TEXAS CLASS D WATER LICENSE FINAL
EXAM 2026 EXAM ACCURATE ACTUAL
EXAM / FREQUENTLY TESTED QUESTIONS
WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A | LATEST
UPDATE
Underground fuel tanks and septic drainage fields must be
at least ________ feet from a public well. -
....ANSWER...150 feet
Feedlots, sewage treatment plants, and landfills must be at
least ________ feet from a public well. - ....ANSWER...500
feet
A well may be developed by surging, overpumping,
jetting, and ________. - ....ANSWER...backwashing
To disinfect a new well, a chlorine dosage of at least
________ mg/L of chlorine is required. - ....ANSWER...50
mg/L
,Changes in well water levels or the volume of water
produced can alert the operator to a drop in the water
table, screen stoppage, or damage to the ________. -
....ANSWER...pump
Common deep well pumps include the ________ and the
vertical turbine. - ....ANSWER...submersible
Gases such as methane, carbon dioxide, and hydrogen
sulfide are reduced by ________. - ....ANSWER...aeration
Water from rivers, lakes, and reservoirs is called _____. -
....ANSWER...surface water
_____% of public water systems use surface water. -
....ANSWER...40%
Boat ramps, marinas, and docks should not be located
within _____ feet of a water intake. - ....ANSWER...1,000
feet
,Surface water contains bacteria, algae, and turbidity, but
is low in minerals, gases, and dissolved solids. (true/false) -
....ANSWER...true
The objectives of water treatment are protecting of public
health, supplying an aesthetically pleasing product, and
_____. - ....ANSWER...protecting consumer property
The _____ requires surface water to have pretreatment,
pre-disinfection, taste and odor control, coagulation,
sedimentation, filtration, covered storage, and terminal
disinfection. - ....ANSWER...TCEQ
Methods for controlling taste and odor problems are
_____, algae control, aeration, chemical oxidation, and
activated carbon. - ....ANSWER...lake destratification
One of the causes of taste and odor problems is _____ and
_____. - ....ANSWER...algae and bacteria
Coagulants are sodium aluminate, aluminum sulfate,
ferrous sulfate, and sodium chloride. (true/false) -
....ANSWER...false (sodium chloride is table salt)
, _____ cause small particles in water to clot together
forming floc, and this process, flocculation, forms larger
particles that settle more readily. -
....ANSWER...Coagulants
_____ tests help the operator determine the chemical and
dosage to apply. - ....ANSWER...Jar tests
Turbidity, pH, temperature, alkalinity, and chemical
dosage affect _____. - ....ANSWER...coagulation
To remove suspended solids and chlorine-resistant
microorganisms, surface water must be disinfected.
(true/false) - ....ANSWER...false (it must be filtered)
_____ is the final step in removing suspended matter and
chlorine-resistant microorganisms. -
....ANSWER...Filtering
EXAM 2026 EXAM ACCURATE ACTUAL
EXAM / FREQUENTLY TESTED QUESTIONS
WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A | LATEST
UPDATE
Underground fuel tanks and septic drainage fields must be
at least ________ feet from a public well. -
....ANSWER...150 feet
Feedlots, sewage treatment plants, and landfills must be at
least ________ feet from a public well. - ....ANSWER...500
feet
A well may be developed by surging, overpumping,
jetting, and ________. - ....ANSWER...backwashing
To disinfect a new well, a chlorine dosage of at least
________ mg/L of chlorine is required. - ....ANSWER...50
mg/L
,Changes in well water levels or the volume of water
produced can alert the operator to a drop in the water
table, screen stoppage, or damage to the ________. -
....ANSWER...pump
Common deep well pumps include the ________ and the
vertical turbine. - ....ANSWER...submersible
Gases such as methane, carbon dioxide, and hydrogen
sulfide are reduced by ________. - ....ANSWER...aeration
Water from rivers, lakes, and reservoirs is called _____. -
....ANSWER...surface water
_____% of public water systems use surface water. -
....ANSWER...40%
Boat ramps, marinas, and docks should not be located
within _____ feet of a water intake. - ....ANSWER...1,000
feet
,Surface water contains bacteria, algae, and turbidity, but
is low in minerals, gases, and dissolved solids. (true/false) -
....ANSWER...true
The objectives of water treatment are protecting of public
health, supplying an aesthetically pleasing product, and
_____. - ....ANSWER...protecting consumer property
The _____ requires surface water to have pretreatment,
pre-disinfection, taste and odor control, coagulation,
sedimentation, filtration, covered storage, and terminal
disinfection. - ....ANSWER...TCEQ
Methods for controlling taste and odor problems are
_____, algae control, aeration, chemical oxidation, and
activated carbon. - ....ANSWER...lake destratification
One of the causes of taste and odor problems is _____ and
_____. - ....ANSWER...algae and bacteria
Coagulants are sodium aluminate, aluminum sulfate,
ferrous sulfate, and sodium chloride. (true/false) -
....ANSWER...false (sodium chloride is table salt)
, _____ cause small particles in water to clot together
forming floc, and this process, flocculation, forms larger
particles that settle more readily. -
....ANSWER...Coagulants
_____ tests help the operator determine the chemical and
dosage to apply. - ....ANSWER...Jar tests
Turbidity, pH, temperature, alkalinity, and chemical
dosage affect _____. - ....ANSWER...coagulation
To remove suspended solids and chlorine-resistant
microorganisms, surface water must be disinfected.
(true/false) - ....ANSWER...false (it must be filtered)
_____ is the final step in removing suspended matter and
chlorine-resistant microorganisms. -
....ANSWER...Filtering
