. CWEA Collection Systems Maintenance –
Grade 1 & 2 Tests (2025/2026 Latest Exam
Prep) | Complete Study Guide & Verified
Practice Q&A
Why are gasoline and volatile solvents objectionable when present in a sewer? - correct
answerThey produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless - correct answerYou know what you are doing,
are qualified and are authorized
What are the different areas of traffic zones? - correct answerAdvance 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? - correct answerto protect from corrosion
and odors
Personnel entering a Permit Required Confined Space must have the following training
- correct answerentry and rescue
To find protective gear before application of a product, you should: - correct answerlook
at the MSDS
The gas most commonly associated with septic wastewater is - correct
answerHydrogen 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: - correct answersome
dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - correct
answercombustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? - correct answerIt moves traffic
out of its normal path
, what elements should be considered to improve worker safety in High speed Temporary
Traffic control Zones? - correct answerRerouting 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? - correct answerTraffic Control Plan, By-Pass connections, and Spill
containment
What tools are used with a power rodder? - correct answerSpring Blades
Tools used for sewer rodding include: - correct answerporcupine, root saw, square bar
cork screw
What tool would you use to cut VCP pipe? - correct answerChain Pipe Cutter
Which conditions should a gas detection device test for? - correct answerHydrogen
sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? - correct answerLower Explosive
Limit
The oxygen level alarm normally goes off if oxygen levels are below: - correct
answer19.5 percent
When developing an S.O.P. for scheduled maintenance of electrical equipment, what
program should be addressed as a primary safety guideline? - correct answerThe
L.O.T.O Program
What does L.O.T.O. Stand for? - correct answerLock out tag out
What document would you require to be referenced when developing an S.O.p. for
hazardous substace spill clean up? - correct answerM.S.D.S.
in developing an S.O.P. for air monitoring in a Permit Required Confined Space you
would include what two factors? - correct answerPlacement 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: - correct answerSSMP (Sewer
System Management Plan)
How long do you have to report a category 1 SSO? - correct answer2 hours
To report in the Statewide SSO Data-base California Integrated Water Quality System
(CIWQS) regarding the location of a Category 2 SSO, how must you report the
location? - correct answerUsing the GPS coordinates
Grade 1 & 2 Tests (2025/2026 Latest Exam
Prep) | Complete Study Guide & Verified
Practice Q&A
Why are gasoline and volatile solvents objectionable when present in a sewer? - correct
answerThey produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless - correct answerYou know what you are doing,
are qualified and are authorized
What are the different areas of traffic zones? - correct answerAdvance 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? - correct answerto protect from corrosion
and odors
Personnel entering a Permit Required Confined Space must have the following training
- correct answerentry and rescue
To find protective gear before application of a product, you should: - correct answerlook
at the MSDS
The gas most commonly associated with septic wastewater is - correct
answerHydrogen 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: - correct answersome
dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - correct
answercombustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? - correct answerIt moves traffic
out of its normal path
, what elements should be considered to improve worker safety in High speed Temporary
Traffic control Zones? - correct answerRerouting 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? - correct answerTraffic Control Plan, By-Pass connections, and Spill
containment
What tools are used with a power rodder? - correct answerSpring Blades
Tools used for sewer rodding include: - correct answerporcupine, root saw, square bar
cork screw
What tool would you use to cut VCP pipe? - correct answerChain Pipe Cutter
Which conditions should a gas detection device test for? - correct answerHydrogen
sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? - correct answerLower Explosive
Limit
The oxygen level alarm normally goes off if oxygen levels are below: - correct
answer19.5 percent
When developing an S.O.P. for scheduled maintenance of electrical equipment, what
program should be addressed as a primary safety guideline? - correct answerThe
L.O.T.O Program
What does L.O.T.O. Stand for? - correct answerLock out tag out
What document would you require to be referenced when developing an S.O.p. for
hazardous substace spill clean up? - correct answerM.S.D.S.
in developing an S.O.P. for air monitoring in a Permit Required Confined Space you
would include what two factors? - correct answerPlacement 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: - correct answerSSMP (Sewer
System Management Plan)
How long do you have to report a category 1 SSO? - correct answer2 hours
To report in the Statewide SSO Data-base California Integrated Water Quality System
(CIWQS) regarding the location of a Category 2 SSO, how must you report the
location? - correct answerUsing the GPS coordinates
