TCEQ SURFACE WATER B EXAMINERS ALL
QUESTIONS AND ANSWERS SURE A+
✔✔If short filter runs are occurring because of high head loss, it would be advisable to
reduce what? - ✔✔Filter aid dosage like polyelectrolytes
✔✔What is an important test for a upflow clarifier? - ✔✔Sludge density
✔✔What can replace metal coagulant polymer? - ✔✔Cationic polymer
✔✔What can control algae at the intake? - ✔✔Copper sulfate and potassium
permanganate
✔✔What do polyelectrolytes do? - ✔✔They are coagulant aids
✔✔Coagulation is what type of process? - ✔✔Coagulation is a chemical process where
a coagulant reacts chemically with the alkalinity in the water. The reaction forms an
insoluble compound that will fall out of the solution and settle.
✔✔What are the different lake levels/zones called? - ✔✔Epilimnion: top layer with fish
and air
Thermocline: middle layer (temp changes rapidly)
Hypolimnion: bottom layer with no air and H2S
, ✔✔What oxidants are considered aids in coagulation? - ✔✔Chlorine, chlorine dioxide,
potassium permanganate, ozone
✔✔If alkalinity is equal or greater than total hardness then what type of hardness do you
have? - ✔✔Temporary hardness
✔✔How do you remove fluoride? - ✔✔Sodium Aluminate
Demineralization
Reverse osmosis
✔✔What does Lime/Soda ash precipitate? - ✔✔Carbonates and non-carbonate
✔✔Carbon Monoxide is what? - ✔✔It is colorless and odorless
✔✔A treatment facility must maintain what logs? - ✔✔2 logs for cryptosporidium
3 logs for giardia
4 logs for viruses
✔✔Hardness in water is primarily caused by? - ✔✔Calcium and magnesium in water
✔✔Aeration removes what? - ✔✔Iron and manganese
✔✔What is charge neutralization? - ✔✔Positive charged absorbs to negative charged
particles determined by using a zeta-meter test. Coagulant positive charges which
neutralizes the negative charges of the turbidity
✔✔Aeration oxidizes what? - ✔✔Iron and manganese forming insoluble precipitates
✔✔What type of filters are there? - ✔✔Low pressure: Micro and Ultra
High Pressure: Nano and reverse osmosis
✔✔What is a public water system? - ✔✔It is a water system with atleast 15 service
connections or that regularly serves atleast 25 individuals daily at least 60 days out of
the year.
✔✔What is a community water system? - ✔✔A community water system is a public
water system that has the potential to serve atleast 15 service connections on a year-
round basis or that serves at least 25 residents on a year round basis.
Examples are:
Municipalities
Municipal utility districts
Rural water supply corporations
QUESTIONS AND ANSWERS SURE A+
✔✔If short filter runs are occurring because of high head loss, it would be advisable to
reduce what? - ✔✔Filter aid dosage like polyelectrolytes
✔✔What is an important test for a upflow clarifier? - ✔✔Sludge density
✔✔What can replace metal coagulant polymer? - ✔✔Cationic polymer
✔✔What can control algae at the intake? - ✔✔Copper sulfate and potassium
permanganate
✔✔What do polyelectrolytes do? - ✔✔They are coagulant aids
✔✔Coagulation is what type of process? - ✔✔Coagulation is a chemical process where
a coagulant reacts chemically with the alkalinity in the water. The reaction forms an
insoluble compound that will fall out of the solution and settle.
✔✔What are the different lake levels/zones called? - ✔✔Epilimnion: top layer with fish
and air
Thermocline: middle layer (temp changes rapidly)
Hypolimnion: bottom layer with no air and H2S
, ✔✔What oxidants are considered aids in coagulation? - ✔✔Chlorine, chlorine dioxide,
potassium permanganate, ozone
✔✔If alkalinity is equal or greater than total hardness then what type of hardness do you
have? - ✔✔Temporary hardness
✔✔How do you remove fluoride? - ✔✔Sodium Aluminate
Demineralization
Reverse osmosis
✔✔What does Lime/Soda ash precipitate? - ✔✔Carbonates and non-carbonate
✔✔Carbon Monoxide is what? - ✔✔It is colorless and odorless
✔✔A treatment facility must maintain what logs? - ✔✔2 logs for cryptosporidium
3 logs for giardia
4 logs for viruses
✔✔Hardness in water is primarily caused by? - ✔✔Calcium and magnesium in water
✔✔Aeration removes what? - ✔✔Iron and manganese
✔✔What is charge neutralization? - ✔✔Positive charged absorbs to negative charged
particles determined by using a zeta-meter test. Coagulant positive charges which
neutralizes the negative charges of the turbidity
✔✔Aeration oxidizes what? - ✔✔Iron and manganese forming insoluble precipitates
✔✔What type of filters are there? - ✔✔Low pressure: Micro and Ultra
High Pressure: Nano and reverse osmosis
✔✔What is a public water system? - ✔✔It is a water system with atleast 15 service
connections or that regularly serves atleast 25 individuals daily at least 60 days out of
the year.
✔✔What is a community water system? - ✔✔A community water system is a public
water system that has the potential to serve atleast 15 service connections on a year-
round basis or that serves at least 25 residents on a year round basis.
Examples are:
Municipalities
Municipal utility districts
Rural water supply corporations
