CWEA Collection Systems Maintenance | 140 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
, CWEA Collection Systems Maintenance | 140 Questions
with 100% Correct Answers
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
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
, CWEA Collection Systems Maintenance | 140 Questions
with 100% Correct Answers
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
