Water Distribution System 7th Edition Exam with verified
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detailed answers ||
Over pumping and depleting the aquifer - ✔✔Intrusion of seawater into groundwater
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basins result from? || ||
What is stratification in lakes and reservoirs? - ✔✔Formation of separate layers of
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temperature, plant life, or animal life || || || || ||
What causes the elevation and slope of water tables and artesian pressure levels to change? -
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✔✔Seasonal variations in the supply of water
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How extensive should the treatment be for reclaimed water? - ✔✔Depends on potential
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exposure to the public || || ||
The water distribution system must have sufficient capacity to meet 3 qualifying factors
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throughout the system. - ✔✔Max water demand plus firefighting requirements and
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maintain adequate pressure || ||
What is one difference between primary and secondary drinking water regulations? -
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✔✔Primary regulations are mandatory limits while secondary regulations are guidelines
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Palatable water - ✔✔Water at a desirable temperature that is free from objectionable tastes,
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odors, colors, and turbidity
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Contamination - ✔✔One factor that may cause water quality degradation || || || || || || || || ||
, Groundwater takes longer to recover after contamination due to? - ✔✔Slow water
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movement
Two causes of backflow though a cross-connection? - ✔✔Back pressure and backsiphonage
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Chloramines - ✔✔Form of chlorine most effective against biofilms || || || || || || || ||
Careless operating procedures - ✔✔Improperly constructed or poorly located blow offs or
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air release and vacuum relief valves
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Integrity of the coating - ✔✔Influences the potential for corrosion in metal or asbestos pipe
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that is lined with asphalt or coal tar
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At least twice a month - ✔✔Reservoirs should be inspected
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Why are uncovered reservoirs often prohibited? - ✔✔Subject to contamination from many
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sources
What is an important aspect of a tank inspection and maintenance program? - ✔✔Ensuring
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adequate turnover of water in the tank || || || || || ||
Why should an O&M program include exercising the valve? - ✔✔To ensure proper setting
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and operation
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What is the responsibility of water treatment plant operators? - ✔✔Produce safe and
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pleasant drinking water || ||
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detailed answers ||
Over pumping and depleting the aquifer - ✔✔Intrusion of seawater into groundwater
|| || || || || || || || || || || ||
basins result from? || ||
What is stratification in lakes and reservoirs? - ✔✔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? -
|| || || || || || || || || || || || || || ||
✔✔Seasonal variations in the supply of water
|| || || || || || ||
How extensive should the treatment be for reclaimed water? - ✔✔Depends on potential
|| || || || || || || || || || || || ||
exposure to the public || || ||
The water distribution system must have sufficient capacity to meet 3 qualifying factors
|| || || || || || || || || || || || ||
throughout the system. - ✔✔Max water demand plus firefighting requirements and
|| || || || || || || || || || ||
maintain adequate pressure || ||
What is one difference between primary and secondary drinking water regulations? -
|| || || || || || || || || || || ||
✔✔Primary regulations are mandatory limits while secondary regulations are guidelines
|| || || || || || || || ||
Palatable water - ✔✔Water at a desirable temperature that is free from objectionable tastes,
|| || || || || || || || || || || || || ||
odors, colors, and turbidity
|| || ||
Contamination - ✔✔One factor that may cause water quality degradation || || || || || || || || ||
, Groundwater takes longer to recover after contamination due to? - ✔✔Slow water
|| || || || || || || || || || || ||
movement
Two causes of backflow though a cross-connection? - ✔✔Back pressure and backsiphonage
|| || || || || || || || || || ||
Chloramines - ✔✔Form of chlorine most effective against biofilms || || || || || || || ||
Careless operating procedures - ✔✔Improperly constructed or poorly located blow offs or
|| || || || || || || || || || || ||
air release and vacuum relief valves
|| || || || ||
Integrity of the coating - ✔✔Influences the potential for corrosion in metal or asbestos pipe
|| || || || || || || || || || || || || || ||
that is lined with asphalt or coal tar
|| || || || || || ||
At least twice a month - ✔✔Reservoirs should be inspected
|| || || || || || || || ||
Why are uncovered reservoirs often prohibited? - ✔✔Subject to contamination from many
|| || || || || || || || || || || ||
sources
What is an important aspect of a tank inspection and maintenance program? - ✔✔Ensuring
|| || || || || || || || || || || || || ||
adequate turnover of water in the tank || || || || || ||
Why should an O&M program include exercising the valve? - ✔✔To ensure proper setting
|| || || || || || || || || || || || || ||
and operation
||
What is the responsibility of water treatment plant operators? - ✔✔Produce safe and
|| || || || || || || || || || || || ||
pleasant drinking water || ||
