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Disinfecting the Water Using Combined Disinfectants


Quiz Questions

1. Chlorine is the most commonly used disinfectant in the drinking water treatment industry.
True
False
2. Maximum Contaminant Level Goals (MCLGs) are non-enforceable health goals for public water systems.
True
False
3. _______________ represents the primary drinking water regulations related to microbiological contaminants.
Table 1-2
Table 1-3
4. Most disinfectants are strong oxidants and/or generate oxidants as byproducts (such as hydroxyl free radicals) that react with organic and inorganic compounds in water.
True
False
5. The high pH treatment during lime softening does not have any impact on chlorine, chloramines, and UV.
True
False
6. ______________________gives a summary of disinfectant properties.
Table 1-5
Table 1-6
7. Trihalomethanes (THMs), other halogenated organics, ozone DBPs, oxidation byproducts, and some disinfectant residuals present a health risk and must be limited in drinking waters.
True
False
8. The ________________________ used in a treatment system, with the primary objective of the disinfectant being to maintain the disinfection residual through the distribution system.
First disinfectant
Second disinfectant
9. High bromide ion is defined as concentrations exceeding 0.10 mg/L.
True
False
10. Figure 1-2 represents the _______________________________________________.
Flow Diagram to Narrow Selection of a New Primary Disinfectant
Flow Diagram to Narrow Selection of a New Secondary Disinfectant
11. Assimilable organic carbon concentration is produced when a strong oxidant (e.g., ozone) is used as primary disinfectant in the presence of high TOC water.
True
False
12. Primary Drinking Water Regulations Related to Disinfection Byproducts is represented in ______________.
Table 1-3
Table 1-4
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