Water Treatment Operator Certification Study Guide (AWWA)
1) A continuously flowing watercourse: Perennial Stream
2) Algae causes PH to ....... at night: Decrease
3) What contributes to creation of algae blooms: Increased nutrients
4) Iron is found mostly in what sources of water: Groundwater
5) Also called the rule of reasonable sharing: Riparian Doctrine
6) Water high in salinity and warm is: Low in dissolved oxygen
7) Reservoir turnover: Denser water at surface sinking toward the bottom
8) Water that flows into rivers after rainfall: Surface runoff
9) Recreation can ....... of land adjacent to a reservoir: increase the threat of
erosion
10) Water bearing geological zone composed of material deposited by
flowing rivers: Alluvial aquifer
11) What effect will algae have on dissolved oxygen: Increase DO during the
day and lower DO during the night
12) How does alkalinity effect the use of copper sulfate: Copper sulfate is
more effective as alkalinity decreases
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, Water Treatment Operator Certification Study Guide (AWWA)
13) The amount of water in a formation depends on.....: The porosity of the
water-bearing formation
14) What enables blue green algae to grow: Nutrients
15) Recommended loading rate of copper sulfate for algae control: 5.4 lbs
per acre of surface area
16) Primary origin of coliform bacteria: Animal or human feces
17) Amount of water a well produces for each foot of drawdown: Specific
capacity
18) Most common well used in public water supply: Drilled well
19) What is disinfection: inactivation or killing of pathogenic organisms
20) free chlorine residual valus are based on a contact time of....: 10 minutes
21) Strength of Calcium Hypochlorite: 65-70%
22) What chemicals raise PH in water: Soda Ash, Caustic Soda,
23) As water temp increases, disinfection action.......: Increases
24) Maximum chlorine usage per day from a 150lb cylinder: 42 lbs
25) What chemical is used to soften water through chemical precipitation:
Calcium hydroxide (lime)
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