CWEA COLLECTION SYSTENS
MAINTENANCE GRADE 1 2026-2027
QUESTIONS AND ANSWERS GRADED A+
To find protective gear before application of a product, you should:
look at the MSDS
The gas most commonly associated with septic wastewater is
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:
some dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion?
combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control?
It moves traffic out of its normal path
,what elements should be considered to improve worker safety in High speed
Temporary Traffic control Zones?
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?
Traffic Control Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder?
Spring Blades
Tools used for sewer rodding include:
porcupine, root saw, square bar cork screw
Why are gasoline and volatile solvents objectionable when present in a sewer?
They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless
, You know what you are doing, are qualified and are authorized
What are the different areas of traffic zones?
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?
to protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following
training
entry and rescue
What tool would you use to cut VCP pipe?
Chain Pipe Cutter
Which conditions should a gas detection device test for?
Hydrogen sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter?
MAINTENANCE GRADE 1 2026-2027
QUESTIONS AND ANSWERS GRADED A+
To find protective gear before application of a product, you should:
look at the MSDS
The gas most commonly associated with septic wastewater is
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:
some dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion?
combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control?
It moves traffic out of its normal path
,what elements should be considered to improve worker safety in High speed
Temporary Traffic control Zones?
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?
Traffic Control Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder?
Spring Blades
Tools used for sewer rodding include:
porcupine, root saw, square bar cork screw
Why are gasoline and volatile solvents objectionable when present in a sewer?
They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless
, You know what you are doing, are qualified and are authorized
What are the different areas of traffic zones?
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?
to protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following
training
entry and rescue
What tool would you use to cut VCP pipe?
Chain Pipe Cutter
Which conditions should a gas detection device test for?
Hydrogen sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter?
