CWEA Collection Systems Maintenance
2025/2026 Exam Questions and Correct
Answers | New Update
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 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
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
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2025/2026 Exam Questions and Correct
Answers | New Update
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 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
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
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
