Page |1
CWEA Collection Systems Maintenance
Questions and Correct Answers/ Latest
Update / Already Graded
Why are gasoline and volatile solvents objectionable when present in a
sewer?
Ans: They produce an explosion hazard
You should never attempt to install, maintain, repair or replace
electrical equipment panels, controls, wiring or circuits unless
Ans: You know what you are doing, are qualified and are
authorized
What are the different areas of traffic zones?
Ans: 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?
Ans: to protect from corrosion and odors
All rights reserved © 2025/ 2026 |
, Page |2
Personnel entering a Permit Required Confined Space must have the
following training
Ans: entry and rescue
To find protective gear before application of a product, you should:
Ans: look at the MSDS
The gas most commonly associated with septic wastewater is
Ans: 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:
Ans: some dangerous gasses are odorless (for example, carbon
monoxide)
What are the four conditions necessary to create an explosion?
Ans: combustible gas, adequate oxygen, heat and proper
mixing of gas and oxygen
what does the "transition area" mean in traffic control?
All rights reserved © 2025/ 2026 |
, Page |3
Ans: It moves traffic out of its normal path
what elements should be considered to improve worker safety in High
speed Temporary Traffic control Zones?
Ans: Rerouting traffic around the work site, positioning of law
enforcement officers in the temporary traffic contr ol zone, and
work zone training
What key features would you need to address when developing an
S.O.P. for a Lift Station failure?
Ans: Traffic Control Plan, By-Pass connections, and Spill
containment
What tools are used with a power rodder?
Ans: Spring Blades
Tools used for sewer rodding include:
Ans: porcupine, root saw, square bar cork screw
What tool would you use to cut VCP pipe?
Ans: Chain Pipe Cutter
All rights reserved © 2025/ 2026 |
CWEA Collection Systems Maintenance
Questions and Correct Answers/ Latest
Update / Already Graded
Why are gasoline and volatile solvents objectionable when present in a
sewer?
Ans: They produce an explosion hazard
You should never attempt to install, maintain, repair or replace
electrical equipment panels, controls, wiring or circuits unless
Ans: You know what you are doing, are qualified and are
authorized
What are the different areas of traffic zones?
Ans: 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?
Ans: to protect from corrosion and odors
All rights reserved © 2025/ 2026 |
, Page |2
Personnel entering a Permit Required Confined Space must have the
following training
Ans: entry and rescue
To find protective gear before application of a product, you should:
Ans: look at the MSDS
The gas most commonly associated with septic wastewater is
Ans: 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:
Ans: some dangerous gasses are odorless (for example, carbon
monoxide)
What are the four conditions necessary to create an explosion?
Ans: combustible gas, adequate oxygen, heat and proper
mixing of gas and oxygen
what does the "transition area" mean in traffic control?
All rights reserved © 2025/ 2026 |
, Page |3
Ans: It moves traffic out of its normal path
what elements should be considered to improve worker safety in High
speed Temporary Traffic control Zones?
Ans: Rerouting traffic around the work site, positioning of law
enforcement officers in the temporary traffic contr ol zone, and
work zone training
What key features would you need to address when developing an
S.O.P. for a Lift Station failure?
Ans: Traffic Control Plan, By-Pass connections, and Spill
containment
What tools are used with a power rodder?
Ans: Spring Blades
Tools used for sewer rodding include:
Ans: porcupine, root saw, square bar cork screw
What tool would you use to cut VCP pipe?
Ans: Chain Pipe Cutter
All rights reserved © 2025/ 2026 |
