TCEQ SURFACE WATER B LICENSE TEST BANK
LATEST 2026 BUNDLED EXAMS WITH
COMPLETE CORRECT SOLUTIONS FOR
GUARANTEED PASS
◉When does Suction Head exist? Answer: Suction head exists when the
source of supply is above the centerline of the pump.
◉What is Net positive Suction Head (NPSH) Answer: 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 with,
oxidizes, etc) Answer: 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 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? Answer: 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? Answer: 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? Answer: 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 protected from
corrosion? Answer: Corrosion protection for above ground tanks and
piping is prevented by: 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? Answer: 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? Answer: 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? Answer: 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? Answer: The amount of chlorine used up
to completely react with the water and its suspended or dissolve material
◉What is chlorine residual? Answer: When all the demand of the water
is met any additional chlorine produces a chlorine residual
, ◉What is chlorine dosage? Answer: Demand plus residual is the
chlorine dosage. Chlorine Dosage = Demand + Residual
◉What determines rate of disinfection? Answer: 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? Answer:
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? Answer: 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 chlorine? Answer:
Dissolved solids are oxidized on contact further reinforcing the
importance of contact time.
◉No residual is formed until reducing agents are destroyed. What are
examples of reducing agents? Answer: Manganese, iron, turbidity,
organic matter, ammonia, or nitrates
LATEST 2026 BUNDLED EXAMS WITH
COMPLETE CORRECT SOLUTIONS FOR
GUARANTEED PASS
◉When does Suction Head exist? Answer: Suction head exists when the
source of supply is above the centerline of the pump.
◉What is Net positive Suction Head (NPSH) Answer: 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 with,
oxidizes, etc) Answer: 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 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? Answer: 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? Answer: 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? Answer: 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 protected from
corrosion? Answer: Corrosion protection for above ground tanks and
piping is prevented by: 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? Answer: 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? Answer: 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? Answer: 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? Answer: The amount of chlorine used up
to completely react with the water and its suspended or dissolve material
◉What is chlorine residual? Answer: When all the demand of the water
is met any additional chlorine produces a chlorine residual
, ◉What is chlorine dosage? Answer: Demand plus residual is the
chlorine dosage. Chlorine Dosage = Demand + Residual
◉What determines rate of disinfection? Answer: 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? Answer:
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? Answer: 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 chlorine? Answer:
Dissolved solids are oxidized on contact further reinforcing the
importance of contact time.
◉No residual is formed until reducing agents are destroyed. What are
examples of reducing agents? Answer: Manganese, iron, turbidity,
organic matter, ammonia, or nitrates
