WATER TREATMENT OPERATOR
CERTIFICATION STUDY GUIDE (AWWA)
LATEST EXAM 2025-2026 WITH MULTIPLE-
CHOICE QUESTIONS AND DETAILED SOLVED
SOLUTIONS ALREADY GRADED A+ AND 100%
GUARANTEE PASS (JUST RELEASED!!!!!!)
Water bearing geological zone composed of material deposited
by flowing rivers - THE CORRECT ANSWER-Alluvial aquifer
What effect will algae have on dissolved oxygen - THE CORRECT
ANSWER-Increase DO during the day and lower DO during the
night
How does alkalinity effect the use of copper sulfate - THE CORRECT
ANSWER-Copper sulfate is more effective as alkalinity decreases
The amount of water in a formation depends on..... - THE CORRECT
ANSWER-The porosity of the water-bearing formation
What enables blue green algae to grow - THE CORRECT ANSWER-
Nutrients
Recommended loading rate of copper sulfate for algae control -
THE CORRECT ANSWER-5.4 lbs per acre of surface area
, Primary origin of coliform bacteria - THE CORRECT ANSWER-Animal
or human feces
Amount of water a well produces for each foot of drawdown -
THE CORRECT ANSWER-Specific capacity
Most common well used in public water supply - THE CORRECT
ANSWER-Drilled well
What is disinfection - THE CORRECT ANSWER-inactivation or killing
of pathogenic organisms
free chlorine residual valus are based on a contact time of.... -
THE CORRECT ANSWER-10 minutes
Strength of Calcium Hypochlorite - THE CORRECT ANSWER-65-70%
What chemicals raise PH in water - THE CORRECT ANSWER-Soda Ash,
Caustic Soda,
As water temp increases, disinfection action....... - THE CORRECT
ANSWER-Increases
Maximum chlorine usage per day from a 150lb cylinder - THE
CORRECT ANSWER-42 lbs
What chemical is used to soften water through chemical
precipitation - THE CORRECT ANSWER-Calcium hydroxide (lime)
CERTIFICATION STUDY GUIDE (AWWA)
LATEST EXAM 2025-2026 WITH MULTIPLE-
CHOICE QUESTIONS AND DETAILED SOLVED
SOLUTIONS ALREADY GRADED A+ AND 100%
GUARANTEE PASS (JUST RELEASED!!!!!!)
Water bearing geological zone composed of material deposited
by flowing rivers - THE CORRECT ANSWER-Alluvial aquifer
What effect will algae have on dissolved oxygen - THE CORRECT
ANSWER-Increase DO during the day and lower DO during the
night
How does alkalinity effect the use of copper sulfate - THE CORRECT
ANSWER-Copper sulfate is more effective as alkalinity decreases
The amount of water in a formation depends on..... - THE CORRECT
ANSWER-The porosity of the water-bearing formation
What enables blue green algae to grow - THE CORRECT ANSWER-
Nutrients
Recommended loading rate of copper sulfate for algae control -
THE CORRECT ANSWER-5.4 lbs per acre of surface area
, Primary origin of coliform bacteria - THE CORRECT ANSWER-Animal
or human feces
Amount of water a well produces for each foot of drawdown -
THE CORRECT ANSWER-Specific capacity
Most common well used in public water supply - THE CORRECT
ANSWER-Drilled well
What is disinfection - THE CORRECT ANSWER-inactivation or killing
of pathogenic organisms
free chlorine residual valus are based on a contact time of.... -
THE CORRECT ANSWER-10 minutes
Strength of Calcium Hypochlorite - THE CORRECT ANSWER-65-70%
What chemicals raise PH in water - THE CORRECT ANSWER-Soda Ash,
Caustic Soda,
As water temp increases, disinfection action....... - THE CORRECT
ANSWER-Increases
Maximum chlorine usage per day from a 150lb cylinder - THE
CORRECT ANSWER-42 lbs
What chemical is used to soften water through chemical
precipitation - THE CORRECT ANSWER-Calcium hydroxide (lime)
