Water Distribution Grade I- Practice Exam 4 Correct 100%

The pH of 4 is - ANSWER An acid The preserve & maintain a groundwater supply source, the operator must - ANSWER Be careful not to overtax aquifers capability to supply water What chemical is contained in the Bac T bottles? - ANSWER Sodium Thiosulfate A standpipe - ANSWER Height is greater than its' diameter SDWA stands for - ANSWER Safe Drinking Water Act Water quality criteria important for a good municipal water supply - ANSWER Absence of toxic chemicals Uncovered reservoirs are subject to contamination from - ANSWER (All are correct) -Bathing -Atmospheric contamination -Birds -Fishing Water quality monitoring is done to - ANSWER (All are correct) -Help determine source of any contaminants reaching the system -Establish safety & supply palatability -Detect any changes in water quality between source and distribution system -Provide a record of water quality served Leaks from pipes may be detected by - ANSWER Direct observation Valves must be exercised at least once a - ANSWER Year Minimum distribution system desirable pressure is - ANSWER 35 PSI Water distribution mains are laid out in what types of systems? - ANSWER Grid Fire hydrants are often painted to indicate - ANSWER Flow What centrifugal pump component moves water? - ANSWER Impeller Beards or long sideburns prohibit an operator from safely - ANSWER Entering a confined space Centrifugal pump component installed on a pipe suction to hold prime - ANSWER Foot valve Surge tank purpose(s) - ANSWER Control water hammer Primary health risk associated with synthetic organic compounds (SOCs) - ANSWER Cancer If a centrifugal pump speed is increased, the flow will normally - ANSWER Increase Fire hydrants should be spaced no further than - ANSWER 500 ft apart An altitude valve - ANSWER Regulates storage tank water surface level Piston type pump discharge flow rate -