CWEA Grade 1 and 2 Tests Collection Systems
Maintenance Exam Questions and Answers
(Verified Answers) (Latest Update 2026)
UPDATE!!
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
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, 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 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 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
What does "LEL" mean on a gas detection meter? -
✔✔ANSWER ✔✔-Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are
below: - ✔✔ANSWER ✔✔-19.5 percent
When developing an S.O.P. for scheduled maintenance of
electrical equipment, what program should be addressed as a
primary safety guideline? - ✔✔ANSWER ✔✔-The L.O.T.O
Program
What does L.O.T.O. Stand for? - ✔✔ANSWER ✔✔-Lock out tag
out
Maintenance Exam Questions and Answers
(Verified Answers) (Latest Update 2026)
UPDATE!!
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
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, 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 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 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
What does "LEL" mean on a gas detection meter? -
✔✔ANSWER ✔✔-Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are
below: - ✔✔ANSWER ✔✔-19.5 percent
When developing an S.O.P. for scheduled maintenance of
electrical equipment, what program should be addressed as a
primary safety guideline? - ✔✔ANSWER ✔✔-The L.O.T.O
Program
What does L.O.T.O. Stand for? - ✔✔ANSWER ✔✔-Lock out tag
out
