CWEA Collection Systems Maintenance Questions With Correct Answers

Why are gasoline and volatile solvents objectionable when present in a sewer? - correct answers--They produce an explosion hazard You should never attempt to install, maintain, repair or replace electrical equipment panels, controls, wiring or circuits unless - correct answers--You know what you are doing, are qualified and are authorized What are the different areas of traffic zones? - correct answers--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 answers--to protect from corrosion and odors Personnel entering a Permit Required Confined Space must have the following training - correct answers--entry and rescue To find protective gear before application of a product, you should: - correct answers--look at the MSDS The gas most commonly associated with septic wastewater is - correct answers--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 answers--some dangerous gasses are odorless (for example, carbon monoxide) What are the four conditions necessary to create an explosion? - correct answers--combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen what does the "transition area" mean in traffic control? - correct answers--It moves traffic out of its normal path