Water Treatment Exam Preparation Grade 2
Complete Questions and Guide Answers
100% Verified Graded A+
1. 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
2. Water systems that collect less than coliform samples each month can have 1
positive sample and remain in compliance.
Answer: 40
3. The maximum contaminant level for bromate is mg/L.
Answer: 0.010 mg/L
4. Water systems must provide at least removal or inactivation of Giardia
lamblia cysts between a point where the raw water is not subject to recontam- ination
by surface water runoff and a point downstream before or at the first customer.
Answer: 3-log
, 5. is the best available technology for removing radium-226 and
radium-228 from a water supply.
Answer: Lime softening
6. Color gives the water an unappealing appearance and indicates that
may be present.
Answer: dissolved organics
7. 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 sur- face
water runoff and a point downstream before or at the first customer.
Answer: 4-log
8. For water systems using conventional treatment or direct filtration, the tur- bidity
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
9. 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
Complete Questions and Guide Answers
100% Verified Graded A+
1. 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
2. Water systems that collect less than coliform samples each month can have 1
positive sample and remain in compliance.
Answer: 40
3. The maximum contaminant level for bromate is mg/L.
Answer: 0.010 mg/L
4. Water systems must provide at least removal or inactivation of Giardia
lamblia cysts between a point where the raw water is not subject to recontam- ination
by surface water runoff and a point downstream before or at the first customer.
Answer: 3-log
, 5. is the best available technology for removing radium-226 and
radium-228 from a water supply.
Answer: Lime softening
6. Color gives the water an unappealing appearance and indicates that
may be present.
Answer: dissolved organics
7. 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 sur- face
water runoff and a point downstream before or at the first customer.
Answer: 4-log
8. For water systems using conventional treatment or direct filtration, the tur- bidity
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
9. 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
