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Water Treatment Exam Preparation Grade 2 Exam
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Water Treatment Exam Preparation Grade 2 Exam
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Water Treatment Exam PreparationGrade 2 Exam 2024-2025
____ and/or _________ in a water supply can discolor laundry, cause a bad
taste in the water, and cause taste problems in beverages such as coffee
and tea. - -Iron and/or Manganese
-Water systems that collect less than _____ coliform samples each month
can have 1 positive sample and remain in compliance. - -40
-The maximum contaminant level for bromate is _____ mg/L. - -0.010 mg/L
-Water systems must provide at least _____ removal or inactivation of
Giardia lamblia cysts between a point where the raw water is not subject to
recontamination by surface water runoff and a point downstream before or
at the first customer. - -3-log
-____ _______ is the best available technology for removing radium-226 and
radium-228 from a water supply. - -Lime softening
-Color gives the water an unappealing appearance and indicates that _______
_______ may be present. - -dissolved organics
-Water systems must provide at least 4-log removal or inactivation of
viruses between a point where the raw water is not subject to
recontamination by surface water runoff and a point downstream before or
at the first customer. - -4-log
-For water systems using conventional treatment or direct filtration, the
turbidity level of representative samples of a system's filtered water must be
less than or equal to _____ NTU in at least 95% of the samples collected each
month. - -0.3
-A public water system that does not provide filtration must have a
disinfection concentration in the distribution system, measured as total
chlorine, combined chlorine, or chlorine dioxide, which cannot be
undetectable in more than _____% of the samples each - -5%
-Systems using diatomaceous earth filtration are required to have turbidity
levels _____ ntu in ____% of the measurements collected each month. - -≤1.0
ntu in 95%
, -Lab analysis of pH, turbidity, temperature, and residual disinfectant
concentrations must be performed by a person approved by the ______. - -
State
-Either the _____ or a _____ _______ certifies water treatment plant
laboratories for the measurement of total coliforms, fecal coliforms, and
heterotrophic plate counts. - -USEPA or a state agency
-The time from sample collection to initiation of the fecal coliform analysis
may not exceed _____ hours. - -8 hours
-Samples to be analyzed for total coliforms by the total coliform
Fermentation Technique, must be kept below _____ degrees Celsius during
transit. - -10 degrees Celsius
-Utilities collecting samples more frequently than annually for inorganic
contaminants determine MCL compliance by calculating a ______ ______
_______ at each compliance sample point. - -running annual average
-A Tier _ violation poses immediate risk to public health and requires a clear
notification to the public within __ ______ of learning of the violation. - -24
hours
-Water systems avoiding filtration of source water must show that the
turbidity of the source water immediately before the initial point of
disinfection has not exceeded __ NTU in __% of the samples analyzed in the
previous 6 months. - -5.0 NTU in 90%
-A Tier _ violation requires the water system to notify its customers as soon
as possible, but within 30 days of learning of the violation and continue
________ notifications as long as the violation persists. - -quarterly
-Solder or flux is considered lead free if it does not contain more than ___%
lead. - -0.2%
-A Tier _ violation requires the public water system to notify its customers
within 12 months of learning of the violation. This may be accomplished by
including the violation in the ________ _________ Report - -Consumer
Confidence
-Repeat samples for a positive coliform sample are required to be collected
within ____ hours. - -24 hours
-A water system is considered public if it has at least ____ service
connections or serves ____ or more persons ____ or more days each year. - --
15 service connections
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