Water Treatment Class D (practice exam -4) Questions With 100- Correct Answers
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Course
Water Treatment Class D
Institution
Water Treatment Class D
Which of the following is a requirement for viruses under the surface water treatment rule? - ANS - 99.99% removal and/or inactivation.
What is the process that transfers water vapor from living plants into the atmosphere? - ANS - Evapotranspiration
When must a repeat sample be taken? - ANS...
Water Treatment Class D (practice exam
#4) Questions With 100% Correct
Answers
What is an example of a non-community, transient water system? - ANS ✔ - rest stop
What might occur after a filter has been backwashed? - ANS ✔ - Turbidity momentarily increases in
the filter effluent.
What is the lowest reportable concentration for a constituents called? - ANS ✔ - Detection level for
reporting
Which of the following is part of the multiple tube fermentation analysis? - ANS ✔ - presumptive,
confirmed, completed
What is 4 log removal? - ANS ✔ - 99.99%
What is considered to be a base? - ANS ✔ - pH in the range of 8 to 14
Which organisms use organic matter for energy growth? - ANS ✔ - heterotrophic
What organism is cable of causing diseases? - ANS ✔ - Pathogen
What is the term used to describe removal or destruction of all microorganisms? - ANS ✔ -
Sterilization
Which process releases water vapor into the atmosphere by living plants? - ANS ✔ - transpiration
What is the zone of saturation? - ANS ✔ - The soil located below the top of the groundwater table
, Water Treatment Class D (practice exam
#4) Questions With 100% Correct
Answers
What is an example of combined chlorine? - ANS ✔ - Monochloramine
Which of the following is a chlorine spill kit for a one-ton container? - ANS ✔ - Spill kit B.
What is the purpose of pre-chlorination? - ANS ✔ - To control taste
What should be used to convey chlorine gas out of a one-ton container? - ANS ✔ - Upper valve
What is typically the cause of taste and odor problems in raw surface water? - ANS ✔ - Algae growth
What is the best pH for coagulation? - ANS ✔ - 5-7
What are the 4 zones of a clarifier? - ANS ✔ - inlet, outlet, settling, sludge
What is used to protect the under drain in a filtration system? - ANS ✔ - Gravel
What is not the cause of a short filter run? - ANS ✔ - low flow
What would not trigger a backwash in a filtration system? - ANS ✔ - temperature
What is breakthrough? - ANS ✔ - A crack in the filter bed that allows flocs to pass through
Where should sodium hypochlorite be stored? - ANS ✔ - Away from anything that will corrode.
What is the langelier's saturation index? - ANS ✔ - An indicator of the corrosivity of water
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