age 1 of 34
CWEA Collection Systems Maintenance EXAM STUDY
GUIDE 2025/2026 COMPLETE QUESTIONS BANK AND
CORRECT DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS <BRAND NEW VERSION>
Why are gasoline and volatile solvents objectionable when
present in a sewer? .......Answer.........They produce an explosion
hazard
You should never attempt to install, maintain, repair or replace
electrical equipment panels, controls, wiring or circuits unless
.......Answer.........You know what you are doing, are qualified
and are authorized
What are the different areas of traffic zones?
.......Answer.........Advance Warning Area, Transition Area,
,age 2 of 34
Activity Area (buffer space and work space), Termination Area.
Could be 4 or 5, justify your answer on the test!
why should hydrogen sulfide be controlled? .......Answer.........to
protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have
the following training .......Answer.........entry and rescue
To find protective gear before application of a product, you
should: .......Answer.........look at the MSDS
The gas most commonly associated with septic wastewater is
.......Answer.........Hydrogen Sulfide
The lack of an unpleasant odor in a manhole, lift station or other
structures does not always mean that dangerous gases are not
,age 3 of 34
present because: .......Answer.........some dangerous gasses are
odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion?
.......Answer.........combustible gas, adequate oxygen, heat and
proper mixing of gas and oxygen
what does the "transition area" mean in traffic control?
.......Answer.........It moves traffic out of its normal path
what elements should be considered to improve worker safety in
High speed Temporary Traffic control Zones?
.......Answer.........Rerouting traffic around the work site,
positioning of law enforcement officers in the temporary traffic
control zone, and work zone training
, age 4 of 34
What key features would you need to address when developing
an S.O.P. for a Lift Station failure? .......Answer.........Traffic
Control Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder?
.......Answer.........Spring Blades
Tools used for sewer rodding include: .......Answer.........porcupine,
root saw, square bar cork screw
What tool would you use to cut VCP pipe? .......Answer.........Chain
Pipe Cutter
Which conditions should a gas detection device test for?
.......Answer.........Hydrogen sulfide, explosive/flammable gases,
oxygen
CWEA Collection Systems Maintenance EXAM STUDY
GUIDE 2025/2026 COMPLETE QUESTIONS BANK AND
CORRECT DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS <BRAND NEW VERSION>
Why are gasoline and volatile solvents objectionable when
present in a sewer? .......Answer.........They produce an explosion
hazard
You should never attempt to install, maintain, repair or replace
electrical equipment panels, controls, wiring or circuits unless
.......Answer.........You know what you are doing, are qualified
and are authorized
What are the different areas of traffic zones?
.......Answer.........Advance Warning Area, Transition Area,
,age 2 of 34
Activity Area (buffer space and work space), Termination Area.
Could be 4 or 5, justify your answer on the test!
why should hydrogen sulfide be controlled? .......Answer.........to
protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have
the following training .......Answer.........entry and rescue
To find protective gear before application of a product, you
should: .......Answer.........look at the MSDS
The gas most commonly associated with septic wastewater is
.......Answer.........Hydrogen Sulfide
The lack of an unpleasant odor in a manhole, lift station or other
structures does not always mean that dangerous gases are not
,age 3 of 34
present because: .......Answer.........some dangerous gasses are
odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion?
.......Answer.........combustible gas, adequate oxygen, heat and
proper mixing of gas and oxygen
what does the "transition area" mean in traffic control?
.......Answer.........It moves traffic out of its normal path
what elements should be considered to improve worker safety in
High speed Temporary Traffic control Zones?
.......Answer.........Rerouting traffic around the work site,
positioning of law enforcement officers in the temporary traffic
control zone, and work zone training
, age 4 of 34
What key features would you need to address when developing
an S.O.P. for a Lift Station failure? .......Answer.........Traffic
Control Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder?
.......Answer.........Spring Blades
Tools used for sewer rodding include: .......Answer.........porcupine,
root saw, square bar cork screw
What tool would you use to cut VCP pipe? .......Answer.........Chain
Pipe Cutter
Which conditions should a gas detection device test for?
.......Answer.........Hydrogen sulfide, explosive/flammable gases,
oxygen
