AWWA OpCert Exam - Treatment Process
(Introductory)
Manganese greensand manganese, iron, and hydrogen sulfide.
filtration is used to remove
The most effective process packed tower aeration.
for the removal of radon
gas, when considering
cost and footprint, would
be
If the pH is less than 6.4, sulfates.
chlorine will react with
hydrogen sulfide to form
The oxidation process alkalinity.
using chlorine will also
consume
Monomedium filter media is deeper, coarser
________________________than a
conventional filter because
the media is
,__________.
_____is used occasionally Sodium bicarbonate, increase alkalinity, pH
instead of
sodium carbonate because it
will __________ without as
much an increase in______.
Manganese will produce brown or black
_____________________water.
Dry chemicals should be in Softened water
solution before mixing
them with the water to be
treated. What water is
recommended to mix the
dry chemical in some
cases to avoid
precipitates?
Which is the weakest Chloramines
disinfectant?
Industrial bleaches used in 9% to 15%.
water treatment
disinfection range in
percentage strength of
available chlorine from
,What noncarbonate CaSO4
hardness chemical is
produced when sulfuric
acid is used to stabilize
water?
Potassium permanganate is a strong oxidizer.
Even after lime-softening, At least 35 mg/L
a small amount of CaCO3
and Mg(OH)2 remains
because it is slightly
soluble. How much is
usually left in the
softened water?
What can minimize future displacement of
the bottom gravel in a filter?
Although algae do not neurotoxins and hepatoxins, tastes and odors and filter-
typically pose a health clogging
concern, some do produce
__________ that can be a
concern. Other problems
they frequently cause in
regard to treatment are
_______________.
What is the most common Chloroform
disinfection by- product
when adding chlorine to
, water containing natural
organic matter?
Membranes made of poor
polypropylene have
_____oxidant resistance.
What is a disadvantage of It must be carefully monitored to prevent turbidity
direct filtration compared breakthrough
to conventional
treatment?
Why can rapid sand filters Coarser sand
handle higher filtration
rates compared to slow
sand filters?
Lime will precipitate CaSO4 and CaCl2
noncarbonate hardness
from the water, but it also
forms noncarbonate salts
that cause noncarbonate
hardness. What are these
salts?
What is another name for Sodium hydroxide, NaOH
caustic soda, and what is its
chemical formula?
What does detailed The frequency of sampling and testing
record-keeping for
presedimentation systems
help determine?
What water treatment Flocculation
(Introductory)
Manganese greensand manganese, iron, and hydrogen sulfide.
filtration is used to remove
The most effective process packed tower aeration.
for the removal of radon
gas, when considering
cost and footprint, would
be
If the pH is less than 6.4, sulfates.
chlorine will react with
hydrogen sulfide to form
The oxidation process alkalinity.
using chlorine will also
consume
Monomedium filter media is deeper, coarser
________________________than a
conventional filter because
the media is
,__________.
_____is used occasionally Sodium bicarbonate, increase alkalinity, pH
instead of
sodium carbonate because it
will __________ without as
much an increase in______.
Manganese will produce brown or black
_____________________water.
Dry chemicals should be in Softened water
solution before mixing
them with the water to be
treated. What water is
recommended to mix the
dry chemical in some
cases to avoid
precipitates?
Which is the weakest Chloramines
disinfectant?
Industrial bleaches used in 9% to 15%.
water treatment
disinfection range in
percentage strength of
available chlorine from
,What noncarbonate CaSO4
hardness chemical is
produced when sulfuric
acid is used to stabilize
water?
Potassium permanganate is a strong oxidizer.
Even after lime-softening, At least 35 mg/L
a small amount of CaCO3
and Mg(OH)2 remains
because it is slightly
soluble. How much is
usually left in the
softened water?
What can minimize future displacement of
the bottom gravel in a filter?
Although algae do not neurotoxins and hepatoxins, tastes and odors and filter-
typically pose a health clogging
concern, some do produce
__________ that can be a
concern. Other problems
they frequently cause in
regard to treatment are
_______________.
What is the most common Chloroform
disinfection by- product
when adding chlorine to
, water containing natural
organic matter?
Membranes made of poor
polypropylene have
_____oxidant resistance.
What is a disadvantage of It must be carefully monitored to prevent turbidity
direct filtration compared breakthrough
to conventional
treatment?
Why can rapid sand filters Coarser sand
handle higher filtration
rates compared to slow
sand filters?
Lime will precipitate CaSO4 and CaCl2
noncarbonate hardness
from the water, but it also
forms noncarbonate salts
that cause noncarbonate
hardness. What are these
salts?
What is another name for Sodium hydroxide, NaOH
caustic soda, and what is its
chemical formula?
What does detailed The frequency of sampling and testing
record-keeping for
presedimentation systems
help determine?
What water treatment Flocculation
