CWEA COLLECTION SYSTEMS MAINTENANCE EXAM
2024/ ACTUAL 150 EXAM QUESTIONS WITH CORRECT
DETAILED AND VERIFIED ANSWERS/ ALREADY
GRADED A+
Why are gasoline and volatile solvents objectionable when present in a sewer? -
CORRECT ANS:->: They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless - CORRECT ANS:->: You know what
you are doing, are qualified and are authorized
What are the different areas of traffic zones? - CORRECT ANS:->: 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? - CORRECT ANS:->: to protect from
corrosion and odors
Personnel entering a Permit Required Confined Space must have the following
training - CORRECT ANS:->: entry and rescue
,To find protective gear before application of a product, you should: - CORRECT
ANS:->: look at the MSDS
The gas most commonly associated with septic wastewater is - CORRECT ANS:-
>: 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: - CORRECT
ANS:->: some dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - CORRECT
ANS:->: combustible gas, adequate oxygen, heat and proper mixing of gas
and oxygen
what does the "transition area" mean in traffic control? - CORRECT ANS:->: It
moves traffic out of its normal path
what elements should be considered to improve worker safety in High speed
Temporary Traffic control Zones? - CORRECT ANS:->: 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? - CORRECT ANS:->: Traffic Control Plan, By-Pass connections,
and Spill containment
What tools are used with a power rodder? - CORRECT ANS:->: Spring Blades
Tools used for sewer rodding include: - CORRECT ANS:->: porcupine, root saw,
square bar cork screw
What tool would you use to cut VCP pipe? - CORRECT ANS:->: Chain Pipe Cutter
Which conditions should a gas detection device test for? - CORRECT ANS:->:
Hydrogen sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? - CORRECT ANS:->: Lower
Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below: - CORRECT
ANS:->: 19.5 percent
2024/ ACTUAL 150 EXAM QUESTIONS WITH CORRECT
DETAILED AND VERIFIED ANSWERS/ ALREADY
GRADED A+
Why are gasoline and volatile solvents objectionable when present in a sewer? -
CORRECT ANS:->: They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless - CORRECT ANS:->: You know what
you are doing, are qualified and are authorized
What are the different areas of traffic zones? - CORRECT ANS:->: 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? - CORRECT ANS:->: to protect from
corrosion and odors
Personnel entering a Permit Required Confined Space must have the following
training - CORRECT ANS:->: entry and rescue
,To find protective gear before application of a product, you should: - CORRECT
ANS:->: look at the MSDS
The gas most commonly associated with septic wastewater is - CORRECT ANS:-
>: 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: - CORRECT
ANS:->: some dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - CORRECT
ANS:->: combustible gas, adequate oxygen, heat and proper mixing of gas
and oxygen
what does the "transition area" mean in traffic control? - CORRECT ANS:->: It
moves traffic out of its normal path
what elements should be considered to improve worker safety in High speed
Temporary Traffic control Zones? - CORRECT ANS:->: 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? - CORRECT ANS:->: Traffic Control Plan, By-Pass connections,
and Spill containment
What tools are used with a power rodder? - CORRECT ANS:->: Spring Blades
Tools used for sewer rodding include: - CORRECT ANS:->: porcupine, root saw,
square bar cork screw
What tool would you use to cut VCP pipe? - CORRECT ANS:->: Chain Pipe Cutter
Which conditions should a gas detection device test for? - CORRECT ANS:->:
Hydrogen sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? - CORRECT ANS:->: Lower
Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below: - CORRECT
ANS:->: 19.5 percent
