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Water Treatment Exam Preparation Grade 2 Questions with
100% Verified Answers UPDATED!!!
____ 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. - ANSWER Iron and/or
Manganese
Water systems that collect less than _____ coliform samples
each month can have 1 positive sample and remain in
compliance. - ANSWER 40
The maximum contaminant level for bromate is _____ mg/L. -
ANSWER 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. -
ANSWER 3-log
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____ _______ is the best available technology for removing
radium-226 and radium-228 from a water supply. - ANSWER
Lime softening
Color gives the water an unappealing appearance and indicates
that _______ _______ may be present. - ANSWER 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. - ANSWER 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. - ANSWER
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
Water Treatment Exam Preparation Grade 2 Questions with
100% Verified Answers UPDATED!!!
____ 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. - ANSWER Iron and/or
Manganese
Water systems that collect less than _____ coliform samples
each month can have 1 positive sample and remain in
compliance. - ANSWER 40
The maximum contaminant level for bromate is _____ mg/L. -
ANSWER 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. -
ANSWER 3-log
, 2|Page
____ _______ is the best available technology for removing
radium-226 and radium-228 from a water supply. - ANSWER
Lime softening
Color gives the water an unappealing appearance and indicates
that _______ _______ may be present. - ANSWER 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. - ANSWER 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. - ANSWER
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
