a plating shop, personal protective equipment would include: -
correct answer - eye goggles or face shield, chemical resistant gloves, and overalls.
24. 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? - correct answer - 100 times higher
25. High pH wastewater is neutralized by adding: - correct answer - H2SO4.
