©THESTAR 2024/2025 ALL RIGHTS RESERVED 10:08PM.
Water Distribution Level 2 Exam Questions
And Answers 2025 Update.
What do water distribution system operators have the responsibility for? - Answer✔The health
and well-being of the community they serve
Frequently the water supplier tries to maintain specific minimum target __________________
throughput the distribution system. - Answer✔Water pressure (20 PSI minimum)
All trenches and excavations are unsafe until... - Answer✔Proper shoring, used, and back filled
Can the quality of water coming out of the consumers tap can be affected by what happens to
the water as it travels through the consumers own system? - Answer✔Yes
Biofilms will grow more easily on materials that supply... - Answer✔Nutrients
Operators should be required to follow a prepared _________ schedule and document the
work they do - Answer✔PM (preventative maintenance)
A lack of chlorine residual in a distribution system could indicate? - Answer✔The presence of
heavy contamination
What is necessary to do when a new well, pump, or screen is completed - Answer✔Disinfect
The chlorine injection should never be due to causing corrosion problems - Answer✔On the
intake side of the pump
What must be done before excavation can begin? - Answer✔Location of underground
installations (811 locates)
When must a confined space permit be renewed? - Answer✔each time someone leaves and re-
enters the confined space
What does nearly every area of a managers responsibilities require? - Answer✔Some type of
planning
The sooner you deal with a disciple problem... - Answer✔The better the outcome will be.
Who is responsible for peeve contamination of the public water system by backflow? -
Answer✔The water supplier
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 10:08PM.
A supervisor neglecting the safety hazards could be... - Answer✔Fined, sentenced to jail, barred
from working
What is the operators most important responsibility with regards to safety? -
Answer✔Following safety procedures
What is the main purpose of a water storage facility? - Answer✔To provide a sufficient amount
of water to average or equalize the daily demands
What is the purpose of surge tanks? - Answer✔To control water hammer
Why should all storage facilities be sampled regular? - Answer✔To determine the quality or the
water that enters and leaves the facility?
Why is backflow a concern for water distribution system operators? - Answer✔Flow from non
potable source could contaminate distribution system
Why can air because a problem in a water main? - Answer✔Air can collect and stop the flow of
water completely
What is a cross-connection? - Answer✔Unprotected connection between a drinking water
supply and a system NOT approved as safe.
What is back pressure? - Answer✔Backflow caused when the users water system pressure is
higher than the public system
Which type of corrosion-control inhibitor may stimulate bacterial growth? -
Answer✔Phosphate-based product
What is the main objective of distribution system maintenance? - Answer✔Provide maximum
continuous equipment service at the lowest possible cost.
What should be done immediately if there is any evidence that distribution system has been
tampered with by vandals or terrorists? - Answer✔Take facility out of service
What is an air gap separation device? - Answer✔A vertical empty space that separates a
drinking wanted supply from an unapproved water system
What information is available from a geographic information system (GIS) computer program? -
Answer✔Map with detailed information about the physical structures within geographic areas.
What is disinfection? - Answer✔Selective destruction or inactivation of pathogenic organisms
What happens when chlorine is added to water and the reaction of chlorine with organic and
inorganic materials stops? - Answer✔Chlorine demand has been satisfied
What is the chlorine dose? - Answer✔Chlorine demand plus chlorine residual
What is the one objective of a safety program? - Answer✔To prevent accidents
2
Water Distribution Level 2 Exam Questions
And Answers 2025 Update.
What do water distribution system operators have the responsibility for? - Answer✔The health
and well-being of the community they serve
Frequently the water supplier tries to maintain specific minimum target __________________
throughput the distribution system. - Answer✔Water pressure (20 PSI minimum)
All trenches and excavations are unsafe until... - Answer✔Proper shoring, used, and back filled
Can the quality of water coming out of the consumers tap can be affected by what happens to
the water as it travels through the consumers own system? - Answer✔Yes
Biofilms will grow more easily on materials that supply... - Answer✔Nutrients
Operators should be required to follow a prepared _________ schedule and document the
work they do - Answer✔PM (preventative maintenance)
A lack of chlorine residual in a distribution system could indicate? - Answer✔The presence of
heavy contamination
What is necessary to do when a new well, pump, or screen is completed - Answer✔Disinfect
The chlorine injection should never be due to causing corrosion problems - Answer✔On the
intake side of the pump
What must be done before excavation can begin? - Answer✔Location of underground
installations (811 locates)
When must a confined space permit be renewed? - Answer✔each time someone leaves and re-
enters the confined space
What does nearly every area of a managers responsibilities require? - Answer✔Some type of
planning
The sooner you deal with a disciple problem... - Answer✔The better the outcome will be.
Who is responsible for peeve contamination of the public water system by backflow? -
Answer✔The water supplier
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 10:08PM.
A supervisor neglecting the safety hazards could be... - Answer✔Fined, sentenced to jail, barred
from working
What is the operators most important responsibility with regards to safety? -
Answer✔Following safety procedures
What is the main purpose of a water storage facility? - Answer✔To provide a sufficient amount
of water to average or equalize the daily demands
What is the purpose of surge tanks? - Answer✔To control water hammer
Why should all storage facilities be sampled regular? - Answer✔To determine the quality or the
water that enters and leaves the facility?
Why is backflow a concern for water distribution system operators? - Answer✔Flow from non
potable source could contaminate distribution system
Why can air because a problem in a water main? - Answer✔Air can collect and stop the flow of
water completely
What is a cross-connection? - Answer✔Unprotected connection between a drinking water
supply and a system NOT approved as safe.
What is back pressure? - Answer✔Backflow caused when the users water system pressure is
higher than the public system
Which type of corrosion-control inhibitor may stimulate bacterial growth? -
Answer✔Phosphate-based product
What is the main objective of distribution system maintenance? - Answer✔Provide maximum
continuous equipment service at the lowest possible cost.
What should be done immediately if there is any evidence that distribution system has been
tampered with by vandals or terrorists? - Answer✔Take facility out of service
What is an air gap separation device? - Answer✔A vertical empty space that separates a
drinking wanted supply from an unapproved water system
What information is available from a geographic information system (GIS) computer program? -
Answer✔Map with detailed information about the physical structures within geographic areas.
What is disinfection? - Answer✔Selective destruction or inactivation of pathogenic organisms
What happens when chlorine is added to water and the reaction of chlorine with organic and
inorganic materials stops? - Answer✔Chlorine demand has been satisfied
What is the chlorine dose? - Answer✔Chlorine demand plus chlorine residual
What is the one objective of a safety program? - Answer✔To prevent accidents
2
