D2 water distribution test Questions
and Answers(RATED A+)
What is the primary purpose of the SDWA? - ANSWER-To create uniform national
standards for drinking water quality
Who sets Maximum Contaminants Levels (MCLs)? - ANSWER-USEPA
What are some of the duties of the EPA? - ANSWER-Sets MCLs, delegates
enforcement of SDWA to state agencies, provides grant funds, monitors state
activities, provides continued research
What is state primacy? - ANSWER-Giving the authority to the state to implement and
enforce regulations
True or False: State requirements must be at least as stringent as those set by
USEPA - ANSWER-True.
A public water system is a system that supplies piped water for human consumption
and that has at least ___ service connections or serves ___ or more persons for ___
or more days of the year. - ANSWER-15, 25, 60
What is an nontransient, noncommunity public water system? Give an example of
one. - ANSWER-Establishments with their own private water systems that serve an
average of 25 persons that do not live at the location, but the same people use the
water for more than 6 months per year. Example: school or factory
, What is a transient, noncommunity public water system? Give an example of one. -
ANSWER-Establishments with own water system and serve at least 25 persons a
day but these people only use the water occasionally and for short periods of time.
Example: Motel or Park
What is a community public water system? Give an example of one. - ANSWER-
Establishments with their own water supply that serve more than 15 homes.
Example: HOA, or municipal water utilities
Which of the public water systems are required to only monitor for nitrate, nitrite, and
microbiological contamination? - ANSWER-transient, noncommunity
What does the National Primary Drinking Water Regulations (NPDWRs) specify? -
ANSWER-MCLs or a treatment technique requirement for contaminants that may be
found in drinking water and could have an adverse health effect on humans
What does the National Secondary Drinking Water Regulations (NPDWRs) specify?
- ANSWER-water contaminants that may adversely affect aesthetic qualities of the
water such as taste, odor or color
When must an agency post a public notification? - ANSWER-When the water system
violates any of the operating, monitoring or reporting requirements or if they exceed
the MCL
Lead and Copper Rule (LCR) - ANSWER-Requires that samples be collected at
customers taps after the water has remained undisturbed in the water piping for at
least 6 hrs
True or False: system operators are required to regularly collect and test water
samples. - ANSWER-true
True or False: Water quality cannot change after it enter the distribution system. -
ANSWER-false -blending, season, operational changes
What are the 4 methods of collecting samples? - ANSWER-Grab sample, composite
sample, time composite sample, flow-proportional composite sample
What is a grab sample? - ANSWER-A single sample at a single location
What is a composite sample? - ANSWER-A series of grab samples at one place and
at different times
What is a time composite sample? - ANSWER-Equal volumes at regular intervals
What is a flow proportional composite sample? - ANSWER-Adjusting the sample
size proportional to the flow
How do you select a sample point? - ANSWER-As close to the main as possible
and Answers(RATED A+)
What is the primary purpose of the SDWA? - ANSWER-To create uniform national
standards for drinking water quality
Who sets Maximum Contaminants Levels (MCLs)? - ANSWER-USEPA
What are some of the duties of the EPA? - ANSWER-Sets MCLs, delegates
enforcement of SDWA to state agencies, provides grant funds, monitors state
activities, provides continued research
What is state primacy? - ANSWER-Giving the authority to the state to implement and
enforce regulations
True or False: State requirements must be at least as stringent as those set by
USEPA - ANSWER-True.
A public water system is a system that supplies piped water for human consumption
and that has at least ___ service connections or serves ___ or more persons for ___
or more days of the year. - ANSWER-15, 25, 60
What is an nontransient, noncommunity public water system? Give an example of
one. - ANSWER-Establishments with their own private water systems that serve an
average of 25 persons that do not live at the location, but the same people use the
water for more than 6 months per year. Example: school or factory
, What is a transient, noncommunity public water system? Give an example of one. -
ANSWER-Establishments with own water system and serve at least 25 persons a
day but these people only use the water occasionally and for short periods of time.
Example: Motel or Park
What is a community public water system? Give an example of one. - ANSWER-
Establishments with their own water supply that serve more than 15 homes.
Example: HOA, or municipal water utilities
Which of the public water systems are required to only monitor for nitrate, nitrite, and
microbiological contamination? - ANSWER-transient, noncommunity
What does the National Primary Drinking Water Regulations (NPDWRs) specify? -
ANSWER-MCLs or a treatment technique requirement for contaminants that may be
found in drinking water and could have an adverse health effect on humans
What does the National Secondary Drinking Water Regulations (NPDWRs) specify?
- ANSWER-water contaminants that may adversely affect aesthetic qualities of the
water such as taste, odor or color
When must an agency post a public notification? - ANSWER-When the water system
violates any of the operating, monitoring or reporting requirements or if they exceed
the MCL
Lead and Copper Rule (LCR) - ANSWER-Requires that samples be collected at
customers taps after the water has remained undisturbed in the water piping for at
least 6 hrs
True or False: system operators are required to regularly collect and test water
samples. - ANSWER-true
True or False: Water quality cannot change after it enter the distribution system. -
ANSWER-false -blending, season, operational changes
What are the 4 methods of collecting samples? - ANSWER-Grab sample, composite
sample, time composite sample, flow-proportional composite sample
What is a grab sample? - ANSWER-A single sample at a single location
What is a composite sample? - ANSWER-A series of grab samples at one place and
at different times
What is a time composite sample? - ANSWER-Equal volumes at regular intervals
What is a flow proportional composite sample? - ANSWER-Adjusting the sample
size proportional to the flow
How do you select a sample point? - ANSWER-As close to the main as possible
