Water distribution system operation and
maintenance Exam Questions With
100% Complete Solutions Rated A+
Intrusion of seawater into ground water basins results from __________ - CORRECT
ANSWER-Overpumping fresh water
What is stratification in lakes and reservoirs? - CORRECT 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? - CORRECT ANSWER-Seasonal variations in the water supply.
How extensive should the treatment be for reclaimed water? - CORRECT ANSWER-
Depends on potential exposure to the public.
The water distribution system must have sufficient capacity to meet __________ plus
___________ and __________ throughout the system. - CORRECT ANSWER-
Maximum water demands, firefighting requirements, maintain adequate pressures
What is one difference between primary and secondary drinking water regulations? -
CORRECT ANSWER-Primary regulations are mandatory limits while secondary
regulations are guidelines.
What is palatable water? - CORRECT ANSWER-Water at a desirable temperature that
is free from objectionable tastes, odors, colors and turbidity.
,Factors that may cause water quality degradation are ____________ - CORRECT
ANSWER-Cross connections, corrosion, biological growth and activity, high
temperature,unusual flows, time in system, dead ends, age of facilities or operational
procedures.
Once groundwaters are contaminated, it normally takes a considerable amount of time
before they recover because of _________ - CORRECT ANSWER-The slow movement
of water in the ground.
What are 2 causes of back flow through a cross connection? - CORRECT ANSWER-
Back pressure and back siphonage.
Which form of chlorine is most effective against biofilms? - CORRECT ANSWER-
Chloramines
Careless operating procedures that contribute to the degradation of water quality in a
distribution system include _______ - CORRECT ANSWER-Inadequate cross
connections controls, poorly performed water quality monitoring and flushing programs,
tolerance of low or negative pressures in system, insufficient surveillance of storage
facilities and mains, inadequate disinfection after repair or installation, disregard for
hazards of installing facilities in close proximity to water lines
What influences the potential for corrosion in metal or asbestos pipe that is lined with
asphalt or coal tar? - CORRECT ANSWER-Integrity of the coating
How often should reservoirs be inspected? - CORRECT ANSWER-At least 2 times per
month.
Why are uncovered reservoirs often prohibited? - CORRECT ANSWER-They are
subject to contamination from many sources.
, What is an important aspect of a tank inspection and maintenance program? -
CORRECT ANSWER-Ensuring adequate turnover of water in the tank.
Why should an O&M (operation and maintenance) program include exercising valves? -
CORRECT ANSWER-To ensure proper setting and operation.
What is the responsibility of water treatment plant operators? - CORRECT ANSWER-To
produce safe and pleasant drinking water.
What do most states require for someone to work as a water treatment plant operator? -
CORRECT ANSWER-An operator certificate or license.
What contributes to most treatment plant accidents? - CORRECT ANSWER-
Carelessness and negligence.
One of the benefits of storing water in a distribution system is that the system
__________ and __________ are improved and stabilized, providing better
____________ to customers. - CORRECT ANSWER-Flows, pressures , service
Which type of storage facility is used for filtered water from water treatment plants? -
CORRECT ANSWER-Clear well
What is the primary purpose of elevated tanks? - CORRECT ANSWER-To maintain
adequate and fairly uniform pressure to a service area.
Why should reservoirs be covered? - CORRECT ANSWER-To reduce the possibility of
contamination
How do surge arrestors protect piping systems from hydraulic transients? - CORRECT
ANSWER-By controlling unusual velocity changes
maintenance Exam Questions With
100% Complete Solutions Rated A+
Intrusion of seawater into ground water basins results from __________ - CORRECT
ANSWER-Overpumping fresh water
What is stratification in lakes and reservoirs? - CORRECT 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? - CORRECT ANSWER-Seasonal variations in the water supply.
How extensive should the treatment be for reclaimed water? - CORRECT ANSWER-
Depends on potential exposure to the public.
The water distribution system must have sufficient capacity to meet __________ plus
___________ and __________ throughout the system. - CORRECT ANSWER-
Maximum water demands, firefighting requirements, maintain adequate pressures
What is one difference between primary and secondary drinking water regulations? -
CORRECT ANSWER-Primary regulations are mandatory limits while secondary
regulations are guidelines.
What is palatable water? - CORRECT ANSWER-Water at a desirable temperature that
is free from objectionable tastes, odors, colors and turbidity.
,Factors that may cause water quality degradation are ____________ - CORRECT
ANSWER-Cross connections, corrosion, biological growth and activity, high
temperature,unusual flows, time in system, dead ends, age of facilities or operational
procedures.
Once groundwaters are contaminated, it normally takes a considerable amount of time
before they recover because of _________ - CORRECT ANSWER-The slow movement
of water in the ground.
What are 2 causes of back flow through a cross connection? - CORRECT ANSWER-
Back pressure and back siphonage.
Which form of chlorine is most effective against biofilms? - CORRECT ANSWER-
Chloramines
Careless operating procedures that contribute to the degradation of water quality in a
distribution system include _______ - CORRECT ANSWER-Inadequate cross
connections controls, poorly performed water quality monitoring and flushing programs,
tolerance of low or negative pressures in system, insufficient surveillance of storage
facilities and mains, inadequate disinfection after repair or installation, disregard for
hazards of installing facilities in close proximity to water lines
What influences the potential for corrosion in metal or asbestos pipe that is lined with
asphalt or coal tar? - CORRECT ANSWER-Integrity of the coating
How often should reservoirs be inspected? - CORRECT ANSWER-At least 2 times per
month.
Why are uncovered reservoirs often prohibited? - CORRECT ANSWER-They are
subject to contamination from many sources.
, What is an important aspect of a tank inspection and maintenance program? -
CORRECT ANSWER-Ensuring adequate turnover of water in the tank.
Why should an O&M (operation and maintenance) program include exercising valves? -
CORRECT ANSWER-To ensure proper setting and operation.
What is the responsibility of water treatment plant operators? - CORRECT ANSWER-To
produce safe and pleasant drinking water.
What do most states require for someone to work as a water treatment plant operator? -
CORRECT ANSWER-An operator certificate or license.
What contributes to most treatment plant accidents? - CORRECT ANSWER-
Carelessness and negligence.
One of the benefits of storing water in a distribution system is that the system
__________ and __________ are improved and stabilized, providing better
____________ to customers. - CORRECT ANSWER-Flows, pressures , service
Which type of storage facility is used for filtered water from water treatment plants? -
CORRECT ANSWER-Clear well
What is the primary purpose of elevated tanks? - CORRECT ANSWER-To maintain
adequate and fairly uniform pressure to a service area.
Why should reservoirs be covered? - CORRECT ANSWER-To reduce the possibility of
contamination
How do surge arrestors protect piping systems from hydraulic transients? - CORRECT
ANSWER-By controlling unusual velocity changes
