CWEA Collection Systems Maintenance | 140 Questions with 100% Correct Answers

CWEA Collection Systems Maintenance | 140 Questions with 100% Correct 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