CWEA ENVIRONMENTAL COMPLIANCE Questions with Correct
Solutions
Question:
1. 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.
Question:
2. "MSDS" is an acronym for what?
Answer:
Material Safety Data Sheet
Question:
3. Safety hazards associated with hydrogen sulfide in sewer systems include:
Answer:
toxic gasses
Question:
4. Lead acetate paper is used to determine the presence of:
Answer:
hydrogen sulfide.
Question:
5. The following type of flow measuring device can be installed in a pipe flowing full:
Answer:
Venturi.
Question:
6. What kind of container and preservative is required for samples to be analyzed for oil and
grease?
Answer:
Glass is the best option. Plastic containers are more susceptible to oils and greases sticking to
the inside. If sample analysis is delayed, the sample must be preserved to a pH <2 with
hydrochloric (HCl) or sulfuric acid (H2SO4). d- Samples must be kept cool after collection (
6°C) and packed with a sufficient amount of ice.
,Question:
7. A chain-of-custody form:
Answer:
is the ability to trace sample possession and handling from collection through analysis.
Question:
8. The BOD determination is an empirical test in which standardized laboratory procedures
are used to:
Answer:
The BOD test measures how much oxygen tiny water creatures need to break down the stuff
that pollutes the water, like dead plants or waste from factories. If the water has a lot of this
pollution, these creatures will use up more oxygen to clean it up, which can make it harder
for fish and other animals to live in the water. If the water is cleaner, they won't need as
much oxygen.
Question:
9. A confined space is one that:
Answer:
is large enough to enter and work in, has a restricted entry/exit, and is not meant for
continuous occupancy.
Question:
10. Industrial plants producing wastes with a high suspended solids content include:
Answer:
breweries.
Question:
11. 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?
Answer:
Two
Question:
12. A major pollutant of concern from a printed circuit board shop is:
Answer:
copper.
,Question:
13. 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.
Question:
14. Why are gasoline and volatile solvents objectionable when present in a sewer?
Answer:
They can produce an explosion hazard.
Question:
15. When inspecting a plating shop, personal protective equipment would include:
Answer:
eye goggles or face shield, chemical resistant gloves, and overalls.
Question:
16. 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
Question:
17. High pH wastewater is neutralized by adding:
Answer:
H2SO4 / sulfuric acid
Question:
18. When working in the street, signs and cones are needed when:
Answer:
over half of the street is blocked.
Question:
19. What is the danger of asphyxiation set point for oxygen on an atmospheric monitor?
Answer:
19.5 percent
, Question:
20. A common technology to recover chemicals from rinse water include:
Answer:
ion exchange.
Question:
21. Is an essential part of any sampling quality control methodology:
Answer:
Proper cleaning techniques for sampling equipment
Question:
22. What are the types of stormwater pollution?
Answer:
Sediment, BOD, Nutrients
Question:
23. How often must Significant industrial users (SIUs) be inspected?
Answer:
Once a year
Question:
24. A solution of ferrous chloride used at a pretreatment facility contains 30 percent ferrous
chloride and has a density of 1.33 g/mL. How many grams of ferrous chloride are in one liter
of the solution?
Answer:
399 grams per liter
Question:
25. Sodium hydroxide is commonly referred to as:
Answer:
caustic soda.
Question:
26. Which of the following does an ultrafiltration system remove from wastewater?
Answer:
suspended solids.
Solutions
Question:
1. 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.
Question:
2. "MSDS" is an acronym for what?
Answer:
Material Safety Data Sheet
Question:
3. Safety hazards associated with hydrogen sulfide in sewer systems include:
Answer:
toxic gasses
Question:
4. Lead acetate paper is used to determine the presence of:
Answer:
hydrogen sulfide.
Question:
5. The following type of flow measuring device can be installed in a pipe flowing full:
Answer:
Venturi.
Question:
6. What kind of container and preservative is required for samples to be analyzed for oil and
grease?
Answer:
Glass is the best option. Plastic containers are more susceptible to oils and greases sticking to
the inside. If sample analysis is delayed, the sample must be preserved to a pH <2 with
hydrochloric (HCl) or sulfuric acid (H2SO4). d- Samples must be kept cool after collection (
6°C) and packed with a sufficient amount of ice.
,Question:
7. A chain-of-custody form:
Answer:
is the ability to trace sample possession and handling from collection through analysis.
Question:
8. The BOD determination is an empirical test in which standardized laboratory procedures
are used to:
Answer:
The BOD test measures how much oxygen tiny water creatures need to break down the stuff
that pollutes the water, like dead plants or waste from factories. If the water has a lot of this
pollution, these creatures will use up more oxygen to clean it up, which can make it harder
for fish and other animals to live in the water. If the water is cleaner, they won't need as
much oxygen.
Question:
9. A confined space is one that:
Answer:
is large enough to enter and work in, has a restricted entry/exit, and is not meant for
continuous occupancy.
Question:
10. Industrial plants producing wastes with a high suspended solids content include:
Answer:
breweries.
Question:
11. 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?
Answer:
Two
Question:
12. A major pollutant of concern from a printed circuit board shop is:
Answer:
copper.
,Question:
13. 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.
Question:
14. Why are gasoline and volatile solvents objectionable when present in a sewer?
Answer:
They can produce an explosion hazard.
Question:
15. When inspecting a plating shop, personal protective equipment would include:
Answer:
eye goggles or face shield, chemical resistant gloves, and overalls.
Question:
16. 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
Question:
17. High pH wastewater is neutralized by adding:
Answer:
H2SO4 / sulfuric acid
Question:
18. When working in the street, signs and cones are needed when:
Answer:
over half of the street is blocked.
Question:
19. What is the danger of asphyxiation set point for oxygen on an atmospheric monitor?
Answer:
19.5 percent
, Question:
20. A common technology to recover chemicals from rinse water include:
Answer:
ion exchange.
Question:
21. Is an essential part of any sampling quality control methodology:
Answer:
Proper cleaning techniques for sampling equipment
Question:
22. What are the types of stormwater pollution?
Answer:
Sediment, BOD, Nutrients
Question:
23. How often must Significant industrial users (SIUs) be inspected?
Answer:
Once a year
Question:
24. A solution of ferrous chloride used at a pretreatment facility contains 30 percent ferrous
chloride and has a density of 1.33 g/mL. How many grams of ferrous chloride are in one liter
of the solution?
Answer:
399 grams per liter
Question:
25. Sodium hydroxide is commonly referred to as:
Answer:
caustic soda.
Question:
26. Which of the following does an ultrafiltration system remove from wastewater?
Answer:
suspended solids.
