CWEA Collection Systems
Maintenance Exam Questions With
Correct Solutions
What are the components of a temporary traffic control? - ✔✔✔✔Traffic space that allows traffic to
pass by activity, temporary lanes with a 10' minimum width and a 5' clearance from the excavation, and
tapers that are used in the transition area and moves traffic out of its normal path.
What is the minimum length of a taper in a temporary traffic control setup? - ✔✔✔✔50'
How high do your traffic cones need to be if the speed limit around your work zone is 35 MPH? -
✔✔✔✔18". Cone height must be 18" if speed limit is 30 MPH or less and 28" if the speed limit is 45 MPH
or more
how many flaggers are REQUIRED to perform a basic flagging operation? - ✔✔✔✔one
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
Maintenance Exam Questions With
Correct Solutions
What are the components of a temporary traffic control? - ✔✔✔✔Traffic space that allows traffic to
pass by activity, temporary lanes with a 10' minimum width and a 5' clearance from the excavation, and
tapers that are used in the transition area and moves traffic out of its normal path.
What is the minimum length of a taper in a temporary traffic control setup? - ✔✔✔✔50'
How high do your traffic cones need to be if the speed limit around your work zone is 35 MPH? -
✔✔✔✔18". Cone height must be 18" if speed limit is 30 MPH or less and 28" if the speed limit is 45 MPH
or more
how many flaggers are REQUIRED to perform a basic flagging operation? - ✔✔✔✔one
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
