TCEQ Class B Surface Water B test
material -Exam 2025 update |
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Terms in this set (293)
What is the It is the ability of the material to
most important resist internal and external
factor affecting corrosion
the useful life of
service lines?
,When does Suction head exists when the
Suction Head source of supply is above the
exist? centerline of the pump.
NPSH is the pressure under which
What is Net water enters the eye of the
positive Suction impeller in a centrifugal pump.
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,
Explain and
sulfurous and organic compounds
expand on
which aids in the removal of tastes
Chlorine
and odors. It is a very effective
Dioxide (what it
bactericide and a superior virocide.
reacts with,
It dies not combine with ammonia.
oxidizes, etc)
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.
, The texas drinking water
What is texas requirements require a pH > 7.0 for
drinking water the water treatment plant finished
pH water. EPA requires that pH analysis
requirements? 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% hypochlorous acid. At a pH of
How does pH
11 there is 100% hypochlorite ion. At
affect Chlorine
a pH of 7, the hypochlorous acid is
activity?
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
What is meant
is intended to produce water that is
by water
slightly scale forming without
stability?
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.
Corrosion protection for above
ground tanks and piping is
What/how are
prevented by: cathodic protection,
above ground
use if protective linings/coatings,
tanks and piping
eliminating different types of
protected from
metals in the distribution system,
corrosion?
and treating the water with
chemicals to make it less corrosive
material -Exam 2025 update |
comprehensive questions and
verified answers (complete
solutions) ASSURED
SUCCESS|GRADE A+!!
Save
Terms in this set (293)
What is the It is the ability of the material to
most important resist internal and external
factor affecting corrosion
the useful life of
service lines?
,When does Suction head exists when the
Suction Head source of supply is above the
exist? centerline of the pump.
NPSH is the pressure under which
What is Net water enters the eye of the
positive Suction impeller in a centrifugal pump.
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,
Explain and
sulfurous and organic compounds
expand on
which aids in the removal of tastes
Chlorine
and odors. It is a very effective
Dioxide (what it
bactericide and a superior virocide.
reacts with,
It dies not combine with ammonia.
oxidizes, etc)
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.
, The texas drinking water
What is texas requirements require a pH > 7.0 for
drinking water the water treatment plant finished
pH water. EPA requires that pH analysis
requirements? 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% hypochlorous acid. At a pH of
How does pH
11 there is 100% hypochlorite ion. At
affect Chlorine
a pH of 7, the hypochlorous acid is
activity?
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
What is meant
is intended to produce water that is
by water
slightly scale forming without
stability?
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.
Corrosion protection for above
ground tanks and piping is
What/how are
prevented by: cathodic protection,
above ground
use if protective linings/coatings,
tanks and piping
eliminating different types of
protected from
metals in the distribution system,
corrosion?
and treating the water with
chemicals to make it less corrosive
