Water Distribution: Practice Exam Answers and Questions, Exams of Agricultural engineering

Download Water Distribution: Practice Exam Answers and Questions and more Exams Agricultural engineering in PDF only on Docsity! Water Distribution Grade I - Practice Exam 2 Correct 100% Chlorine gas has a - ANSWER Greenish-yellow color To preserve & maintain a groundwater supply source, the operator must - ANSWER Develop a record keeping program of well production and water quality A groundwater storage tank - ANSWER Has a diameter greater than its height Water distribution system operators are responsible for - ANSWER (All are correct) -Keeping themselves prepared for the future -Ensuring a safe & pleasant drinking water is delivered to everyone's tap -Operating & maintaining water distribution system -Community health & well being A water distribution system operator may be expected to - ANSWER (All are correct) -Maintain storage tanks -Handle complaints -Lubricate pumps -Inspect distribution system Chlorine cylinders - ANSWER (All are correct) -Should be kept away from steam pipes -Can be handled safely -Contain a fusible metal safety plug -Should be moved with a protective cap in place Operational deficiencies causing water quality degradation include - ANSWER Ignoring installation of sewers close to water mains During water supply reservoir inspection, water quality should be observed for - ANSWER Turbidity THM stands for - ANSWER Trihalomethane Purpose(s) of flushing water distribution line - ANSWER Avoid taste & odder complaints Distribution systems are expected to deliver - ANSWER (All are correct) -Potable water -Sufficient water -Water of suitable quality -Adequate pressure Valves may be used in water distribution system to - ANSWER (All are correct) -Prevent back siphon -Provide air relief -Blow off water -Prevent backflow Primary reason for dry barrel fire hydrant use - ANSWER Keep hydrant from freezing Hydrogen sulfide gas smells like - ANSWER Rotten eggs Disease-causing bacteria are known as - ANSWER Pathogenic Fifty milligram per litter equals ________ parts per million - ANSWER 50 Primary health risk associated with (THMs) is - ANSWER Cancer Inorganic chemicals - ANSWER Do not contain carbon "DO" stands for - ANSWER Dissovled Oxygen The minimum pressure required in a water distribution system is - ANSWER 20 PSI Method(s) of minimizing water hammer - ANSWER Install a surge tank Affect(s) of over lubricating a horizontal centrifugal pump bearings - ANSWER May cause overheating & bearing failure Copper sulfate pentahydrate is - ANSWER An algaecide Thrust blocks are installed to - ANSWER Prevent pipe movement Water hammer can be minimized by - ANSWER Air release valves & surge tanks Safe procedure(s) for handling chlorine cylinders - ANSWER Move with a properly balanced hand truck The spoil pole is normally - ANSWER Placed between the trench and the road A good driver - ANSWER (All are correct) -Makes sure all light are operating properly -Is courteous to other drivers -Knows & observes all traffic regulations -Uses a seatbelt A well slab should - ANSWER Be sloped away from a well