Page |1
TCEQ CLASS B SURFACE WATER B TEST
MATERIAL –EXAM 2025 WITH 100% VERIFIED
QUESTIONS AND EXPERT SOLUTIONS|
GUARANTEED VALUE AND SUCCESS.
1. What does the Texas Hazard Communication Act require an employer
to provide to the employees? - correct answer - The Texas Hazards
Communication act requires employers to provide information and
training to employees on the hazards of chemicals that they use or work
with.
2. An employee will not follow safety rules and feels like they do not have
to followed. What should an employer do? - correct answer - Document
employee's actions and counsel employee. If he does not respond
discharge him.
3. What is one method of ensuring safety in a trench or excavation? -
correct answer - One method of ensuring safety and health of workers in
a trench or excavation is to slope the sides of the cut to the "angle of
repose", or the angle closet to the perpendicular at which the soil will
remain at rest without shoring. Angle of repose is determined by soil
type and ditch conditions.
4. What is the minimum width for any ditch with workers? - correct answer -
The minimum width for any ditch in which workers must work is 18
inches. A ditch for water main construction should be at least 12 inches
wider than the outside pipe diameter. Ditch should be as narrow as
, Page |2
practical to prevent excessive trench load on the pipe. The wider the
trench, the more trench load is placed on the pipe.
5. What causes most underground pipe failures? - correct answer - 90% of
underground pipe failures are related to improper backfill and lack of
proper bedding.
6. An operator hears pinging in the pump. What is causing this? - correct
answer - Cavitation, caused by formation and collapse of bubbles in the
water which causes noise and vibration. Pitting of metal may result if
cavitation is not eliminated.
7. What does a check valve on the pump discharge do? - correct answer -
A check valve on the pump discharge of a pump prevents back-flow.
8. Customer complains about low water pressure. What should operator
do? - correct answer - All complaints should be throughly checked out
by a representative of the municipality who can deal with the public in a
calm and dignified manner. Some causes of low water pressure are
clogged screens on faucets, a lean or break in the area, flushing of
water mains, build up in pipes or meter, a partially closed valve, heavy
water use during summer and fire rescue.
9. What is the quality of raw water affected by? - correct answer - The
quality of raw water in any geographic locality is determined primarily by
, Page |3
natural factors such as geology, topography, and climate in each
locality.
10. What is the most important factor affecting the useful life of service
lines? - correct answer - It is the ability of the material to resist internal
and external corrosion
11. When does Suction Head exist? - correct answer - Suction head
exists when the source of supply is above the centerline of the pump.
12. What is Net positive Suction Head (NPSH) - correct 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
13. Explain and expand on Chlorine Dioxide (what it reacts with, oxidizes,
etc) - correct 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.
, Page |4
14. What is texas drinking water pH requirements? - correct 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.
15. How does pH affect Chlorine activity? - correct 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.
16. What is meant by water stability? - correct 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.
17. What/how are above ground tanks and piping protected from
corrosion? - correct 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
TCEQ CLASS B SURFACE WATER B TEST
MATERIAL –EXAM 2025 WITH 100% VERIFIED
QUESTIONS AND EXPERT SOLUTIONS|
GUARANTEED VALUE AND SUCCESS.
1. What does the Texas Hazard Communication Act require an employer
to provide to the employees? - correct answer - The Texas Hazards
Communication act requires employers to provide information and
training to employees on the hazards of chemicals that they use or work
with.
2. An employee will not follow safety rules and feels like they do not have
to followed. What should an employer do? - correct answer - Document
employee's actions and counsel employee. If he does not respond
discharge him.
3. What is one method of ensuring safety in a trench or excavation? -
correct answer - One method of ensuring safety and health of workers in
a trench or excavation is to slope the sides of the cut to the "angle of
repose", or the angle closet to the perpendicular at which the soil will
remain at rest without shoring. Angle of repose is determined by soil
type and ditch conditions.
4. What is the minimum width for any ditch with workers? - correct answer -
The minimum width for any ditch in which workers must work is 18
inches. A ditch for water main construction should be at least 12 inches
wider than the outside pipe diameter. Ditch should be as narrow as
, Page |2
practical to prevent excessive trench load on the pipe. The wider the
trench, the more trench load is placed on the pipe.
5. What causes most underground pipe failures? - correct answer - 90% of
underground pipe failures are related to improper backfill and lack of
proper bedding.
6. An operator hears pinging in the pump. What is causing this? - correct
answer - Cavitation, caused by formation and collapse of bubbles in the
water which causes noise and vibration. Pitting of metal may result if
cavitation is not eliminated.
7. What does a check valve on the pump discharge do? - correct answer -
A check valve on the pump discharge of a pump prevents back-flow.
8. Customer complains about low water pressure. What should operator
do? - correct answer - All complaints should be throughly checked out
by a representative of the municipality who can deal with the public in a
calm and dignified manner. Some causes of low water pressure are
clogged screens on faucets, a lean or break in the area, flushing of
water mains, build up in pipes or meter, a partially closed valve, heavy
water use during summer and fire rescue.
9. What is the quality of raw water affected by? - correct answer - The
quality of raw water in any geographic locality is determined primarily by
, Page |3
natural factors such as geology, topography, and climate in each
locality.
10. What is the most important factor affecting the useful life of service
lines? - correct answer - It is the ability of the material to resist internal
and external corrosion
11. When does Suction Head exist? - correct answer - Suction head
exists when the source of supply is above the centerline of the pump.
12. What is Net positive Suction Head (NPSH) - correct 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
13. Explain and expand on Chlorine Dioxide (what it reacts with, oxidizes,
etc) - correct 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.
, Page |4
14. What is texas drinking water pH requirements? - correct 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.
15. How does pH affect Chlorine activity? - correct 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.
16. What is meant by water stability? - correct 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.
17. What/how are above ground tanks and piping protected from
corrosion? - correct 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
