WATER TREATMENT EXAM PREPARATION GRADE 2 ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS

WATER TREATMENT EXAM PREPARATION GRADE 2 ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS ____ 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-logNeed assistance in Online classes, Exams & Assignments? Reach out for Full Course Assistance, Plagiarism-free Essay Writing, Research Paper & Discussion Posts. Confidential & Secure! Email now at: ____ _______ 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% Systems using diatomaceous earth filtrati