WATER OPERATOR CLASS 3
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Hydrologic cycle - ANSWERS-The cycle which describes water
evaporating and returning to the earth is known as the:
Alum - ANSWERS-The most commonly used coagulant is:
To remove taste and odor - ANSWERS-Activated carbon is mostly
used:
Sludge zone - ANSWERS-What part of a clarifier does floc settle
into?
Raise the pH and reduce hardness - ANSWERS-What effect can lime
have on water?
Wash troughs - ANSWERS-In a rapid sand filter, backwash water is
collected and taken out of the filter though the:
Under drain system - ANSWERS-In a rapid sand filter, what collects
the filtered water?
,Mechanical surface wash and air wash. - ANSWERS-Two ways to aid
in backwashing a rapid sand filter are:
Adsorption - ANSWERS-Activated carbon works on the principal of:
Surface Water Treatment Rule - ANSWERS-Turbidity and
GWUDISW rules and regulations fall under the:
.3 NTU's or lower 95% of the time - ANSWERS-The MCL for
turbidity is:
Particles - ANSWERS-Rapid sand filters remove:
Just after the filter - ANSWERS-Calcium carbonate for corrosion
should be applied:
Gas - ANSWERS-If a gas chlorine cylinder is leaking, it will leak
slower if it leaks:
Megger - ANSWERS-An instrument used to detect a breakdown in
the internal windings of an electric motor.
Settling basin - ANSWERS-Tubes are sometimes located in the:
Speed up the flocculator - ANSWERS-To reduce the size of the floc,
you sould:
, The condition of the screens on your vents and overflows -
ANSWERS-If you notice fly larvae (blood worms) in your water
supply, what is the first thing you should start looking at as the
problem?
3 ft - ANSWERS-A ladder should extend how far above the structure
that it accesses?
ANSI/NSF 60 approval - ANSWERS-Any chemical you place into
your water must have this approval:
LDEQ - ANSWERS-Any discharge from your water plant should be
permitted by:
Polyelectrolytes - ANSWERS-Polymer is short for:
Lock out tag out - ANSWERS-The first step you should take when
working on a pump is:
Hydrogen sulfide - ANSWERS-A rotten egg odor in water indicates
what?
1 ppm - ANSWERS-What is the desired amount of fluoride in water?
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Hydrologic cycle - ANSWERS-The cycle which describes water
evaporating and returning to the earth is known as the:
Alum - ANSWERS-The most commonly used coagulant is:
To remove taste and odor - ANSWERS-Activated carbon is mostly
used:
Sludge zone - ANSWERS-What part of a clarifier does floc settle
into?
Raise the pH and reduce hardness - ANSWERS-What effect can lime
have on water?
Wash troughs - ANSWERS-In a rapid sand filter, backwash water is
collected and taken out of the filter though the:
Under drain system - ANSWERS-In a rapid sand filter, what collects
the filtered water?
,Mechanical surface wash and air wash. - ANSWERS-Two ways to aid
in backwashing a rapid sand filter are:
Adsorption - ANSWERS-Activated carbon works on the principal of:
Surface Water Treatment Rule - ANSWERS-Turbidity and
GWUDISW rules and regulations fall under the:
.3 NTU's or lower 95% of the time - ANSWERS-The MCL for
turbidity is:
Particles - ANSWERS-Rapid sand filters remove:
Just after the filter - ANSWERS-Calcium carbonate for corrosion
should be applied:
Gas - ANSWERS-If a gas chlorine cylinder is leaking, it will leak
slower if it leaks:
Megger - ANSWERS-An instrument used to detect a breakdown in
the internal windings of an electric motor.
Settling basin - ANSWERS-Tubes are sometimes located in the:
Speed up the flocculator - ANSWERS-To reduce the size of the floc,
you sould:
, The condition of the screens on your vents and overflows -
ANSWERS-If you notice fly larvae (blood worms) in your water
supply, what is the first thing you should start looking at as the
problem?
3 ft - ANSWERS-A ladder should extend how far above the structure
that it accesses?
ANSI/NSF 60 approval - ANSWERS-Any chemical you place into
your water must have this approval:
LDEQ - ANSWERS-Any discharge from your water plant should be
permitted by:
Polyelectrolytes - ANSWERS-Polymer is short for:
Lock out tag out - ANSWERS-The first step you should take when
working on a pump is:
Hydrogen sulfide - ANSWERS-A rotten egg odor in water indicates
what?
1 ppm - ANSWERS-What is the desired amount of fluoride in water?
