CWEA Collection Systems Maintenance (Practice Questions for CWEA Grade 1 and 2 Tests) with Complete Solutions

CWEA Collection Systems Maintenance (Practice Questions for CWEA Grade 1 and 2 Tests) with Complete SolutionsCWEA Collection Systems Maintenance (Practice Questions for CWEA Grade 1 and 2 Tests) with Complete SolutionsCWEA Collection Systems Maintenance (Practice Questions for CWEA Grade 1 and 2 Tests) with Complete Solutions 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