Water Treatment Exam Preparation Grade 2
questions and correct answers (verified
answers) q& a 2026 |instant download pdf
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
____ _______ 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
dioxide, which cannot be undetectable in more than _____% of
the samples each - answer......5%
questions and correct answers (verified
answers) q& a 2026 |instant download pdf
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
____ _______ 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
dioxide, which cannot be undetectable in more than _____% of
the samples each - answer......5%
