Page | 1
CWEA COLLECTION SYSTEMS
MAINTENANCE EXAM 2026
QUESTIONS AND ANSWERS | A+
GRADED | WITH EXPERT SOLUTIONS
Why are gasoline and volatile solvents objectionable when
present in a sewer? - correct answer-They produce an explosion
hazard
You should never attempt to install, maintain, repair or replace
electrical equipment panels, controls, wiring or circuits unless -
correct answer-You know what you are doing, are qualified and
are authorized
What are the different areas of traffic zones? - correct answer-
Advance Warning Area, Transition Area, 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? - correct answer-to
protect from corrosion and odors
, Page | 2
Personnel entering a Permit Required Confined Space must have
the following training - correct answer-entry and rescue
To find protective gear before application of a product, you
should: - correct answer-look at the MSDS
The gas most commonly associated with septic wastewater is -
correct 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
present because: - correct answer-some dangerous gasses are
odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? -
correct answer-combustible gas, adequate oxygen, heat and
proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? - correct
answer-It moves traffic out of its normal path
, Page | 3
what elements should be considered to improve worker safety in
High speed Temporary Traffic control Zones? - correct answer-
Rerouting traffic around the work site, positioning of law
enforcement officers in the temporary traffic control zone, and
work zone training
What key features would you need to address when developing
an S.O.P. for a Lift Station failure? - correct answer-Traffic Control
Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder? - correct answer-Spring
Blades
Tools used for sewer rodding include: - correct answer-porcupine,
root saw, square bar cork screw
What tool would you use to cut VCP pipe? - correct answer-Chain
Pipe Cutter
CWEA COLLECTION SYSTEMS
MAINTENANCE EXAM 2026
QUESTIONS AND ANSWERS | A+
GRADED | WITH EXPERT SOLUTIONS
Why are gasoline and volatile solvents objectionable when
present in a sewer? - correct answer-They produce an explosion
hazard
You should never attempt to install, maintain, repair or replace
electrical equipment panels, controls, wiring or circuits unless -
correct answer-You know what you are doing, are qualified and
are authorized
What are the different areas of traffic zones? - correct answer-
Advance Warning Area, Transition Area, 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? - correct answer-to
protect from corrosion and odors
, Page | 2
Personnel entering a Permit Required Confined Space must have
the following training - correct answer-entry and rescue
To find protective gear before application of a product, you
should: - correct answer-look at the MSDS
The gas most commonly associated with septic wastewater is -
correct 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
present because: - correct answer-some dangerous gasses are
odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? -
correct answer-combustible gas, adequate oxygen, heat and
proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? - correct
answer-It moves traffic out of its normal path
, Page | 3
what elements should be considered to improve worker safety in
High speed Temporary Traffic control Zones? - correct answer-
Rerouting traffic around the work site, positioning of law
enforcement officers in the temporary traffic control zone, and
work zone training
What key features would you need to address when developing
an S.O.P. for a Lift Station failure? - correct answer-Traffic Control
Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder? - correct answer-Spring
Blades
Tools used for sewer rodding include: - correct answer-porcupine,
root saw, square bar cork screw
What tool would you use to cut VCP pipe? - correct answer-Chain
Pipe Cutter
