Water Treatment Final UPDATED
ACTUAL Questions and CORRECT
Answers
Whats a rapid method of estimating total dissolved content of a water supply? - CORRECT
ANSWER- ✔✔Specific conductance
Waterfall aeration devices may cause what type of problems? - CORRECT ANSWER-
✔✔Encourage biological growth
If a person is poisoned by inhaling fluoride what is the first symptom? - CORRECT
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? - CORRECT ANSWER-
✔✔Industrial
pH kept at ____ will precipitate calcium carbonate? - CORRECT ANSWER- ✔✔10
Excess pink water can be caused by what? - CORRECT ANSWER- ✔✔Potassium
permanganate overdose
Pressure in a distribution system should not fall below what level? - CORRECT ANSWER-
✔✔20psi
What is the MCL for Trihalomethanes - CORRECT ANSWER- ✔✔0.08 milligrams per liter
Shortened filter runs can occur because of air bound filters, why is this? - CORRECT
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? - CORRECT ANSWER- ✔✔Mechanical
, In the Ion exchange process, calcium(Ca) and magnesium(Mg) Ions are exchanged for what?
- CORRECT ANSWER- ✔✔Na- Ions
What are the four stages of the operation of an ion exchange softener? - CORRECT
ANSWER- ✔✔Service, Brine, Backwash, Rinse
What is the chief cause of accidents? - CORRECT ANSWER- ✔✔Carelessness/ negligence
Drinking water should be free of what 2 things? - CORRECT ANSWER- ✔✔Bacteria and
toxins
Ton tanks have how many fusible metal safety plugs on each ends? - CORRECT ANSWER-
✔✔3 to 4- each side
If you have positive sample for total coliform, do what? - CORRECT ANSWER- ✔✔Repeat
samples are required (3) tap upstream and downstream
Filters are clogged by what, that can cause head loss? - CORRECT ANSWER- ✔✔Algae/
aquatic micro organisms
What is the meaning of eutrophic - CORRECT ANSWER- ✔✔High nutrient content
What is a bubbler tube used for? - CORRECT ANSWER- ✔✔Measuring the depths of a well
What is the primary advantage of vacuum system chlorination? - CORRECT ANSWER-
✔✔Safety
When chlorine and ammonia are added to water what is formed? - CORRECT ANSWER-
✔✔Chloramines
What is tapered energy mixing? - CORRECT ANSWER- ✔✔Reduction of speed or surface
area of the paddle or basin
ACTUAL Questions and CORRECT
Answers
Whats a rapid method of estimating total dissolved content of a water supply? - CORRECT
ANSWER- ✔✔Specific conductance
Waterfall aeration devices may cause what type of problems? - CORRECT ANSWER-
✔✔Encourage biological growth
If a person is poisoned by inhaling fluoride what is the first symptom? - CORRECT
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? - CORRECT ANSWER-
✔✔Industrial
pH kept at ____ will precipitate calcium carbonate? - CORRECT ANSWER- ✔✔10
Excess pink water can be caused by what? - CORRECT ANSWER- ✔✔Potassium
permanganate overdose
Pressure in a distribution system should not fall below what level? - CORRECT ANSWER-
✔✔20psi
What is the MCL for Trihalomethanes - CORRECT ANSWER- ✔✔0.08 milligrams per liter
Shortened filter runs can occur because of air bound filters, why is this? - CORRECT
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? - CORRECT ANSWER- ✔✔Mechanical
, In the Ion exchange process, calcium(Ca) and magnesium(Mg) Ions are exchanged for what?
- CORRECT ANSWER- ✔✔Na- Ions
What are the four stages of the operation of an ion exchange softener? - CORRECT
ANSWER- ✔✔Service, Brine, Backwash, Rinse
What is the chief cause of accidents? - CORRECT ANSWER- ✔✔Carelessness/ negligence
Drinking water should be free of what 2 things? - CORRECT ANSWER- ✔✔Bacteria and
toxins
Ton tanks have how many fusible metal safety plugs on each ends? - CORRECT ANSWER-
✔✔3 to 4- each side
If you have positive sample for total coliform, do what? - CORRECT ANSWER- ✔✔Repeat
samples are required (3) tap upstream and downstream
Filters are clogged by what, that can cause head loss? - CORRECT ANSWER- ✔✔Algae/
aquatic micro organisms
What is the meaning of eutrophic - CORRECT ANSWER- ✔✔High nutrient content
What is a bubbler tube used for? - CORRECT ANSWER- ✔✔Measuring the depths of a well
What is the primary advantage of vacuum system chlorination? - CORRECT ANSWER-
✔✔Safety
When chlorine and ammonia are added to water what is formed? - CORRECT ANSWER-
✔✔Chloramines
What is tapered energy mixing? - CORRECT ANSWER- ✔✔Reduction of speed or surface
area of the paddle or basin
