CWEA Grade 1 and 2 Tests Collection Systems
Maintenance Questions with Detailed Verified
Answers
Why are gasoline and volatile solvents objectionable when present in a sewer? Ans:
They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless Ans: You know what you are doing, are
qualified and are authorized
What are the different areas of traffic zones? 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? Ans: to protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following training
Ans: entry and rescue
To find protective gear before application of a product, you should: Ans: look at the
MSDS
The gas most commonly associated with septic wastewater is 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: Ans: some dangerous
gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? Ans: combustible gas,
adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? 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? 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? Ans: Traffic Control Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder? Ans: Spring Blades
Tools used for sewer rodding include: Ans: porcupine, root saw, square bar cork
screw
What tool would you use to cut VCP pipe? Ans: Chain Pipe Cutter
Which conditions should a gas detection device test for? Ans: Hydrogen sulfide,
explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? Ans: Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below: Ans: 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? Ans: The L.O.T.O
Program
What does L.O.T.O. Stand for? Ans: Lock out tag out
What document would you require to be referenced when developing an S.O.p. for
hazardous substace spill clean up? Ans: 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? Ans: Placement of the blower and a weather forecast
© Get it right 2025 Getaway - Stuvia US All rights reserved
Maintenance Questions with Detailed Verified
Answers
Why are gasoline and volatile solvents objectionable when present in a sewer? Ans:
They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless Ans: You know what you are doing, are
qualified and are authorized
What are the different areas of traffic zones? 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? Ans: to protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following training
Ans: entry and rescue
To find protective gear before application of a product, you should: Ans: look at the
MSDS
The gas most commonly associated with septic wastewater is 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: Ans: some dangerous
gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? Ans: combustible gas,
adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? 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? 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? Ans: Traffic Control Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder? Ans: Spring Blades
Tools used for sewer rodding include: Ans: porcupine, root saw, square bar cork
screw
What tool would you use to cut VCP pipe? Ans: Chain Pipe Cutter
Which conditions should a gas detection device test for? Ans: Hydrogen sulfide,
explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? Ans: Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below: Ans: 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? Ans: The L.O.T.O
Program
What does L.O.T.O. Stand for? Ans: Lock out tag out
What document would you require to be referenced when developing an S.O.p. for
hazardous substace spill clean up? Ans: 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? Ans: Placement of the blower and a weather forecast
© Get it right 2025 Getaway - Stuvia US All rights reserved
