Water Treatment Operator Certification (AWWA) UPDATED ACTUAL
Questions and CORRECT Answers
Question: A continuously flowing watercourse
Correct Answer: Perennial Stream
Question: Algae causes PH to ....... at night
Correct Answer: Decrease
Question: What contributes to creation of algae blooms
Correct Answer: Increased nutrients
Question: Iron is found mostly in what sources of water
Correct Answer: Groundwater
Question: Also called the rule of reasonable sharing
Correct Answer: Riparian Doctrine
Question: Water high in salinity and warm is
Correct Answer: Low in dissolved oxygen
Question: Reservoir turnover
Correct Answer: Denser water at surface sinking toward the bottom
Question: Water that flows into rivers after rainfall
Correct Answer: Surface runoff
Question: Recreation can ....... of land adjacent to a reservoir
Correct Answer: increase the threat of erosion
Question: Water bearing geological zone composed of material deposited by flowing rivers
Correct Answer: Alluvial aquifer
Question: What effect will algae have on dissolved oxygen
Correct Answer: Increase DO during the day and lower DO during the night
Question: How does alkalinity effect the use of copper sulfate
Correct Answer: Copper sulfate is more effective as alkalinity decreases
Question: The amount of water in a formation depends on.....
Correct Answer: The porosity of the water-bearing formation
Question: What enables blue green algae to grow
Correct Answer: Nutrients
Question: Recommended loading rate of copper sulfate for algae control
Correct Answer: 5.4 lbs per acre of surface area
Question: Primary origin of coliform bacteria
, Correct Answer: Animal or human feces
Question: Amount of water a well produces for each foot of drawdown
Correct Answer: Specific capacity
Question: Most common well used in public water supply
Correct Answer: Drilled well
Question: What is disinfection
Correct Answer: inactivation or killing of pathogenic organisms
Question: free chlorine residual valus are based on a contact time of....
Correct Answer: 10 minutes
Question: Strength of Calcium Hypochlorite
Correct Answer: 65-70%
Question: What chemicals raise PH in water
Correct Answer: Soda Ash, Caustic Soda,
Question: As water temp increases, disinfection action.......
Correct Answer: Increases
Question: Maximum chlorine usage per day from a 150lb cylinder
Correct Answer: 42 lbs
Question: What chemical is used to soften water through chemical precipitation
Correct Answer: Calcium hydroxide (lime)
Question: Mudballs are clumps of........
Correct Answer: Filter media and other material
Question: Coagulation occurs during the first .....
Correct Answer: 1 to 5 seconds
Question: When should a filter be backwashed
Correct Answer: High head, turbidity breakthrough, or designated hours
Question: What does CaCO3 (Calcium Carbonate) do?
Correct Answer: Decreases corrosion
Question: Most important test to indicate proper sedimentation
Correct Answer: turbidity
Question: What is considered and excellent zeta potential
Correct Answer: -1 to -4
Question: What is used to test for residual chlorine
Correct Answer: DPD
Questions and CORRECT Answers
Question: A continuously flowing watercourse
Correct Answer: Perennial Stream
Question: Algae causes PH to ....... at night
Correct Answer: Decrease
Question: What contributes to creation of algae blooms
Correct Answer: Increased nutrients
Question: Iron is found mostly in what sources of water
Correct Answer: Groundwater
Question: Also called the rule of reasonable sharing
Correct Answer: Riparian Doctrine
Question: Water high in salinity and warm is
Correct Answer: Low in dissolved oxygen
Question: Reservoir turnover
Correct Answer: Denser water at surface sinking toward the bottom
Question: Water that flows into rivers after rainfall
Correct Answer: Surface runoff
Question: Recreation can ....... of land adjacent to a reservoir
Correct Answer: increase the threat of erosion
Question: Water bearing geological zone composed of material deposited by flowing rivers
Correct Answer: Alluvial aquifer
Question: What effect will algae have on dissolved oxygen
Correct Answer: Increase DO during the day and lower DO during the night
Question: How does alkalinity effect the use of copper sulfate
Correct Answer: Copper sulfate is more effective as alkalinity decreases
Question: The amount of water in a formation depends on.....
Correct Answer: The porosity of the water-bearing formation
Question: What enables blue green algae to grow
Correct Answer: Nutrients
Question: Recommended loading rate of copper sulfate for algae control
Correct Answer: 5.4 lbs per acre of surface area
Question: Primary origin of coliform bacteria
, Correct Answer: Animal or human feces
Question: Amount of water a well produces for each foot of drawdown
Correct Answer: Specific capacity
Question: Most common well used in public water supply
Correct Answer: Drilled well
Question: What is disinfection
Correct Answer: inactivation or killing of pathogenic organisms
Question: free chlorine residual valus are based on a contact time of....
Correct Answer: 10 minutes
Question: Strength of Calcium Hypochlorite
Correct Answer: 65-70%
Question: What chemicals raise PH in water
Correct Answer: Soda Ash, Caustic Soda,
Question: As water temp increases, disinfection action.......
Correct Answer: Increases
Question: Maximum chlorine usage per day from a 150lb cylinder
Correct Answer: 42 lbs
Question: What chemical is used to soften water through chemical precipitation
Correct Answer: Calcium hydroxide (lime)
Question: Mudballs are clumps of........
Correct Answer: Filter media and other material
Question: Coagulation occurs during the first .....
Correct Answer: 1 to 5 seconds
Question: When should a filter be backwashed
Correct Answer: High head, turbidity breakthrough, or designated hours
Question: What does CaCO3 (Calcium Carbonate) do?
Correct Answer: Decreases corrosion
Question: Most important test to indicate proper sedimentation
Correct Answer: turbidity
Question: What is considered and excellent zeta potential
Correct Answer: -1 to -4
Question: What is used to test for residual chlorine
Correct Answer: DPD
