3/24/25, 8:05 AM TCEQ Class B Surface Water B test material -Exam 2025 update|comprehensive questions and verified answers (complete sol…
TCEQ Class B Surface Water B test material -
Exam 2025 update|comprehensive questions
and verified answers (complete solutions)
ASSURED SUCCESS|GRADE A+!!
Save
Terms in this set (293)
What is the most It is the ability of the material to resist internal and
important factor affecting external corrosion
the useful life of service
lines?
When does Suction Head Suction head exists when the source of supply is
exist? above the centerline of the pump.
NPSH is the pressure under which water enters the
What is Net positive eye of the impeller in a centrifugal pump.
Suction Head (NPSH) Insufficient NPSH is the main cause of pump
cavitation
Chlorine Dioxide is a gas used in small quantities to
disinfect water. It does not react with organics to
form THMs and HAAs. It oxidizes phenols,
manganese, iron, sulfurous and organic compounds
Explain and expand on
which aids in the removal of tastes and odors. It is a
Chlorine Dioxide (what it
very effective bactericide and a superior virocide. It
reacts with, oxidizes, etc)
dies not combine with ammonia. Chlorine Dioxide
MRDL is .8 mg/L and monitoring procedures are the
same as for chlorine. The Chlorite MCL is .q mg/L
and must be monitored daily.
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,3/24/25, 8:05 AM TCEQ Class B Surface Water B test material -Exam 2025 update|comprehensive questions and verified answers (complete sol…
The texas drinking water requirements require a pH
What is texas drinking > 7.0 for the water treatment plant finished water.
water pH requirements? EPA requires that pH analysis be preformed within
15 minutes of the sample being caught.
When chlorine is added to water it forms
hypochlorous acid (HOCL) and hydrochloric acid
(OCL). The hypochlorous acid is the effective
disinfectant. At a pH of 4.0 there is 100%
How does pH affect hypochlorous acid. At a pH of 11 there is 100%
Chlorine activity? hypochlorite ion. At a pH of 7, the hypochlorous
acid is at about 80% and the hypochlorite ion makes
up about 20% of the chlorine content. The lower the
pH is more effective chlorine is because you have
more hypochlorous acid.
Stable water is defined as water that will neither
deposit or dissolve a calcium carbonate film or
scale. Since no water is stable indefinitely, chemical
treatment of water usually is intended to produce
What is meant by water
water that is slightly scale forming without being
stability?
liable to cause stoppages in small lines and
services. Bayliss curve is the simplest determination
of stability. The Langelier saturation index is also
used.
Corrosion protection for above ground tanks and
What/how are above piping is prevented by: cathodic protection, use if
ground tanks and piping protective linings/coatings, eliminating different
protected from types of metals in the distribution system, and
corrosion? treating the water with chemicals to make it less
corrosive
https://quizlet.com/1022036761/tceq-class-b-surface-water-b-test-material-exam-2025-updatecomprehensive-questions-and-verified-answers-co… 2/43
,3/24/25, 8:05 AM TCEQ Class B Surface Water B test material -Exam 2025 update|comprehensive questions and verified answers (complete sol…
The two tritiation methods of analysis are a standard
acid to titrate a sample. The end point of the titration
is determined by the following: an indicator that
changes color at a certain pH, or potentiometric
titration to end - point pH. Using either of the
How do you tests fir
methods, a measured amount of sample is titrated
alkalinity?
with a standard sulfuric acid to a predetermined pH.
Nomograph are a graphical form of determining
alkalinity. If the pH, total alkalinity, temperature and
total dissolved solids are known, any or all of the
alkalinity forms may be estimated.
Turbidity can be described as a measure of the
relative clarity of water. Turbidity is an expression of
What is Turbidity? the optical property that causes light to be
scattered and absorbed rather than transmitted in
straight lines through the sample.
Turbidity is caused by clay, slit, finely divided
organic and inorganic material. Other suspended
What causes Turbidity? matter and microscopic organisms can also cause
turbidity. There is one approved method for running
turbidity - the Nephelometric Method (NTU)
The amount of chlorine used up to completely react
What is chlorine
with the water and its suspended or dissolve
Demand?
material
When all the demand of the water is met any
What is chlorine residual?
additional chlorine produces a chlorine residual
Demand plus residual is the chlorine dosage.
What is chlorine dosage?
Chlorine Dosage = Demand + Residual
Chlorine concentration and contact time determines
What determines rate of the rate and degree of disinfection. If concentration
disinfection? increases, the time can be reduced; if concentration
is reduced the time must be increased.
Chlorine effectiveness is greater at higher
How does temperature
temperatures, up to the point that chlorine volatizes.
effect chlorine
At low temperature, chlorine is more stable, but
effectiveness?
disinfection time increases.
https://quizlet.com/1022036761/tceq-class-b-surface-water-b-test-material-exam-2025-updatecomprehensive-questions-and-verified-answers-co… 3/43
, 3/24/25, 8:05 AM TCEQ Class B Surface Water B test material -Exam 2025 update|comprehensive questions and verified answers (complete sol…
Is removing turbidity Turbidity must be removed to low levels by
important for sedimentation and filtration to allow chlorine to
disinfection? contact pathogens.
What happens to Dissolved solids are oxidized on contact further
dissolved solids on reinforcing the importance of contact time.
contact with chlorine?
No residual is formed Manganese, iron, turbidity, organic matter, ammonia,
until reducing agents are or nitrates
destroyed. What are
examples of reducing
agents?
Stage 1: No residual is formed because inorganic
demand destroys the chlorine. (Flat Line)
Stage 2: Monochloramines are formed as chlorine
combines with organics containing ammonia (rising
curve). The chlorine to ammonia weight ratio at this
point is 5:1. Combined and total residual increases,
chloro-organics are formed.
What the 4 stages of the Stage 3: Increasing chlorine dosage (failing curve)
Chlorine Demand Curve to a chlorine/ammonia weight ratio of 7.6:1 destroys
chart? chloramines and chloro-organics. Combined
decreases and free chlorine increases.
Stage 4: Enough chlorine is added to reduce all
demand. The combined residual remains the same,
but free residual increases with dosage. This stage is
called "breakpoint" chlorination. The chlorine to
ammonia ratio of 10:1 satisfies all demand and
disinfects the distribution system. ( second rising
curve)
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TCEQ Class B Surface Water B test material -
Exam 2025 update|comprehensive questions
and verified answers (complete solutions)
ASSURED SUCCESS|GRADE A+!!
Save
Terms in this set (293)
What is the most It is the ability of the material to resist internal and
important factor affecting external corrosion
the useful life of service
lines?
When does Suction Head Suction head exists when the source of supply is
exist? above the centerline of the pump.
NPSH is the pressure under which water enters the
What is Net positive eye of the impeller in a centrifugal pump.
Suction Head (NPSH) Insufficient NPSH is the main cause of pump
cavitation
Chlorine Dioxide is a gas used in small quantities to
disinfect water. It does not react with organics to
form THMs and HAAs. It oxidizes phenols,
manganese, iron, sulfurous and organic compounds
Explain and expand on
which aids in the removal of tastes and odors. It is a
Chlorine Dioxide (what it
very effective bactericide and a superior virocide. It
reacts with, oxidizes, etc)
dies not combine with ammonia. Chlorine Dioxide
MRDL is .8 mg/L and monitoring procedures are the
same as for chlorine. The Chlorite MCL is .q mg/L
and must be monitored daily.
https://quizlet.com/1022036761/tceq-class-b-surface-water-b-test-material-exam-2025-updatecomprehensive-questions-and-verified-answers-co… 1/43
,3/24/25, 8:05 AM TCEQ Class B Surface Water B test material -Exam 2025 update|comprehensive questions and verified answers (complete sol…
The texas drinking water requirements require a pH
What is texas drinking > 7.0 for the water treatment plant finished water.
water pH requirements? EPA requires that pH analysis be preformed within
15 minutes of the sample being caught.
When chlorine is added to water it forms
hypochlorous acid (HOCL) and hydrochloric acid
(OCL). The hypochlorous acid is the effective
disinfectant. At a pH of 4.0 there is 100%
How does pH affect hypochlorous acid. At a pH of 11 there is 100%
Chlorine activity? hypochlorite ion. At a pH of 7, the hypochlorous
acid is at about 80% and the hypochlorite ion makes
up about 20% of the chlorine content. The lower the
pH is more effective chlorine is because you have
more hypochlorous acid.
Stable water is defined as water that will neither
deposit or dissolve a calcium carbonate film or
scale. Since no water is stable indefinitely, chemical
treatment of water usually is intended to produce
What is meant by water
water that is slightly scale forming without being
stability?
liable to cause stoppages in small lines and
services. Bayliss curve is the simplest determination
of stability. The Langelier saturation index is also
used.
Corrosion protection for above ground tanks and
What/how are above piping is prevented by: cathodic protection, use if
ground tanks and piping protective linings/coatings, eliminating different
protected from types of metals in the distribution system, and
corrosion? treating the water with chemicals to make it less
corrosive
https://quizlet.com/1022036761/tceq-class-b-surface-water-b-test-material-exam-2025-updatecomprehensive-questions-and-verified-answers-co… 2/43
,3/24/25, 8:05 AM TCEQ Class B Surface Water B test material -Exam 2025 update|comprehensive questions and verified answers (complete sol…
The two tritiation methods of analysis are a standard
acid to titrate a sample. The end point of the titration
is determined by the following: an indicator that
changes color at a certain pH, or potentiometric
titration to end - point pH. Using either of the
How do you tests fir
methods, a measured amount of sample is titrated
alkalinity?
with a standard sulfuric acid to a predetermined pH.
Nomograph are a graphical form of determining
alkalinity. If the pH, total alkalinity, temperature and
total dissolved solids are known, any or all of the
alkalinity forms may be estimated.
Turbidity can be described as a measure of the
relative clarity of water. Turbidity is an expression of
What is Turbidity? the optical property that causes light to be
scattered and absorbed rather than transmitted in
straight lines through the sample.
Turbidity is caused by clay, slit, finely divided
organic and inorganic material. Other suspended
What causes Turbidity? matter and microscopic organisms can also cause
turbidity. There is one approved method for running
turbidity - the Nephelometric Method (NTU)
The amount of chlorine used up to completely react
What is chlorine
with the water and its suspended or dissolve
Demand?
material
When all the demand of the water is met any
What is chlorine residual?
additional chlorine produces a chlorine residual
Demand plus residual is the chlorine dosage.
What is chlorine dosage?
Chlorine Dosage = Demand + Residual
Chlorine concentration and contact time determines
What determines rate of the rate and degree of disinfection. If concentration
disinfection? increases, the time can be reduced; if concentration
is reduced the time must be increased.
Chlorine effectiveness is greater at higher
How does temperature
temperatures, up to the point that chlorine volatizes.
effect chlorine
At low temperature, chlorine is more stable, but
effectiveness?
disinfection time increases.
https://quizlet.com/1022036761/tceq-class-b-surface-water-b-test-material-exam-2025-updatecomprehensive-questions-and-verified-answers-co… 3/43
, 3/24/25, 8:05 AM TCEQ Class B Surface Water B test material -Exam 2025 update|comprehensive questions and verified answers (complete sol…
Is removing turbidity Turbidity must be removed to low levels by
important for sedimentation and filtration to allow chlorine to
disinfection? contact pathogens.
What happens to Dissolved solids are oxidized on contact further
dissolved solids on reinforcing the importance of contact time.
contact with chlorine?
No residual is formed Manganese, iron, turbidity, organic matter, ammonia,
until reducing agents are or nitrates
destroyed. What are
examples of reducing
agents?
Stage 1: No residual is formed because inorganic
demand destroys the chlorine. (Flat Line)
Stage 2: Monochloramines are formed as chlorine
combines with organics containing ammonia (rising
curve). The chlorine to ammonia weight ratio at this
point is 5:1. Combined and total residual increases,
chloro-organics are formed.
What the 4 stages of the Stage 3: Increasing chlorine dosage (failing curve)
Chlorine Demand Curve to a chlorine/ammonia weight ratio of 7.6:1 destroys
chart? chloramines and chloro-organics. Combined
decreases and free chlorine increases.
Stage 4: Enough chlorine is added to reduce all
demand. The combined residual remains the same,
but free residual increases with dosage. This stage is
called "breakpoint" chlorination. The chlorine to
ammonia ratio of 10:1 satisfies all demand and
disinfects the distribution system. ( second rising
curve)
https://quizlet.com/1022036761/tceq-class-b-surface-water-b-test-material-exam-2025-updatecomprehensive-questions-and-verified-answers-co… 4/43
