Water Treatment Class D (practice exam -4) Questions With 100- Correct Answers

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Water Treatment Class D (practice exam -4) Questions With 100- Correct Answers

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2024/2025

Institution Water Treatment Class D

Course Water Treatment Class D

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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 - Sample test positive for total coliform. Why is fluoride injected into drinking water? - ANS - reduce tooth decay

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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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Uploaded on: October 26, 2024
Number of pages: 7
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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