CWEA ENVIRONMENTAL COMPLIANCE EXAM QUESTIONS AND ANSWERS
1. Prohibited discharges from industrial users to POTWs, as
stipulated in the Clean Water Act, are pollutants that:: create a fire or
explosion hazard in the sewer or POTW.
2. "MSDS" is an acronym for what?: Material Safety Data Sheet
3. Safety hazards associated with hydrogen sulfide in sewer
systems include:-
: toxic gasses
4. Lead acetate paper is used to determine the presence of::
hydrogen sulfide.
5. The following type of flow measuring device can be installed
in a pipe flowing full:: Venturi.
6. What kind of container and preservative is required for
samples to be ana-lyzed for oil and grease?: 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). Samples must be kept cool after collection (6d°C) and packed with a
suflcient amount of ice.
7. A chain-of-custody form:: is the ability to trace sample possession and handling
from collection
,through analysis.
8. The BOD determination is an empirical test in which
standardized laboratory procedures are used to:: The BOD test measures
how much oxygen tiny water creatures need to break down the stutt 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.
9. A confined space is one that:: is large enough to enter and work in, has a
restricted entry/exit, and
is not meant for continuous occupancy.
10. Industrial plants producing wastes with a high suspended
solids content include:: breweries.
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?: Two
12. A major pollutant of concern from a printed circuit board
shop is:: copper.
13. To find the proper protective gear to use while inspecting
an area where a hazardous chemical is used, you would:: check the
MSDS for chemicals used.
14. Why are gasoline and volatile solvents objectionable when
present in a sewer?: They can produce an explosion hazard.
,15. When inspecting a plating shop, personal protective
equipment would include:: eye goggles or face shield, chemical resistant
gloves, and overalls.
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?: 100 times higher
17. High pH wastewater is neutralized by adding:: H2SO4 / sulfuric
acid
18. When working in the street, signs and cones are needed
when:: over half of the street is blocked.
19. What is the danger of asphyxiation set point for oxygen on
an atmospheric monitor?: 19.5 percent
20. A common technology to recover chemicals from rinse
water include:: ion exchange.
21. Is an essential part of any sampling quality control
methodology:: Proper cleaning techniques for sampling equipment
22. What are the types of stormwater pollution?: Sediment, BOD,
Nutrients
23. How often must Significant industrial users (SIUs) be
inspected?: Once a year
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?: 399 grams per liter
25. Sodium hydroxide is commonly referred to as:: caustic soda.
26. Which of the following does an ultrafiltration system
, remove from waste-water?: suspended solids.
27. Low pH wastewater is neutralized by adding:: Sodium hydroxide
NaOH
28. A POTW must retain Industrial User records for a minimum
of:: 3 years
29. The Federal Act that introduced the concept of cradle to
grave manifesting for hazardous waste products is:: Resource
Conservation and Recovery Act (RCRA).
30. Waste discharge regulations can be concentration- or mass-
based except for:: pH and temperature.
31. New Categorical Dischargers must submit a Baseline
Monitoring Report to the POTW control authority prior to the
planned commencement of discharge by at least:: 90 days
32. In a normally distributed population of sampling data, what
percent of the data points will fall within one standard deviation?: 68 -
The empirical rule, also known as
1. Prohibited discharges from industrial users to POTWs, as
stipulated in the Clean Water Act, are pollutants that:: create a fire or
explosion hazard in the sewer or POTW.
2. "MSDS" is an acronym for what?: Material Safety Data Sheet
3. Safety hazards associated with hydrogen sulfide in sewer
systems include:-
: toxic gasses
4. Lead acetate paper is used to determine the presence of::
hydrogen sulfide.
5. The following type of flow measuring device can be installed
in a pipe flowing full:: Venturi.
6. What kind of container and preservative is required for
samples to be ana-lyzed for oil and grease?: 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). Samples must be kept cool after collection (6d°C) and packed with a
suflcient amount of ice.
7. A chain-of-custody form:: is the ability to trace sample possession and handling
from collection
,through analysis.
8. The BOD determination is an empirical test in which
standardized laboratory procedures are used to:: The BOD test measures
how much oxygen tiny water creatures need to break down the stutt 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.
9. A confined space is one that:: is large enough to enter and work in, has a
restricted entry/exit, and
is not meant for continuous occupancy.
10. Industrial plants producing wastes with a high suspended
solids content include:: breweries.
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?: Two
12. A major pollutant of concern from a printed circuit board
shop is:: copper.
13. To find the proper protective gear to use while inspecting
an area where a hazardous chemical is used, you would:: check the
MSDS for chemicals used.
14. Why are gasoline and volatile solvents objectionable when
present in a sewer?: They can produce an explosion hazard.
,15. When inspecting a plating shop, personal protective
equipment would include:: eye goggles or face shield, chemical resistant
gloves, and overalls.
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?: 100 times higher
17. High pH wastewater is neutralized by adding:: H2SO4 / sulfuric
acid
18. When working in the street, signs and cones are needed
when:: over half of the street is blocked.
19. What is the danger of asphyxiation set point for oxygen on
an atmospheric monitor?: 19.5 percent
20. A common technology to recover chemicals from rinse
water include:: ion exchange.
21. Is an essential part of any sampling quality control
methodology:: Proper cleaning techniques for sampling equipment
22. What are the types of stormwater pollution?: Sediment, BOD,
Nutrients
23. How often must Significant industrial users (SIUs) be
inspected?: Once a year
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?: 399 grams per liter
25. Sodium hydroxide is commonly referred to as:: caustic soda.
26. Which of the following does an ultrafiltration system
, remove from waste-water?: suspended solids.
27. Low pH wastewater is neutralized by adding:: Sodium hydroxide
NaOH
28. A POTW must retain Industrial User records for a minimum
of:: 3 years
29. The Federal Act that introduced the concept of cradle to
grave manifesting for hazardous waste products is:: Resource
Conservation and Recovery Act (RCRA).
30. Waste discharge regulations can be concentration- or mass-
based except for:: pH and temperature.
31. New Categorical Dischargers must submit a Baseline
Monitoring Report to the POTW control authority prior to the
planned commencement of discharge by at least:: 90 days
32. In a normally distributed population of sampling data, what
percent of the data points will fall within one standard deviation?: 68 -
The empirical rule, also known as
