Water Distribution Level
2 .......Questions & Answers Solved
Correctly
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
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
2 .......Questions & Answers Solved
Correctly
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
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
