D2 WATER DISTRIBUTION TEST QUESTIONS WITH CORRECT ANSWERS

D2WATERDISTRIBUTIONTESTQUESTIONS WITH b b b b b




CORRECT ANSWERS 2025 b b b




What is the primary purpose of the SDWA? -RCORRECT ANSWER - To
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create uniform national standards for drinking water quality
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WhosetsMaximumContaminants Levels(MCLs)? -RCORRECTANSWER-USEPA
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What are some of the duties of the EPA? - CORRECT ANSWER -
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Sets MCLs, delegatesenforcement of SDWAtostate agencies, providesgrant funds, monitorsstate activi ties,
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provides continued research
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What isstate primacy? -RCORRECT ANSWER -
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Givingthe authority to thestate to implement and enforce regulations
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True orFalse: State requirements must be at least as stringent as those set by USEPA - CORRECT
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ANSWER -True.
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A public water system is a system that supplies piped water for human consumption and that has at leas t
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service connections or serves or more persons for or more days of the year. - b b b b b b b b b b b b b b




CORRECT ANSWER -15, 25, 60 b b b b




What is annontransient, noncommunity public water system? Give an example ofone. - CORRECT
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ANSWER -
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Establishments with their own private water systems that serve an average of 25 persons that do not liv e at theb b b b b b b b b b b b b b b b b b b b




location, but the same people use the water for more than 6 months per year. Example: school or factory
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What is a transient, noncommunity public water system? Give an example of one. - CORRECT ANSWER -
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Establishments with own water system and serve at least 25 persons a day but these people only use th e water
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occasionally and for short periods of time. Example: Motel or Park
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What is a community public water system? Give an example of one. - CORRECT ANSWER -
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Establishments with their own water supply that serve more than 15 homes. Example: HOA, or municip al b b b b b b b b b b b b b b b b




water utilities
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, Which of the public water systems are required to only monitor for nitrate, nitrite, and microbiological c
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ontamination? - CORRECT ANSWER -transient, noncommunity
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What does the National Primary Drinking Water Regulations (NPDWRs) specify? - CORRECT ANSWER - MCLs or
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a treatment technique requirement forcontaminants that may be found in drinking water and could have an
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adverse health effect on humans
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What does the National Secondary Drinking Water Regulations (NPDWRs) specify? - CORRECT ANSWER -
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water contaminantsRthat may adversely affect aesthetic qualitiesof the water such as taste, odor or colo r
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When must anagency post a public notification? - CORRECT ANSWER -
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When the water system violates any of the operating, monitoring or reporting requirements or if they e xceed
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the MCL
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Lead and Copper Rule (LCR) - CORRECT ANSWER -
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Requires that samples be collected at customers taps after the water has remained undisturbed in the w ater
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piping for at least 6 hrs
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True orFalse: systemoperators are required toregularly collectandtestwatersamples. - CORRECT
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ANSWER -true
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True orFalse: Water quality cannot changeafter it enter the distributionsystem. - CORRECT ANSWER- false -
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blending, season, operational changes b b b




What are the 4 methods of collecting samples? - CORRECT ANSWER -
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Grabsample,composite sample, timecomposite sample,flow-proportionalcompositesample
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What is a grab sample? - CORRECT ANSWER -A single sample at a single location
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What is a composite sample? - CORRECT ANSWER -
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A series of grab samples at one place and at different times
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