CWEA ENVIRONMENTAL COMPLIANCE TEST
2026|REAL 300 QS&AS|100% SCORE RATE
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.
The following type of flow measuring device can be installed in a pipe flowing
full:
,ANSWER:-Venturi.
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).
Samples must be kept cool after collection (≤6°C) and packed with a sufficient
amount of ice.
A chain-of-custody form:
ANSWER:-is the ability to trace sample possession and handling from
collection through analysis.
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.
,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.
Industrial plants producing wastes with a high suspended solids content
include:
ANSWER:-breweries.
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
A major pollutant of concern from a printed circuit board shop is:
ANSWER:-copper.
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
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?
2026|REAL 300 QS&AS|100% SCORE RATE
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.
The following type of flow measuring device can be installed in a pipe flowing
full:
,ANSWER:-Venturi.
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).
Samples must be kept cool after collection (≤6°C) and packed with a sufficient
amount of ice.
A chain-of-custody form:
ANSWER:-is the ability to trace sample possession and handling from
collection through analysis.
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.
,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.
Industrial plants producing wastes with a high suspended solids content
include:
ANSWER:-breweries.
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
A major pollutant of concern from a printed circuit board shop is:
ANSWER:-copper.
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
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?
