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REHS Exam Ch. 12 Wastewater Questions and Complete Solutions Graded A+
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REHS Exam Ch. 12 Wastewater Questions and Complete Solutions Graded A+
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REHS Exam Ch. 12Wastewater
Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
, It is known that some pathogenic organisms will survive from less than ___ days(s) in heat to more
_____ in freezing most soil - Answer: 1-2 years
Trickling filters can remove 90-95% of the found soil, water, and wastewater.
bacteria
viruses
vibrio cholerae - Answer: all the above
Primary sedimentation can be remove found in soil, water and wastewater
50-90% of bacteria
30-50% of ascaris
80% of schistosomes
all of the above - Answer: all of the above
Chemical coagulation, flocculation, sedimentation, and filtration will remove nearly all bacteria, viruses,
protozoa, and helminths if supplemented by
a. desalination
b. chlorination
c. over 4 feet of loamy soil
d. all of the above - Answer: all of the above
Chlorination of untreated wastewater is typically NOT an effective treatment for:
a. Entamoeba histolytica cysts
b. giardia cysts
c. tapeworm eggs
d. all of the above - Answer: all of the above
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