d) 7 days 2. Treating drinking water can protect water consumers from pollutants
ID: 1732500 • Letter: D
Question
d) 7 days 2. Treating drinking water can protect water consumers from pollutants, including Giardia lambia and Cryptosporidium, which are examples of which pathogen? a) Viruses b) Bacteria c) Helminthes d) Protozoa 3. Testing for the broad diversity of pathogens is not feasible; instead, the presence of is used as an indicator organism when testing a water sample a) Hepatitis A b) Cryptosporidium c) Coliform bacteria d) Algae In addition to chlorine, NYC DEP uses which physical method of disinfection to treat New York City drinking water? a) Sodium hypochlorite b) Ozone c) Ultraviolet light d) Fluoride 4. 5. What is the recommended normal water pressure in a water supply distribution system? a) 40 psi b) 65 psi c) 90 psi d) 105 psi st unicalh design square tanks for?Explanation / Answer
2) d) protozoa
Giardia lamblia are protozoan parasites which cause human intestinal disease.
3) c) coliform bacteria
faecal contamination can be determined by this bacteria.
4) c) ultraviolent light
in 2003 first this process is used.
5) b) 65psi
pressures in the system under normal operating conditions should range between 50 and 80 psi. so we can take as 65psi.
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