Water Treatment Practice Exam #2.Final Test
2026\2027.
What is a pathogen?
Disease-causing microorganisms.
What is the impact of algae to water quality?
Taste and odor problems.
What is the concentration of chlorine gas?
100%.
Which of the following is not used to mix coagulants?
Horizontal paddle wheel.
What is considered to be a quick remedy to adress a sudden increase in filtered
water turbidity?
Feed a filter-aid chemical to the filter influent.
What is the likely cause of a pinping noise in a pump?
Cavitation
Which of the following controls the efficiency of removing suspended solids in the
sedimentation process?
Flowrate
What is a sanitary survey?
An analisis to determine all potencial water quality impacts to a proposed well.
Which of the following categories does bacterial belong to?
Colloidal
Under the Surface Water Treatment Rule, what must the reduction of viruses be
through filtration and disinfection?
99.99%
Which of the following is not considered free residual chlorine?
Monochloramine
Why is coliform used as a indicator organism?
It reduce the complexity and cost of analysis.
, Water Treatment Practice Exam #2.Final Test
2026\2027.
What is an example of a non-community, non-transient water
School.
What is the purpose of a packing in a pump?
Control the leakege of water along the pump shaft and prevent air from entering along the
shaft when the pump is in a suction lift condition.
What does the addition of carbon dioxide do to the pH of water?
Lowers it.
What is an unconfined aquifer?
One in which groundwater posseses a free surface open to the atmosphere.
What is static water level in a well?
Water level when pump is not running.
Which of the following Will least likely impact the formation of flocs during the
coagulation and flocculation process?
Hardness.
What is formed when free chlorine reacts with ammonia?
Chloramine.
Which contaminant causes Blue Baby Syndrome?
Nitrate.
What is free chlorine?
The concentration of residual chlorine in water which is present as dissolved gas (CL2),
hypochlorous acid (HOCI), and/or hypochlorite ion (OCI).
What is a thermocline?
A thin but distinct layer in a reservoir in which temperature changes more rapidly with
depth than it does in the layers above or below.
What agency protects the health and safety of industrial employees?
OSHA
What is the first priority in water treatment?
Production of safe drinking water.
What is the health effect of consuming water with high levels of lead?
Cardiovascular effects, increased blood pressure and incidence of hypertension.
2026\2027.
What is a pathogen?
Disease-causing microorganisms.
What is the impact of algae to water quality?
Taste and odor problems.
What is the concentration of chlorine gas?
100%.
Which of the following is not used to mix coagulants?
Horizontal paddle wheel.
What is considered to be a quick remedy to adress a sudden increase in filtered
water turbidity?
Feed a filter-aid chemical to the filter influent.
What is the likely cause of a pinping noise in a pump?
Cavitation
Which of the following controls the efficiency of removing suspended solids in the
sedimentation process?
Flowrate
What is a sanitary survey?
An analisis to determine all potencial water quality impacts to a proposed well.
Which of the following categories does bacterial belong to?
Colloidal
Under the Surface Water Treatment Rule, what must the reduction of viruses be
through filtration and disinfection?
99.99%
Which of the following is not considered free residual chlorine?
Monochloramine
Why is coliform used as a indicator organism?
It reduce the complexity and cost of analysis.
, Water Treatment Practice Exam #2.Final Test
2026\2027.
What is an example of a non-community, non-transient water
School.
What is the purpose of a packing in a pump?
Control the leakege of water along the pump shaft and prevent air from entering along the
shaft when the pump is in a suction lift condition.
What does the addition of carbon dioxide do to the pH of water?
Lowers it.
What is an unconfined aquifer?
One in which groundwater posseses a free surface open to the atmosphere.
What is static water level in a well?
Water level when pump is not running.
Which of the following Will least likely impact the formation of flocs during the
coagulation and flocculation process?
Hardness.
What is formed when free chlorine reacts with ammonia?
Chloramine.
Which contaminant causes Blue Baby Syndrome?
Nitrate.
What is free chlorine?
The concentration of residual chlorine in water which is present as dissolved gas (CL2),
hypochlorous acid (HOCI), and/or hypochlorite ion (OCI).
What is a thermocline?
A thin but distinct layer in a reservoir in which temperature changes more rapidly with
depth than it does in the layers above or below.
What agency protects the health and safety of industrial employees?
OSHA
What is the first priority in water treatment?
Production of safe drinking water.
What is the health effect of consuming water with high levels of lead?
Cardiovascular effects, increased blood pressure and incidence of hypertension.
