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CWEA Wastewater Operations Fundamentals Exam
Practice Verified Questions And Correct Answers
(Verified Answers) Plus Rationale 2026/2027 Q&A|
Instant Download Pdf
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 elements should be considered to improve worker
safety in High speed Temporary Traffic control Zones? -
Answer-Rerouting traffic around the work site, positioning
,2|Page
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? - 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
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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
What document would you require to be referenced when
developing an S.O.p. for hazardous substace spill clean
up? - Answer-M.S.D.S.
in developing an S.O.P. for air monitoring in a Permit
Required Confined Space you would include what two
factors? - Answer-Placement of the blower and a weather
forecast
Why are gasoline and volatile solvents objectionable when
present in a sewer? - Answer-They produce an explosion
hazard
CWEA Wastewater Operations Fundamentals Exam
Practice Verified Questions And Correct Answers
(Verified Answers) Plus Rationale 2026/2027 Q&A|
Instant Download Pdf
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 elements should be considered to improve worker
safety in High speed Temporary Traffic control Zones? -
Answer-Rerouting traffic around the work site, positioning
,2|Page
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? - 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
, 3|Page
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
What document would you require to be referenced when
developing an S.O.p. for hazardous substace spill clean
up? - Answer-M.S.D.S.
in developing an S.O.P. for air monitoring in a Permit
Required Confined Space you would include what two
factors? - Answer-Placement of the blower and a weather
forecast
Why are gasoline and volatile solvents objectionable when
present in a sewer? - Answer-They produce an explosion
hazard
