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Water Treatment E Questions and Correct
Answers/ Latest Update / Already Graded
Who is primarily responsible for the safety of an operator?
Ans: The operator
Specific capacity
Ans: well pumping rate/ drawdown
What is HTH and its dangers
Ans: (Calcium Hypochlorite)A powder Disinfectant, more
stable than sodium hypochlorite (liquid bleach). Corrosive and
toxic, self heating, emits toxic chlorine gas.
What is a foot valve?
Ans: Check valve at the end of a suction pipe to prevent back
flow. Prevents the loss of prime.
What is a Gate Valve?
Ans: a valve that is either 100% open or closed.
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What is a Cross Connection?
Ans: The connection between drinking water and an
unapproved water supply. Ex. between a storm drain and
sanitary collection. Potable and non-potable water connection.
What is a check valve?
Ans: a hinged disk or flap that prevents back flow.
What is the most common injury of a water treatment operator?
Ans: Slips and falls.
What is the minimum thickness for a grout seal of a well?
Ans: 3 Inches.
What is the exclusion distance (Isolation zone) around a well? and what
is it for?
Ans: Restricted land use around well to prevent contamination
of water.
What is a rotary pump and what is its primary use?
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Ans: Displacement pump rotating in a pump case, alternatively
draws in and discharges water.
What is a pathogen?
Ans: Disease causing microorganisms.
What is a grab sample?
Ans: a single sample of water at a time and place that only
represents the water at that time and place. (pH, Bact T,
Temperature, TRC and FRC)
What is a composite sample?
Ans: individual samples at regular intervals over 24 hours
combined for the average conditions during that time frame.
What is the process for collecting a coliform sample?
Ans: fill to the lid or 1" from the top
Where should samples never be taken?
Ans: from drinking fountains, restrooms, hoses or taps that
contain aerators.
All rights reserved © 2025/ 2026 |
Water Treatment E Questions and Correct
Answers/ Latest Update / Already Graded
Who is primarily responsible for the safety of an operator?
Ans: The operator
Specific capacity
Ans: well pumping rate/ drawdown
What is HTH and its dangers
Ans: (Calcium Hypochlorite)A powder Disinfectant, more
stable than sodium hypochlorite (liquid bleach). Corrosive and
toxic, self heating, emits toxic chlorine gas.
What is a foot valve?
Ans: Check valve at the end of a suction pipe to prevent back
flow. Prevents the loss of prime.
What is a Gate Valve?
Ans: a valve that is either 100% open or closed.
All rights reserved © 2025/ 2026 |
, Page |2
What is a Cross Connection?
Ans: The connection between drinking water and an
unapproved water supply. Ex. between a storm drain and
sanitary collection. Potable and non-potable water connection.
What is a check valve?
Ans: a hinged disk or flap that prevents back flow.
What is the most common injury of a water treatment operator?
Ans: Slips and falls.
What is the minimum thickness for a grout seal of a well?
Ans: 3 Inches.
What is the exclusion distance (Isolation zone) around a well? and what
is it for?
Ans: Restricted land use around well to prevent contamination
of water.
What is a rotary pump and what is its primary use?
All rights reserved © 2025/ 2026 |
, Page |3
Ans: Displacement pump rotating in a pump case, alternatively
draws in and discharges water.
What is a pathogen?
Ans: Disease causing microorganisms.
What is a grab sample?
Ans: a single sample of water at a time and place that only
represents the water at that time and place. (pH, Bact T,
Temperature, TRC and FRC)
What is a composite sample?
Ans: individual samples at regular intervals over 24 hours
combined for the average conditions during that time frame.
What is the process for collecting a coliform sample?
Ans: fill to the lid or 1" from the top
Where should samples never be taken?
Ans: from drinking fountains, restrooms, hoses or taps that
contain aerators.
All rights reserved © 2025/ 2026 |
