Water Treatment Operator Certification
Study Guide (AWWA) Exam Questions
and Answers 100% Pass
A continuously flowing watercourse - ANSWER-Perennial Stream
Algae causes PH to ....... at night - ANSWER-Decrease
What contributes to creation of algae blooms - ANSWER-Increased nutrients
Iron is found mostly in what sources of water - ANSWER-Groundwater
Also called the rule of reasonable sharing - ANSWER-Riparian Doctrine
Water high in salinity and warm is - ANSWER-Low in dissolved oxygen
Reservoir turnover - ANSWER-Denser water at surface sinking toward the bottom
Water that flows into rivers after rainfall - ANSWER-Surface runoff
Recreation can ....... of land adjacent to a reservoir - ANSWER-increase the threat
of erosion
Water bearing geological zone composed of material deposited by flowing rivers -
ANSWER-Alluvial aquifer
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 1
, What effect will algae have on dissolved oxygen - ANSWER-Increase DO during
the day and lower DO during the night
How does alkalinity effect the use of copper sulfate - ANSWER-Copper sulfate is
more effective as alkalinity decreases
The amount of water in a formation depends on..... - ANSWER-The porosity of
the water-bearing formation
What enables blue green algae to grow - ANSWER-Nutrients
Recommended loading rate of copper sulfate for algae control - ANSWER-5.4 lbs
per acre of surface area
Primary origin of coliform bacteria - ANSWER-Animal or human feces
Amount of water a well produces for each foot of drawdown - ANSWER-Specific
capacity
Most common well used in public water supply - ANSWER-Drilled well
What is disinfection - ANSWER-inactivation or killing of pathogenic organisms
free chlorine residual valus are based on a contact time of.... - ANSWER-10
minutes
Strength of Calcium Hypochlorite - ANSWER-65-70%
What chemicals raise PH in water - ANSWER-Soda Ash, Caustic Soda,
As water temp increases, disinfection action....... - ANSWER-Increases
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 2
Study Guide (AWWA) Exam Questions
and Answers 100% Pass
A continuously flowing watercourse - ANSWER-Perennial Stream
Algae causes PH to ....... at night - ANSWER-Decrease
What contributes to creation of algae blooms - ANSWER-Increased nutrients
Iron is found mostly in what sources of water - ANSWER-Groundwater
Also called the rule of reasonable sharing - ANSWER-Riparian Doctrine
Water high in salinity and warm is - ANSWER-Low in dissolved oxygen
Reservoir turnover - ANSWER-Denser water at surface sinking toward the bottom
Water that flows into rivers after rainfall - ANSWER-Surface runoff
Recreation can ....... of land adjacent to a reservoir - ANSWER-increase the threat
of erosion
Water bearing geological zone composed of material deposited by flowing rivers -
ANSWER-Alluvial aquifer
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 1
, What effect will algae have on dissolved oxygen - ANSWER-Increase DO during
the day and lower DO during the night
How does alkalinity effect the use of copper sulfate - ANSWER-Copper sulfate is
more effective as alkalinity decreases
The amount of water in a formation depends on..... - ANSWER-The porosity of
the water-bearing formation
What enables blue green algae to grow - ANSWER-Nutrients
Recommended loading rate of copper sulfate for algae control - ANSWER-5.4 lbs
per acre of surface area
Primary origin of coliform bacteria - ANSWER-Animal or human feces
Amount of water a well produces for each foot of drawdown - ANSWER-Specific
capacity
Most common well used in public water supply - ANSWER-Drilled well
What is disinfection - ANSWER-inactivation or killing of pathogenic organisms
free chlorine residual valus are based on a contact time of.... - ANSWER-10
minutes
Strength of Calcium Hypochlorite - ANSWER-65-70%
What chemicals raise PH in water - ANSWER-Soda Ash, Caustic Soda,
As water temp increases, disinfection action....... - ANSWER-Increases
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 2
