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Water Treatment Final Exam|153 Q’s and A’s
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- Water Treatment Final Exam|153 Q’s And A’s
Water Treatment Final Exam|153 Q’s and A’s
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Water Treatment Final Exam|153Q’s and A’s
Whats a rapid method of estimating total dissolved content of a water
supply? - -Specific conductance
-Waterfall aeration devices may cause what type of problems? - -Encourage
biological growth
-If a person is poisoned by inhaling fluoride what is the first symptom? - -
Sharp biting pain to the nose followed by a runny nose or a nose bleed
-Drinking water waste is considered what type of waste? - -Industrial
-pH kept at ____ will precipitate calcium carbonate? - -10
-Excess pink water can be caused by what? - -Potassium permanganate
overdose
-Pressure in a distribution system should not fall below what level? - -20psi
-What is the MCL for Trihalomethanes - -0.08 milligrams per liter
-Shortened filter runs can occur because of air bound filters, why is this? - -
Caused by the release of dissolved air in saturated cold water due to a
decrease in pressure
-What is the most expensive aeration device? - -Mechanical
-In the Ion exchange process, calcium(Ca) and magnesium(Mg) Ions are
exchanged for what? - -Na- Ions
-What are the four stages of the operation of an ion exchange softener? - -
Service, Brine, Backwash, Rinse
-What is the chief cause of accidents? - -Carelessness/ negligence
-Drinking water should be free of what 2 things? - -Bacteria and toxins
-Ton tanks have how many fusible metal safety plugs on each ends? - -3 to
4- each side
-If you have positive sample for total coliform, do what? - -Repeat samples
are required (3) tap upstream and downstream
, -Filters are clogged by what, that can cause head loss? - -Algae/ aquatic
micro organisms
-What is the meaning of eutrophic - -High nutrient content
-What is a bubbler tube used for? - -Measuring the depths of a well
-What is the primary advantage of vacuum system chlorination? - -Safety
-When chlorine and ammonia are added to water what is formed? - -
Chloramines
-What is tapered energy mixing? - -Reduction of speed or surface area of
the paddle or basin
-What is the best appearance of a floc particle? - -Discrete (separate) fairly
dense
-What is a cross connection? - -Connection between a drinking water supply
and a unapproved water supply
-What is the meaning of MCL? - -Maximum contaminant level, (largest
allowable amount)
-What is multi media? - -Sand , anthracite coal, garnet
-Hydrochloric acid reacts with what to form hydrogen gas? - -Metal
-Venturi's propellar meters, etc .... Are used to measure what? - -Flows
-Why should lime and alum sludge never be mixed? - -Could cause an
explosion
-What is the most common problem due to algae? - -Taste and odors
-An increase in lime will have effect on pH? - -Increase pH
-How do you check for chlorine leaks? - -Ammonia soaked rags
-What effect does chlorine gas have on water? - -Lowers the pH
-The addition of caustic soda will have what effect on alkalinity? - -Increase
alkalinity
-What is the common coagulant? - -Alum
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