Water Treatment Operator Certification Study
Guide test exam 2024/2025
A continuously flowing watercourse
Perennial Stream
Algae causes PH to ....... at night
Decrease
What contributes to creation of algae blooms
Increased nutrients
Iron is found mostly in what sources of water
Groundwater
Also called the rule of reasonable sharing
Riparian Doctrine
Water high in salinity and warm is
Low in dissolved oxygen
Reservoir turnover
Denser water at surface sinking toward the bottom
Water that flows into rivers after rainfall
Surface runoff
Recreation can ....... of land adjacent to a reservoir
increase the threat of erosion
Water bearing geological zone composed of material deposited by flowing rivers
Alluvial aquifer
What effect will algae have on dissolved oxygen
Increase DO during the day and lower DO during the night
How does alkalinity effect the use of copper sulfate
Copper sulfate is more effective as alkalinity decreases
The amount of water in a formation depends on.....
The porosity of the water-bearing formation
What enables blue green algae to grow
Nutrients
, Recommended loading rate of copper sulfate for algae control
5.4 lbs per acre of surface area
Primary origin of coliform bacteria
Animal or human feces
Amount of water a well produces for each foot of drawdown
Specific capacity
Most common well used in public water supply
Drilled well
What is disinfection
inactivation or killing of pathogenic organisms
free chlorine residual valus are based on a contact time of....
10 minutes
Strength of Calcium Hypochlorite
65-70%
What chemicals raise PH in water
Soda Ash, Caustic Soda,
As water temp increases, disinfection action.......
Increases
Maximum chlorine usage per day from a 150lb cylinder
42 lbs
What chemical is used to soften water through chemical precipitation
Calcium hydroxide (lime)
Mudballs are clumps of........
Filter media and other material
Coagulation occurs during the first .....
1 to 5 seconds
When should a filter be backwashed
High head, turbidity breakthrough, or designated hours
Guide test exam 2024/2025
A continuously flowing watercourse
Perennial Stream
Algae causes PH to ....... at night
Decrease
What contributes to creation of algae blooms
Increased nutrients
Iron is found mostly in what sources of water
Groundwater
Also called the rule of reasonable sharing
Riparian Doctrine
Water high in salinity and warm is
Low in dissolved oxygen
Reservoir turnover
Denser water at surface sinking toward the bottom
Water that flows into rivers after rainfall
Surface runoff
Recreation can ....... of land adjacent to a reservoir
increase the threat of erosion
Water bearing geological zone composed of material deposited by flowing rivers
Alluvial aquifer
What effect will algae have on dissolved oxygen
Increase DO during the day and lower DO during the night
How does alkalinity effect the use of copper sulfate
Copper sulfate is more effective as alkalinity decreases
The amount of water in a formation depends on.....
The porosity of the water-bearing formation
What enables blue green algae to grow
Nutrients
, Recommended loading rate of copper sulfate for algae control
5.4 lbs per acre of surface area
Primary origin of coliform bacteria
Animal or human feces
Amount of water a well produces for each foot of drawdown
Specific capacity
Most common well used in public water supply
Drilled well
What is disinfection
inactivation or killing of pathogenic organisms
free chlorine residual valus are based on a contact time of....
10 minutes
Strength of Calcium Hypochlorite
65-70%
What chemicals raise PH in water
Soda Ash, Caustic Soda,
As water temp increases, disinfection action.......
Increases
Maximum chlorine usage per day from a 150lb cylinder
42 lbs
What chemical is used to soften water through chemical precipitation
Calcium hydroxide (lime)
Mudballs are clumps of........
Filter media and other material
Coagulation occurs during the first .....
1 to 5 seconds
When should a filter be backwashed
High head, turbidity breakthrough, or designated hours
