CWEA Collection Systems Maintenance|Complete
Questions with 100% Correct Answers
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
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
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?
Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below:
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?
The L.O.T.O Program
What does L.O.T.O. Stand for?
Lock out tag out
What document would you require to be referenced when developing an S.O.p. for hazardous substace
spill clean up?
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?
Placement of the blower and a weather forecast
According to the State Water Resources Control Board Order No. 2006-003-DWQ, each enrollee must
develop and implement a system-specific:
SSMP (Sewer System Management Plan)
How long do you have to report a category 1 SSO?
2 hours
Questions with 100% Correct Answers
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
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
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?
Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below:
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?
The L.O.T.O Program
What does L.O.T.O. Stand for?
Lock out tag out
What document would you require to be referenced when developing an S.O.p. for hazardous substace
spill clean up?
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?
Placement of the blower and a weather forecast
According to the State Water Resources Control Board Order No. 2006-003-DWQ, each enrollee must
develop and implement a system-specific:
SSMP (Sewer System Management Plan)
How long do you have to report a category 1 SSO?
2 hours
