CWEA Collection Systems Maintenance Exam Questions With Correct Answers

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