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Water Distribution System 7th Edition (Operation and Maintenance) with Complete Solutions., Exams of Water Resources Planning and Management

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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2023/2024

Available from 12/01/2024

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Water Distribution System 7th Edition
(Operation and Maintenance) with
Complete Solutions.
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
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Download Water Distribution System 7th Edition (Operation and Maintenance) with Complete Solutions. and more Exams Water Resources Planning and Management in PDF only on Docsity!

Water Distribution System 7th Edition

(Operation and Maintenance) with

Complete Solutions.

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