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Over pumping and depleting the aquifer - ANSWER-Intrusion of seawater into groundwater basins result from? What is stratification in lakes and reservoirs? - ANSWER-Formation of separate layers of temperature, plant life, or animal life What causes the elevation and slope of water tables and artesian pressure levels to change? - ANSWER-Seasonal variations in the supply of water How extensive should the treatment be for reclaimed water? - ANSWER-Depends on potential exposure to the public The water distribution system must have sufficient capacity to meet 3 qualifying factors throughout the system. - ANSWER-Max water demand plus firefighting requirements and maintain adequate pressure
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Over pumping and depleting the aquifer - ANSWER-Intrusion of seawater into groundwater basins result from? What is stratification in lakes and reservoirs? - ANSWER-Formation of separate layers of temperature, plant life, or animal life What causes the elevation and slope of water tables and artesian pressure levels to change? - ANSWER-Seasonal variations in the supply of water How extensive should the treatment be for reclaimed water? - ANSWER-Depends on potential exposure to the public The water distribution system must have sufficient capacity to meet 3 qualifying factors throughout the system. - ANSWER-Max water demand plus firefighting requirements and maintain adequate pressure What is one difference between primary and secondary drinking water regulations? - ANSWER-Primary regulations are mandatory limits while secondary regulations are guidelines Palatable water - ANSWER-Water at a desirable temperature that is free from objectionable tastes, odors, colors, and turbidity Contamination - ANSWER-One factor that may cause water quality degradation Groundwater takes longer to recover after contamination due to? - ANSWER-Slow water movement Two causes of backflow though a cross-connection? - ANSWER-Back pressure and backsiphonage Chloramines - ANSWER-Form of chlorine most effective against biofilms Careless operating procedures - ANSWER-Improperly constructed or poorly located blow offs or air release and vacuum relief valves Integrity of the coating - ANSWER-Influences the potential for corrosion in metal or asbestos pipe that is lined with asphalt or coal tar
At least twice a month - ANSWER-Reservoirs should be inspected Why are uncovered reservoirs often prohibited? - ANSWER-Subject to contamination from many sources What is an important aspect of a tank inspection and maintenance program? - ANSWER-Ensuring adequate turnover of water in the tank Why should an O&M program include exercising the valve? - ANSWER-To ensure proper setting and operation What is the responsibility of water treatment plant operators? - ANSWER-Produce safe and pleasant drinking water Operator certificate - ANSWER-Most states require someone to have to work as a water treatment plant operator Careless and negligence - ANSWER-Contributes to most treatment plant accidents One of the benefits of storing water in a distribution system - ANSWER-System flow and pressure are improved and stabilized, providing better service to customers in the area Clear well - ANSWER-Type of storage facility is used for filtered water from water treatment plants Elevated tanks - ANSWER-Maintains adequate and fairly uniform pressure to a service area Covered reservoirs - ANSWER-Reduce the possibility of contamination Surge arrestors - ANSWER-Controls unusual velocity changes Individual needs, type of terrain - ANSWER-Is how the location of a storage facility or tank is decided to be installed Advanced of surge control valves in water distribution system - ANSWER-Easy to fit into plant Large pumps, care, surges(water hammer), excessive, negative - ANSWER-When ______ are out on line or taken off line, _____ must be exercised so that _____ do not break pipes due to ______ pressure or collapse pipes due to _____ pressure. Distribution storage facility - ANSWER-To take care of daily demands and especially peak demands
What is one difference between primary and secondary drinking water regulations? - ANSWER-Primary regulations are mandatory limits while secondary regulations are guidelines Palatable water - ANSWER-Water at a desirable temperature that is free from objectionable tastes, odors, colors, and turbidity Contamination - ANSWER-One factor that may cause water quality degradation Groundwater takes longer to recover after contamination due to? - ANSWER-Slow water movement Two causes of backflow though a cross-connection? - ANSWER-Back pressure and backsiphonage Chloramines - ANSWER-Form of chlorine most effective against biofilms Careless operating procedures - ANSWER-Improperly constructed or poorly located blow offs or air release and vacuum relief valves Integrity of the coating - ANSWER-Influences the potential for corrosion in metal or asbestos pipe that is lined with asphalt or coal tar At least twice a month - ANSWER-Reservoirs should be inspected Why are uncovered reservoirs often prohibited? - ANSWER-Subject to contamination from many sources What is an important aspect of a tank inspection and maintenance program? - ANSWER-Ensuring adequate turnover of water in the tank Why should an O&M program include exercising the valve? - ANSWER-To ensure proper setting and operation What is the responsibility of water treatment plant operators? - ANSWER-Produce safe and pleasant drinking water Operator certificate - ANSWER-Most states require someone to have to work as a water treatment plant operator Careless and negligence - ANSWER-Contributes to most treatment plant accidents One of the benefits of storing water in a distribution system - ANSWER-System flow and pressure are improved and stabilized, providing better service to customers in the area
Clear well - ANSWER-Type of storage facility is used for filtered water from water treatment plants Elevated tanks - ANSWER-Maintains adequate and fairly uniform pressure to a service area Covered reservoirs - ANSWER-Reduce the possibility of contamination Surge arrestors - ANSWER-Controls unusual velocity changes Individual needs, type of terrain - ANSWER-Is how the location of a storage facility or tank is decided to be installed Advanced of surge control valves in water distribution system - ANSWER-Easy to fit into plant Large pumps, care, surges(water hammer), excessive, negative - ANSWER-When ______ are out on line or taken off line, _____ must be exercised so that _____ do not break pipes due to ______ pressure or collapse pipes due to _____ pressure. Distribution storage facility - ANSWER-To take care of daily demands and especially peak demands Water level drops - ANSWER-Change in water levels occurs during peak demand in distribution storage facilities 14,960 gal - ANSWER-2,000 cubic feet of water 22,019 gal - ANSWER-Circular water storage tank 25 feet in diameter with water 6 feet deep Impeller, Submerged - ANSWER-Centrifugal pumps can not operate unless the _____ is _____ in water. Turbidity units (TU) - ANSWER-Measures cloudiness of water Leaching, linings or coatings - ANSWER-Chemical water quality problems can be caused by the ______ of chemical from tank ___________. Low,depleted, excessive - ANSWER-In some areas where seasonal water demands become very _____ , the chlorine residual in a storage tank may become _______ due to _______ detention time. Preventive, predictive, corrective - ANSWER-Types of maintenance