TCEQ CLASS D WATER LICENSE EXAM
2024-2025 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |FREQUENTLY TESTED
QUESTIONS AND SOLUTIONS |ALREADY
GRADED A+|BRAND
NEW!!|GUARANTEED PASS |LATEST
UPDATE
Three ways to measure water levels is the wetted tape, electric sounder, and the ______.
airline (most often used)
A well drilled into a water table aquifer is usually a ______ well.
Shallow
Abandoned wells, not plugged, within ___ mile of a proposed well site must be reported to TCEQ.
1/4
The State requires wells be protected by ______-______ fences or locked well houses.
Intruder-resistant
Groundwater is usually clear and void of __________.
bacteria
TCEQ defines "complete treatment" as the following sequence of processes: pretreatment disinfection,
taste and odor control, continuous coagulation, filtration, sedimentation, terminal disinfection, and
covered storage.
False
(1. Pretreatment disinfection
2. Taste and odor control
3. Continuous coagulation
4. Sedimentation
1|Page
,5. Filtration
6. Terminal disinfection
7. Covered storage)
T/F: Most solids should be removed in the filtration step.
False (Sedimentation)
T/F: TCEQ requires filtered water to be 0.3 NTUs or less in at least 95% of measurements each month.
True
Destratification is the mixing of lake water by compressed air to prevent layers of different __________
from developing.
temperature
All PWS in Texas are required to use ________ as the final disinfectant.
chlorine
T/F: Powdered activated carbon (PAC) is commonly used to treat iron and manganese.
False (removes the tastes and odors usually caused by dead and decaying algae and vegetation)
A restricted zone of ______ ft radius from the raw water intake must be established and recreational
activities and trespassing shall be prohibited.
200
T/F: The Rio Grande River is the longest river in Texas, stretching 250 miles along the Mexico border.
False (1250 miles)
T/F: Filtration is the first step in the removal of suspended solids.
False (Sedimentation)
Surface water is usually low in ________ and ________.
minerals / gases
Chemical dosage, water temperature, pH, _______, and the characteristics of the raw water all have an
effect on the coagulation process.
mixing
The two pathogenic protozoans resistant to chlorination are: ________ and _________
giardia / cryptosporidium
T/F: Bacteria, algae, and turbidity can be a problem in surface water as can be municipal, industrial and
agricultural pollution.
True
2|Page
, T/F: Coagulation works by the bonding of negatively charged turbidity to positively charged chemical
coagulants.
True
T/F: Turbidity can shelter bacteria from the disinfection process.
True
_______ is the last treatment step before storage.
Disinfection
T/F: Treated water is stored at the plant in a tank called a clear well.
True
The process of separating floc from water by gravity is called: __________
sedimentation
Filtration is the last barrier between the public and _______ or ________.
giardia / cryptosporidium
T/F: If the media collects in the wash water troughs, the wash rate is too high.
True
T/F: A check valve located on the discharge side of a pump is an isolating valve that allows water to flow
one direction only.
False (it is a controlling valve)
T/F: The total dynamic head a pump must overcome is the distance from the water level on the suction
side of the pump to the top of the water level on the discharge side of the pump and includes any
friction and head loss encountered.
True
Dead-end mains must be provided with ________
Flush valves
T/F: Common cross connections include a garden hose connected to a potable water source and
submerged in a stock tank, a home served by a city water supply and private well, and a chemical
container connected to a potable water supply.
True
T/F: If a repaired main must be returned to service quickly, does with 50 mg/L for 30 minutes.
False (500 mg/L)
T/F: TCEQ requires at least 1 BacT sample for each 1000 ft of new main.
3|Page
2024-2025 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |FREQUENTLY TESTED
QUESTIONS AND SOLUTIONS |ALREADY
GRADED A+|BRAND
NEW!!|GUARANTEED PASS |LATEST
UPDATE
Three ways to measure water levels is the wetted tape, electric sounder, and the ______.
airline (most often used)
A well drilled into a water table aquifer is usually a ______ well.
Shallow
Abandoned wells, not plugged, within ___ mile of a proposed well site must be reported to TCEQ.
1/4
The State requires wells be protected by ______-______ fences or locked well houses.
Intruder-resistant
Groundwater is usually clear and void of __________.
bacteria
TCEQ defines "complete treatment" as the following sequence of processes: pretreatment disinfection,
taste and odor control, continuous coagulation, filtration, sedimentation, terminal disinfection, and
covered storage.
False
(1. Pretreatment disinfection
2. Taste and odor control
3. Continuous coagulation
4. Sedimentation
1|Page
,5. Filtration
6. Terminal disinfection
7. Covered storage)
T/F: Most solids should be removed in the filtration step.
False (Sedimentation)
T/F: TCEQ requires filtered water to be 0.3 NTUs or less in at least 95% of measurements each month.
True
Destratification is the mixing of lake water by compressed air to prevent layers of different __________
from developing.
temperature
All PWS in Texas are required to use ________ as the final disinfectant.
chlorine
T/F: Powdered activated carbon (PAC) is commonly used to treat iron and manganese.
False (removes the tastes and odors usually caused by dead and decaying algae and vegetation)
A restricted zone of ______ ft radius from the raw water intake must be established and recreational
activities and trespassing shall be prohibited.
200
T/F: The Rio Grande River is the longest river in Texas, stretching 250 miles along the Mexico border.
False (1250 miles)
T/F: Filtration is the first step in the removal of suspended solids.
False (Sedimentation)
Surface water is usually low in ________ and ________.
minerals / gases
Chemical dosage, water temperature, pH, _______, and the characteristics of the raw water all have an
effect on the coagulation process.
mixing
The two pathogenic protozoans resistant to chlorination are: ________ and _________
giardia / cryptosporidium
T/F: Bacteria, algae, and turbidity can be a problem in surface water as can be municipal, industrial and
agricultural pollution.
True
2|Page
, T/F: Coagulation works by the bonding of negatively charged turbidity to positively charged chemical
coagulants.
True
T/F: Turbidity can shelter bacteria from the disinfection process.
True
_______ is the last treatment step before storage.
Disinfection
T/F: Treated water is stored at the plant in a tank called a clear well.
True
The process of separating floc from water by gravity is called: __________
sedimentation
Filtration is the last barrier between the public and _______ or ________.
giardia / cryptosporidium
T/F: If the media collects in the wash water troughs, the wash rate is too high.
True
T/F: A check valve located on the discharge side of a pump is an isolating valve that allows water to flow
one direction only.
False (it is a controlling valve)
T/F: The total dynamic head a pump must overcome is the distance from the water level on the suction
side of the pump to the top of the water level on the discharge side of the pump and includes any
friction and head loss encountered.
True
Dead-end mains must be provided with ________
Flush valves
T/F: Common cross connections include a garden hose connected to a potable water source and
submerged in a stock tank, a home served by a city water supply and private well, and a chemical
container connected to a potable water supply.
True
T/F: If a repaired main must be returned to service quickly, does with 50 mg/L for 30 minutes.
False (500 mg/L)
T/F: TCEQ requires at least 1 BacT sample for each 1000 ft of new main.
3|Page
