Class D Water Operator License Exam TCEQ || Most
Recent Exam 2026-2027 Actual Complete Real Exam
Questions And Correct Answers (Verified Answers)
Already Graded A+ | Guaranteed Success!! Newest
Exam | Just Released!!
Three ways to measure water levels is the wetted tape, electric
sounder, and
the ______. - ANSWER-airline (most
often used)
A well drilled into a water table aquifer is usually a ______
well. - ANSWER-
Shallow
Abandoned wells, not plugged, within ___ mile of a proposed
well site must be
reported to TCEQ. -
ANSWER-1/4
The State requires wells be protected by ______-______ fences
or locked well
houses. - ANSWER-Intruder-
resistant
,Groundwater is usually clear and void of __________. -
ANSWER-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. – ANSWER-False
(1. Pretreatment disinfection
2. Taste and odor control
3. Continuous coagulation
*4. Sedimentation*
*5. Filtration*
6. Terminal disinfection
7. Covered storage)
T/F: Most solids should be removed in the filtration step. -
ANSWER-False
(Sedimentation)
T/F: TCEQ requires filtered water to be 0.3 NTUs or less in
at least 95% of
measurements each month. -
ANSWER-True
Destratification is the mixing of lake water by compressed air
to prevent layers
of different __________ from developing. - ANSWER-
temperature
,All PWS in Texas are required to use ________ as the final
disinfectant. -
ANSWER-
chlorine
T/F: Powdered activated carbon (PAC) is commonly used to
treat iron and manganese. - ANSWER-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. -
ANSWER-200
T/F: The Rio Grande River is the longest river in Texas,
stretching 250 miles
along the Mexico border. - ANSWER-False
(1250 miles)
T/F: Filtration is the first step in the removal of suspended
solids. - ANSWER-
False
(Sedimentation)
Surface water is usually low in ________ and ________. -
ANSWER-minerals /
gases
, Chemical dosage, water temperature, pH, _______, and the
characteristics of the raw water all have an effect on the
coagulation process. - ANSWER-mixing
The two pathogenic protozoans resistant to chlorination are:
________ and
_________ - ANSWER-giardia /
cryptosporidium
T/F: Bacteria, algae, and turbidity can be a problem in surface
water as can be
municipal, industrial and agricultural pollution. -
ANSWER-True
T/F: Coagulation works by the bonding of negatively
charged turbidity to
positively charged chemical coagulants. -
ANSWER-True
T/F: Turbidity can shelter bacteria from the disinfection
process. - ANSWER-
True
_______ is the last treatment step before storage. - ANSWER-
Disinfection
T/F: Treated water is stored at the plant in a tank called
a clear well. -
Recent Exam 2026-2027 Actual Complete Real Exam
Questions And Correct Answers (Verified Answers)
Already Graded A+ | Guaranteed Success!! Newest
Exam | Just Released!!
Three ways to measure water levels is the wetted tape, electric
sounder, and
the ______. - ANSWER-airline (most
often used)
A well drilled into a water table aquifer is usually a ______
well. - ANSWER-
Shallow
Abandoned wells, not plugged, within ___ mile of a proposed
well site must be
reported to TCEQ. -
ANSWER-1/4
The State requires wells be protected by ______-______ fences
or locked well
houses. - ANSWER-Intruder-
resistant
,Groundwater is usually clear and void of __________. -
ANSWER-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. – ANSWER-False
(1. Pretreatment disinfection
2. Taste and odor control
3. Continuous coagulation
*4. Sedimentation*
*5. Filtration*
6. Terminal disinfection
7. Covered storage)
T/F: Most solids should be removed in the filtration step. -
ANSWER-False
(Sedimentation)
T/F: TCEQ requires filtered water to be 0.3 NTUs or less in
at least 95% of
measurements each month. -
ANSWER-True
Destratification is the mixing of lake water by compressed air
to prevent layers
of different __________ from developing. - ANSWER-
temperature
,All PWS in Texas are required to use ________ as the final
disinfectant. -
ANSWER-
chlorine
T/F: Powdered activated carbon (PAC) is commonly used to
treat iron and manganese. - ANSWER-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. -
ANSWER-200
T/F: The Rio Grande River is the longest river in Texas,
stretching 250 miles
along the Mexico border. - ANSWER-False
(1250 miles)
T/F: Filtration is the first step in the removal of suspended
solids. - ANSWER-
False
(Sedimentation)
Surface water is usually low in ________ and ________. -
ANSWER-minerals /
gases
, Chemical dosage, water temperature, pH, _______, and the
characteristics of the raw water all have an effect on the
coagulation process. - ANSWER-mixing
The two pathogenic protozoans resistant to chlorination are:
________ and
_________ - ANSWER-giardia /
cryptosporidium
T/F: Bacteria, algae, and turbidity can be a problem in surface
water as can be
municipal, industrial and agricultural pollution. -
ANSWER-True
T/F: Coagulation works by the bonding of negatively
charged turbidity to
positively charged chemical coagulants. -
ANSWER-True
T/F: Turbidity can shelter bacteria from the disinfection
process. - ANSWER-
True
_______ is the last treatment step before storage. - ANSWER-
Disinfection
T/F: Treated water is stored at the plant in a tank called
a clear well. -
