2025 D2 WATER DISTRIBUTION TEST
QUESTIONS WITH CORRECT ANSWERS
To create uniform national standards for drinking water quality - CORRECT ANSWER -
What is the primary purpose of the SWDA?
USEPA - CORRECT ANSWER -Who sets Maximum Contaminants Levels (MCLs)?
Sets MCLs, delegates enforcement of SDWA to state agencies, provides grant funds, monitors state activi
ties, provides continued research - CORRECT ANSWER -What are some of the duties of the EPA?
Giving the authority to the state to implement and enforce regulations -RCORRECT ANSWER -
What is state primacy?
True. - CORRECT ANSWER -
True or False: State requirements must be at least as stringent as those set by USEPA
15, 25, 60R- CORRECT ANSWER -
A public water system is a system that supplies piped water for human consumption and that has at leas
t service connections or serves or more persons for or more days of the year.
Establishments with their own private water systems that serve an average of 25 persons that do notRliv
e at the location, but the same people use the water for more than 6 monthsRper year. Example: school
or factory - CORRECT ANSWER -
What is an nontransient, noncommunity public water system? Give an example of one.
Establishments with own water system and serve at least 25 persons a day but these people only use th
e water occasionally and for short periods of time. Example: Motel or ParkR- CORRECT ANSWER -
What is a transient, noncommunity public water system? Give an example of one.
Establishments with their own water supply that serve more than 15 homes. Example: HOA, or municip
al water utilities - CORRECT ANSWER -
What is a community public water system? Give an example of one.
, transient, noncommunity - CORRECT ANSWER -
Which of the public water systems are required to only monitor for nitrate, nitrite, and microbiological c
ontamination?
MCLs or a treatment technique requirement for contaminants that may be found in drinking water and
could have an adverse health effect on humans - CORRECT ANSWER -
What does the National Primary Drinking Water Regulations (NPDWRs) specify?
water contaminants that may adversely affect aesthetic qualities of the water such as taste, odor or colo
r - CORRECT ANSWER -
What does the National Secondary Drinking Water Regulations (NPDWRs) specify?
When the water system violates any of the operating, monitoring or reporting requirements or if they e
xceed the MCL - CORRECT ANSWER -When must an agency post a public notification?
Requires that samples be collected at customers taps after the water has remained undisturbed in the w
ater piping for at least 6 hrs - CORRECT ANSWER -Lead and Copper Rule (LCR)
true - CORRECT ANSWER -
True or False: system operators are required to regularly collect and test water samples.
false -blending, season, operational changes - CORRECT ANSWER -
True or False: Water quality cannot change after it enter the distribution system.
Grab sample, composite sample, time composite sample, flow-proportional composite sample -
CORRECT ANSWER -What are the 4 methods of collecting samples?
A single sample at a single location -RCORRECT ANSWER -What is a grab sample?
A series of grab samples at one place and at different times - CORRECT ANSWER -
What is a composite sample?
Equal volumes at regular intervals - CORRECT ANSWER -What is a time composite sample?
QUESTIONS WITH CORRECT ANSWERS
To create uniform national standards for drinking water quality - CORRECT ANSWER -
What is the primary purpose of the SWDA?
USEPA - CORRECT ANSWER -Who sets Maximum Contaminants Levels (MCLs)?
Sets MCLs, delegates enforcement of SDWA to state agencies, provides grant funds, monitors state activi
ties, provides continued research - CORRECT ANSWER -What are some of the duties of the EPA?
Giving the authority to the state to implement and enforce regulations -RCORRECT ANSWER -
What is state primacy?
True. - CORRECT ANSWER -
True or False: State requirements must be at least as stringent as those set by USEPA
15, 25, 60R- CORRECT ANSWER -
A public water system is a system that supplies piped water for human consumption and that has at leas
t service connections or serves or more persons for or more days of the year.
Establishments with their own private water systems that serve an average of 25 persons that do notRliv
e at the location, but the same people use the water for more than 6 monthsRper year. Example: school
or factory - CORRECT ANSWER -
What is an nontransient, noncommunity public water system? Give an example of one.
Establishments with own water system and serve at least 25 persons a day but these people only use th
e water occasionally and for short periods of time. Example: Motel or ParkR- CORRECT ANSWER -
What is a transient, noncommunity public water system? Give an example of one.
Establishments with their own water supply that serve more than 15 homes. Example: HOA, or municip
al water utilities - CORRECT ANSWER -
What is a community public water system? Give an example of one.
, transient, noncommunity - CORRECT ANSWER -
Which of the public water systems are required to only monitor for nitrate, nitrite, and microbiological c
ontamination?
MCLs or a treatment technique requirement for contaminants that may be found in drinking water and
could have an adverse health effect on humans - CORRECT ANSWER -
What does the National Primary Drinking Water Regulations (NPDWRs) specify?
water contaminants that may adversely affect aesthetic qualities of the water such as taste, odor or colo
r - CORRECT ANSWER -
What does the National Secondary Drinking Water Regulations (NPDWRs) specify?
When the water system violates any of the operating, monitoring or reporting requirements or if they e
xceed the MCL - CORRECT ANSWER -When must an agency post a public notification?
Requires that samples be collected at customers taps after the water has remained undisturbed in the w
ater piping for at least 6 hrs - CORRECT ANSWER -Lead and Copper Rule (LCR)
true - CORRECT ANSWER -
True or False: system operators are required to regularly collect and test water samples.
false -blending, season, operational changes - CORRECT ANSWER -
True or False: Water quality cannot change after it enter the distribution system.
Grab sample, composite sample, time composite sample, flow-proportional composite sample -
CORRECT ANSWER -What are the 4 methods of collecting samples?
A single sample at a single location -RCORRECT ANSWER -What is a grab sample?
A series of grab samples at one place and at different times - CORRECT ANSWER -
What is a composite sample?
Equal volumes at regular intervals - CORRECT ANSWER -What is a time composite sample?
