Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
Water Treatment Final Exam Practice
Questions and Answers
Whats a rapid method of estimating total dissolved content of a water supply? - ANSWER✔✔-Specific
conductance
Waterfall aeration devices may cause what type of problems? - ANSWER✔✔-Encourage biological
growth
If a person is poisoned by inhaling fluoride what is the first symptom? - ANSWER✔✔-Sharp biting pain to
the nose followed by a runny nose or a nose bleed
Drinking water waste is considered what type of waste? - ANSWER✔✔-Industrial
pH kept at ____ will precipitate calcium carbonate? - ANSWER✔✔-10
Excess pink water can be caused by what? - ANSWER✔✔-Potassium permanganate overdose
Pressure in a distribution system should not fall below what level? - ANSWER✔✔-20psi
What is the MCL for Trihalomethanes - ANSWER✔✔-0.08 milligrams per liter
Shortened filter runs can occur because of air bound filters, why is this? - ANSWER✔✔-Caused by the
release of dissolved air in saturated cold water due to a decrease in pressure
What is the most expensive aeration device? - ANSWER✔✔-Mechanical
Copyright ©Stuvia International BV 2010-2024 Page 1/11
, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
In the Ion exchange process, calcium(Ca) and magnesium(Mg) Ions are exchanged for what? -
ANSWER✔✔-Na- Ions
What are the four stages of the operation of an ion exchange softener? - ANSWER✔✔-Service, Brine,
Backwash, Rinse
What is the chief cause of accidents? - ANSWER✔✔-Carelessness/ negligence
Drinking water should be free of what 2 things? - ANSWER✔✔-Bacteria and toxins
Ton tanks have how many fusible metal safety plugs on each ends? - ANSWER✔✔-3 to 4- each side
If you have positive sample for total coliform, do what? - ANSWER✔✔-Repeat samples are required (3)
tap upstream and downstream
Filters are clogged by what, that can cause head loss? - ANSWER✔✔-Algae/ aquatic micro organisms
What is the meaning of eutrophic - ANSWER✔✔-High nutrient content
What is a bubbler tube used for? - ANSWER✔✔-Measuring the depths of a well
What is the primary advantage of vacuum system chlorination? - ANSWER✔✔-Safety
When chlorine and ammonia are added to water what is formed? - ANSWER✔✔-Chloramines
What is tapered energy mixing? - ANSWER✔✔-Reduction of speed or surface area of the paddle or basin
What is the best appearance of a floc particle? - ANSWER✔✔-Discrete (separate) fairly dense
What is a cross connection? - ANSWER✔✔-Connection between a drinking water supply and a
unapproved water supply
What is the meaning of MCL? - ANSWER✔✔-Maximum contaminant level, (largest allowable amount)
Copyright ©Stuvia International BV 2010-2024 Page 2/11
Water Treatment Final Exam Practice
Questions and Answers
Whats a rapid method of estimating total dissolved content of a water supply? - ANSWER✔✔-Specific
conductance
Waterfall aeration devices may cause what type of problems? - ANSWER✔✔-Encourage biological
growth
If a person is poisoned by inhaling fluoride what is the first symptom? - ANSWER✔✔-Sharp biting pain to
the nose followed by a runny nose or a nose bleed
Drinking water waste is considered what type of waste? - ANSWER✔✔-Industrial
pH kept at ____ will precipitate calcium carbonate? - ANSWER✔✔-10
Excess pink water can be caused by what? - ANSWER✔✔-Potassium permanganate overdose
Pressure in a distribution system should not fall below what level? - ANSWER✔✔-20psi
What is the MCL for Trihalomethanes - ANSWER✔✔-0.08 milligrams per liter
Shortened filter runs can occur because of air bound filters, why is this? - ANSWER✔✔-Caused by the
release of dissolved air in saturated cold water due to a decrease in pressure
What is the most expensive aeration device? - ANSWER✔✔-Mechanical
Copyright ©Stuvia International BV 2010-2024 Page 1/11
, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
In the Ion exchange process, calcium(Ca) and magnesium(Mg) Ions are exchanged for what? -
ANSWER✔✔-Na- Ions
What are the four stages of the operation of an ion exchange softener? - ANSWER✔✔-Service, Brine,
Backwash, Rinse
What is the chief cause of accidents? - ANSWER✔✔-Carelessness/ negligence
Drinking water should be free of what 2 things? - ANSWER✔✔-Bacteria and toxins
Ton tanks have how many fusible metal safety plugs on each ends? - ANSWER✔✔-3 to 4- each side
If you have positive sample for total coliform, do what? - ANSWER✔✔-Repeat samples are required (3)
tap upstream and downstream
Filters are clogged by what, that can cause head loss? - ANSWER✔✔-Algae/ aquatic micro organisms
What is the meaning of eutrophic - ANSWER✔✔-High nutrient content
What is a bubbler tube used for? - ANSWER✔✔-Measuring the depths of a well
What is the primary advantage of vacuum system chlorination? - ANSWER✔✔-Safety
When chlorine and ammonia are added to water what is formed? - ANSWER✔✔-Chloramines
What is tapered energy mixing? - ANSWER✔✔-Reduction of speed or surface area of the paddle or basin
What is the best appearance of a floc particle? - ANSWER✔✔-Discrete (separate) fairly dense
What is a cross connection? - ANSWER✔✔-Connection between a drinking water supply and a
unapproved water supply
What is the meaning of MCL? - ANSWER✔✔-Maximum contaminant level, (largest allowable amount)
Copyright ©Stuvia International BV 2010-2024 Page 2/11
