TCEQ Class B Surface Water B test Material Latest Exam B
test material - TCEQ Class B Surface Water 2026
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Terms in this set (293)
What is the most important factor affecting the useful It is the ability of the material to resist internal and external corrosion
life of service lines?
When does Suction Head exist? Suction head exists when the source of supply is above the centerline of the
pump.
What is Net positive Suction Head (NPSH) NPSH is the pressure under which water enters the eye of the impeller in a
centrifugal pump. Insufficient NPSH is the main cause of pump cavitation
Explain and expand on Chlorine Dioxide (what it reacts Chlorine Dioxide is a gas used in small quantities to disinfect water. It does not
with, oxidizes, etc) react with organics to form THMs and HAAs. It oxidizes phenols, manganese,
iron, sulfurous and organic compounds which aids in the removal of tastes and
odors. It is a very effective bactericide and a superior virocide. It 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.
What is texas drinking water pH requirements? The texas drinking water requirements require a pH > 7.0 for the water
treatment plant finished water. EPA requires that pH analysis be preformed
within 15 minutes of the sample being caught.
How does pH affect Chlorine activity? 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% hypochlorous acid. At a pH of 11 there is 100%
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.
, What is meant by water stability? 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 water that is slightly scale forming
without being liable to cause stoppages in small lines and services. Bayliss
curve is the simplest determination of stability. The Langelier saturation index is
also used.
What/how are above ground tanks and piping Corrosion protection for above ground tanks and piping is prevented by:
protected from corrosion? cathodic protection, use if protective linings/coatings, eliminating different
types of metals in the distribution system, and treating the water with chemicals
to make it less corrosive
How do you tests fir alkalinity? 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 methods, a measured amount of sample is titrated 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.
What is Turbidity? Turbidity can be described as a measure of the relative clarity of water.
Turbidity is an expression of the optical property that causes light to be
scattered and absorbed rather than transmitted in straight lines through the
sample.
What causes Turbidity? Turbidity is caused by clay, slit, finely divided organic and inorganic material.
Other suspended matter and microscopic organisms can also cause turbidity.
There is one approved method for running turbidity - the Nephelometric
Method (NTU)
What is chlorine Demand? The amount of chlorine used up to completely react with the water and its
suspended or dissolve material
What is chlorine residual? When all the demand of the water is met any additional chlorine produces a
chlorine residual
What is chlorine dosage? Demand plus residual is the chlorine dosage. Chlorine Dosage = Demand +
Residual
What determines rate of disinfection? Chlorine concentration and contact time determines the rate and degree of
disinfection. If concentration increases, the time can be reduced; if
concentration is reduced the time must be increased.
How does temperature effect chlorine effectiveness? Chlorine effectiveness is greater at higher temperatures, up to the point that
chlorine volatizes. At low temperature, chlorine is more stable, but disinfection
time increases.
Is removing turbidity important for disinfection? Turbidity must be removed to low levels by sedimentation and filtration to
allow chlorine to contact pathogens.
What happens to dissolved solids on contact with Dissolved solids are oxidized on contact further reinforcing the importance of
chlorine? contact time.
No residual is formed until reducing agents are Manganese, iron, turbidity, organic matter, ammonia, or nitrates
destroyed. What are examples of reducing agents?
test material - TCEQ Class B Surface Water 2026
Leave the first rating
Save
Students also studied
WSET LEVEL 4 D2 EXAM comprehe... IICRC FSRT Exam Study Guide Com... FNPS 3680 Exam 2 Ch
Teacher 302 terms Teacher 121 terms Teacher 120 terms Te
plibraryspeed Preview Theatre416 Preview joshuawesonga752 Preview
Terms in this set (293)
What is the most important factor affecting the useful It is the ability of the material to resist internal and external corrosion
life of service lines?
When does Suction Head exist? Suction head exists when the source of supply is above the centerline of the
pump.
What is Net positive Suction Head (NPSH) NPSH is the pressure under which water enters the eye of the impeller in a
centrifugal pump. Insufficient NPSH is the main cause of pump cavitation
Explain and expand on Chlorine Dioxide (what it reacts Chlorine Dioxide is a gas used in small quantities to disinfect water. It does not
with, oxidizes, etc) react with organics to form THMs and HAAs. It oxidizes phenols, manganese,
iron, sulfurous and organic compounds which aids in the removal of tastes and
odors. It is a very effective bactericide and a superior virocide. It 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.
What is texas drinking water pH requirements? The texas drinking water requirements require a pH > 7.0 for the water
treatment plant finished water. EPA requires that pH analysis be preformed
within 15 minutes of the sample being caught.
How does pH affect Chlorine activity? 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% hypochlorous acid. At a pH of 11 there is 100%
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.
, What is meant by water stability? 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 water that is slightly scale forming
without being liable to cause stoppages in small lines and services. Bayliss
curve is the simplest determination of stability. The Langelier saturation index is
also used.
What/how are above ground tanks and piping Corrosion protection for above ground tanks and piping is prevented by:
protected from corrosion? cathodic protection, use if protective linings/coatings, eliminating different
types of metals in the distribution system, and treating the water with chemicals
to make it less corrosive
How do you tests fir alkalinity? 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 methods, a measured amount of sample is titrated 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.
What is Turbidity? Turbidity can be described as a measure of the relative clarity of water.
Turbidity is an expression of the optical property that causes light to be
scattered and absorbed rather than transmitted in straight lines through the
sample.
What causes Turbidity? Turbidity is caused by clay, slit, finely divided organic and inorganic material.
Other suspended matter and microscopic organisms can also cause turbidity.
There is one approved method for running turbidity - the Nephelometric
Method (NTU)
What is chlorine Demand? The amount of chlorine used up to completely react with the water and its
suspended or dissolve material
What is chlorine residual? When all the demand of the water is met any additional chlorine produces a
chlorine residual
What is chlorine dosage? Demand plus residual is the chlorine dosage. Chlorine Dosage = Demand +
Residual
What determines rate of disinfection? Chlorine concentration and contact time determines the rate and degree of
disinfection. If concentration increases, the time can be reduced; if
concentration is reduced the time must be increased.
How does temperature effect chlorine effectiveness? Chlorine effectiveness is greater at higher temperatures, up to the point that
chlorine volatizes. At low temperature, chlorine is more stable, but disinfection
time increases.
Is removing turbidity important for disinfection? Turbidity must be removed to low levels by sedimentation and filtration to
allow chlorine to contact pathogens.
What happens to dissolved solids on contact with Dissolved solids are oxidized on contact further reinforcing the importance of
chlorine? contact time.
No residual is formed until reducing agents are Manganese, iron, turbidity, organic matter, ammonia, or nitrates
destroyed. What are examples of reducing agents?
