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CWEA collection systems wastewater maintenance Grade 1 operator exam Grade 2 operator exam sewer system maintenance wastewater collections certification operator safety system troubleshooting CWEA exam prep practice questions

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CWEA Collection Systems Maintenance Practice Questions – Grade 1 & 2 | Exam Review Questions and Answers for Certification Preparation

Institution
Pest Applicator
Course
Pest applicator

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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


What does "LEL" mean on a gas detection meter?


Lower Explosive Limit


The oxygen level alarm normally goes off if oxygen levels are below:


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?


The L.O.T.O Program

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Institution
Pest applicator
Course
Pest applicator

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