Water Treatment Operator Certification
with questions and well verified answers
actual exam!!! 2026
Which of the following is removed at the raw water intake? - ANSWER -Fish and debris
Which Of the following is more likely to be found in groundwater - ANSWER -minerals
What is most commonly used to control algae growth in reservoirs - ANSWER -copper
sulfate
What are common filtration rates in gravity filtration - ANSWER -2 to 10 GPM/sq.ft.
Leakage within a centrifugal pump is intended for what purpose? - ANSWER -Cool
moving parts
Which of the following is the detention of a grab sample - ANSWER -a single sample of
water collected at a particular time which represents the composition of the water ONLY at
that time and place
Adding sodium hypochlorite to water will have the following effect. - ANSWER -increase
pH
What is the purpose of the groundwater rule - ANSWER -To protect the groundwater
from disease-causing microorganisms
, What is true about the total coliform rule - ANSWER -Establishes an MCL based on the
presence and absence of total coliforms or E. coli.
What will happen to the water quality if chlorine is injected at the same location at power
activated carbon - ANSWER -Chlorine will react with carbon and naturalize the effects of
both
which of the following will react with chlorine form trihalomethane - ANSWER -natural
organic matter
What type of pump has a piston within the casing - ANSWER -Reciprocating
What must be located near a hazardous chemical storage room - ANSWER -Saftey data
sheets (SDS)
What term describes the depression of a water table - ANSWER -cone of depression
What is the radius of influence - ANSWER -The radial distance from the center of a well
bore to the point where there is no lowering of the water table
what is the best way to monitor filter performance - ANSWER -turbidity
What causes water to look cloudy - ANSWER -suspended material
what chemical is sprayed near a chlorine gas leak to produce white smoke - ANSWER -
ammonia
Which water sampling parameters must be taken in the field? - ANSWER -pH and
temperature
If the total coliform tests positive, then what must be done next? - ANSWER -Test for
fecal coliform
with questions and well verified answers
actual exam!!! 2026
Which of the following is removed at the raw water intake? - ANSWER -Fish and debris
Which Of the following is more likely to be found in groundwater - ANSWER -minerals
What is most commonly used to control algae growth in reservoirs - ANSWER -copper
sulfate
What are common filtration rates in gravity filtration - ANSWER -2 to 10 GPM/sq.ft.
Leakage within a centrifugal pump is intended for what purpose? - ANSWER -Cool
moving parts
Which of the following is the detention of a grab sample - ANSWER -a single sample of
water collected at a particular time which represents the composition of the water ONLY at
that time and place
Adding sodium hypochlorite to water will have the following effect. - ANSWER -increase
pH
What is the purpose of the groundwater rule - ANSWER -To protect the groundwater
from disease-causing microorganisms
, What is true about the total coliform rule - ANSWER -Establishes an MCL based on the
presence and absence of total coliforms or E. coli.
What will happen to the water quality if chlorine is injected at the same location at power
activated carbon - ANSWER -Chlorine will react with carbon and naturalize the effects of
both
which of the following will react with chlorine form trihalomethane - ANSWER -natural
organic matter
What type of pump has a piston within the casing - ANSWER -Reciprocating
What must be located near a hazardous chemical storage room - ANSWER -Saftey data
sheets (SDS)
What term describes the depression of a water table - ANSWER -cone of depression
What is the radius of influence - ANSWER -The radial distance from the center of a well
bore to the point where there is no lowering of the water table
what is the best way to monitor filter performance - ANSWER -turbidity
What causes water to look cloudy - ANSWER -suspended material
what chemical is sprayed near a chlorine gas leak to produce white smoke - ANSWER -
ammonia
Which water sampling parameters must be taken in the field? - ANSWER -pH and
temperature
If the total coliform tests positive, then what must be done next? - ANSWER -Test for
fecal coliform
