CWEA Collection Systems Maintenance exam
with verified answers.
Why are gasoline and volatile solvents objectionable when present in a sewer?
~CORRECT ANSWER~They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless ~CORRECT
ANSWER~You know what you are doing, are qualified and are authorized
What are the different areas of traffic zones? ~CORRECT ANSWER~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 ANSWER~to protect
from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following
training ~CORRECT ANSWER~entry and rescue
To find protective gear before application of a product, you should: ~CORRECT
ANSWER~look at the MSDS
The gas most commonly associated with septic wastewater is ~CORRECT
ANSWER~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
ANSWER~some dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? ~CORRECT
ANSWER~combustible gas, adequate oxygen, heat and proper mixing of gas and
oxygen
what does the "transition area" mean in traffic control? ~CORRECT ANSWER~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 ANSWER~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 ANSWER~Traffic Control Plan, By-Pass
connections, and Spill containment
What tools are used with a power rodder? ~CORRECT ANSWER~Spring Blades
Tools used for sewer rodding include: ~CORRECT ANSWER~porcupine, root
saw, square bar cork screw
, What tool would you use to cut VCP pipe? ~CORRECT ANSWER~Chain Pipe
Cutter
Which conditions should a gas detection device test for? ~CORRECT
ANSWER~Hydrogen sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? ~CORRECT ANSWER~Lower
Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below:
~CORRECT ANSWER~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? ~CORRECT
ANSWER~The L.O.T.O Program
What does L.O.T.O. Stand for? ~CORRECT ANSWER~Lock out tag out
What document would you require to be referenced when developing an S.O.p.
for hazardous substace spill clean up? ~CORRECT ANSWER~M.S.D.S.
with verified answers.
Why are gasoline and volatile solvents objectionable when present in a sewer?
~CORRECT ANSWER~They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless ~CORRECT
ANSWER~You know what you are doing, are qualified and are authorized
What are the different areas of traffic zones? ~CORRECT ANSWER~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 ANSWER~to protect
from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following
training ~CORRECT ANSWER~entry and rescue
To find protective gear before application of a product, you should: ~CORRECT
ANSWER~look at the MSDS
The gas most commonly associated with septic wastewater is ~CORRECT
ANSWER~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
ANSWER~some dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? ~CORRECT
ANSWER~combustible gas, adequate oxygen, heat and proper mixing of gas and
oxygen
what does the "transition area" mean in traffic control? ~CORRECT ANSWER~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 ANSWER~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 ANSWER~Traffic Control Plan, By-Pass
connections, and Spill containment
What tools are used with a power rodder? ~CORRECT ANSWER~Spring Blades
Tools used for sewer rodding include: ~CORRECT ANSWER~porcupine, root
saw, square bar cork screw
, What tool would you use to cut VCP pipe? ~CORRECT ANSWER~Chain Pipe
Cutter
Which conditions should a gas detection device test for? ~CORRECT
ANSWER~Hydrogen sulfide, explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? ~CORRECT ANSWER~Lower
Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below:
~CORRECT ANSWER~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? ~CORRECT
ANSWER~The L.O.T.O Program
What does L.O.T.O. Stand for? ~CORRECT ANSWER~Lock out tag out
What document would you require to be referenced when developing an S.O.p.
for hazardous substace spill clean up? ~CORRECT ANSWER~M.S.D.S.
