1|Page
Virginia Waterworks Operator Class 5 Exam ||Verified
Exam!!!||Questions with Correct Answers and
explanations LATEST THIS YEAR -JUST
RELEASED.pdf||NEWEST EXAM!!!
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
,2|Page
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
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
,3|Page
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 values are based on a contact time
of.... - Answer-10 minutes
Strength of Calcium Hypochlorite - Answer-65-70%
, 4|Page
What chemicals raise PH in water - Answer-Soda Ash,
Caustic Soda,
As water temp increases, disinfection action....... - Answer-
Increases
Maximum chlorine usage per day from a 150lb cylinder -
Answer-42 lbs
What chemical is used to soften water through chemical
precipitation - Answer-Calcium hydroxide (lime)
Mudballs are clumps of........ - Answer-Filter media and
other material
Coagulation occurs during the first ..... - Answer-1 to 5
seconds
When should a filter be backwashed - Answer-High head,
turbidity breakthrough, or designated hours
Virginia Waterworks Operator Class 5 Exam ||Verified
Exam!!!||Questions with Correct Answers and
explanations LATEST THIS YEAR -JUST
RELEASED.pdf||NEWEST EXAM!!!
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
,2|Page
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
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
,3|Page
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 values are based on a contact time
of.... - Answer-10 minutes
Strength of Calcium Hypochlorite - Answer-65-70%
, 4|Page
What chemicals raise PH in water - Answer-Soda Ash,
Caustic Soda,
As water temp increases, disinfection action....... - Answer-
Increases
Maximum chlorine usage per day from a 150lb cylinder -
Answer-42 lbs
What chemical is used to soften water through chemical
precipitation - Answer-Calcium hydroxide (lime)
Mudballs are clumps of........ - Answer-Filter media and
other material
Coagulation occurs during the first ..... - Answer-1 to 5
seconds
When should a filter be backwashed - Answer-High head,
turbidity breakthrough, or designated hours
