CWEA Collection Systems Maintenance Exam
Why are gasoline and volatile solvents objectionable They produce an explosion hazard
when present in a sewer?
You should never attempt to install, maintain, repair or You know what you are doing, are qualified and are authorized
replace electrical equipment panels, controls, wiring or
circuits unless
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 entry and rescue
must have the following training
To find protective gear before application of a product, look at the MSDS
you should:
The gas most commonly associated with septic Hydrogen Sulfide
wastewater is
The lack of an unpleasant odor in a manhole, lift station some dangerous gasses are odorless (for example, carbon monoxide)
or other structures does not always mean that dangerous
gases are not present because:
What are the four conditions necessary to create an combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
explosion?
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 Rerouting traffic around the work site, positioning of law enforcement officers in
safety in High speed Temporary Traffic control Zones? the temporary traffic control zone, and work zone training
What key features would you need to address when Traffic Control Plan, By-Pass connections, and Spill containment
developing an S.O.P. for a Lift Station failure?
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
, CWEA Collection Systems Maintenance Exam
What does "LEL" mean on a gas detection meter? Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen 19.5 percent
levels are below:
When developing an S.O.P. for scheduled maintenance The L.O.T.O Program
of electrical equipment, what program should be
addressed as a primary safety guideline?
What does L.O.T.O. Stand for? Lock out tag out
What document would you require to be referenced M.S.D.S.
when developing an S.O.p. for hazardous substace spill
clean up?
in developing an S.O.P. for air monitoring in a Permit Placement of the blower and a weather forecast
Required Confined Space you would include what two
factors?
According to the State Water Resources Control Board SSMP (Sewer System Management Plan)
Order No. 2006-003-DWQ, each enrollee must develop
and implement a system-specific:
How long do you have to report a category 1 SSO? 2 hours
To report in the Statewide SSO Data-base California Using the GPS coordinates
Integrated Water Quality System (CIWQS) regarding the
location of a Category 2 SSO, how must you report the
location?
Biological activity in long, sluggish-flow, flat grade sewer odors
lines will likely cause:
Flatter sewer line grades may cause added sewer A decrease in velocity which allows organic and inorganic solids to settle out.
maintenance expense and odor nuisance. This is caused This, in turn, allows biological activity to happen which corrodes the pipe and
by what? releases hydrogen sulfide (H2S) which smells like rotten eggs
Clear water in entering a collection system is called infiltration
what?
Infiltration can occur in a pipe when the pipe is: cracked, broken, fractures, has roots coming into it etc.
The main reason we add sodium hypochlorite to sewers BOD
is to control:
Roots can enter collection systems through: cracked pipes, broken pipes, fractured pipes
The lowest point on the inside of a pipe is called what? the invert
Why are gasoline and volatile solvents objectionable They produce an explosion hazard
when present in a sewer?
You should never attempt to install, maintain, repair or You know what you are doing, are qualified and are authorized
replace electrical equipment panels, controls, wiring or
circuits unless
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 entry and rescue
must have the following training
To find protective gear before application of a product, look at the MSDS
you should:
The gas most commonly associated with septic Hydrogen Sulfide
wastewater is
The lack of an unpleasant odor in a manhole, lift station some dangerous gasses are odorless (for example, carbon monoxide)
or other structures does not always mean that dangerous
gases are not present because:
What are the four conditions necessary to create an combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
explosion?
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 Rerouting traffic around the work site, positioning of law enforcement officers in
safety in High speed Temporary Traffic control Zones? the temporary traffic control zone, and work zone training
What key features would you need to address when Traffic Control Plan, By-Pass connections, and Spill containment
developing an S.O.P. for a Lift Station failure?
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
, CWEA Collection Systems Maintenance Exam
What does "LEL" mean on a gas detection meter? Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen 19.5 percent
levels are below:
When developing an S.O.P. for scheduled maintenance The L.O.T.O Program
of electrical equipment, what program should be
addressed as a primary safety guideline?
What does L.O.T.O. Stand for? Lock out tag out
What document would you require to be referenced M.S.D.S.
when developing an S.O.p. for hazardous substace spill
clean up?
in developing an S.O.P. for air monitoring in a Permit Placement of the blower and a weather forecast
Required Confined Space you would include what two
factors?
According to the State Water Resources Control Board SSMP (Sewer System Management Plan)
Order No. 2006-003-DWQ, each enrollee must develop
and implement a system-specific:
How long do you have to report a category 1 SSO? 2 hours
To report in the Statewide SSO Data-base California Using the GPS coordinates
Integrated Water Quality System (CIWQS) regarding the
location of a Category 2 SSO, how must you report the
location?
Biological activity in long, sluggish-flow, flat grade sewer odors
lines will likely cause:
Flatter sewer line grades may cause added sewer A decrease in velocity which allows organic and inorganic solids to settle out.
maintenance expense and odor nuisance. This is caused This, in turn, allows biological activity to happen which corrodes the pipe and
by what? releases hydrogen sulfide (H2S) which smells like rotten eggs
Clear water in entering a collection system is called infiltration
what?
Infiltration can occur in a pipe when the pipe is: cracked, broken, fractures, has roots coming into it etc.
The main reason we add sodium hypochlorite to sewers BOD
is to control:
Roots can enter collection systems through: cracked pipes, broken pipes, fractured pipes
The lowest point on the inside of a pipe is called what? the invert
