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
