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TEXAS CLASS D WATER LICENSE 2025
UPDATED ACTUAL EXAM WITH CORRECT
SOLUTIONS.
What removes tastes, odors, and certain organics and gases,
and oxidizes iron and manganese? This process includes the
incorporation of air into the water by means of spray nozzles ,
steps or cascades, or trays of diffusers? - correct answer-
Aeration
TCEQ regulation states that Shore installations , marinas, boats
and houses on the watershed must have sewage? - correct
answer- disposal
Water aerated or chlorinated at proper pH levels oxidizes the
iron and manganese, turning them into solid? - correct answer-
particles
Well casing and cementing protect the well from collapse and
surface ? - correct answer- contamination
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Sequestering does not remove iron from the water, but
prevents it from combining with oxygen and? - correct answer-
reddening
The quantity of water a formation yields depends on the
formations thickness and? - correct answer- permeability
Cascade aerators, packed air-stripping towers, and air diffusers
are used to aerate? - correct answer- water
Aeration can be used to remove what from the water supply? -
correct answer- iron and manganese
Hydrogen sulfide has a rotten egg odor and is oxidized by? -
correct answer- super-chlorination
When Iron levels get this high, it can cause red stains on
clothing, colored water, or turbidity? - correct answer- 0.3 mg/L
Excess Manganese can cause? - correct answer- black stains
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Another method of iron control is the use of? - correct answer-
sequestering agents
What is a sequestering agent? - correct answer-
polyphosphates
Well water is sometimes? - correct answer- corrosive
Low ph, dissolved gases, high temperatures, and high mineral
levels can cause well water to be? - correct answer- corrosive
What is the process of removing calcium and magnesium by
adding lime or by exchanging ions? - correct answer- softening
An ion exchange replaces calcium ions with? - correct answer-
sodium ions
A process available for removing arsenic, fluoride, lead,
mercury, nitrate, and silver from raw water is? - correct answer-
coagulation followed by sedimentation and filtration
TEXAS CLASS D WATER LICENSE 2025
UPDATED ACTUAL EXAM WITH CORRECT
SOLUTIONS.
What removes tastes, odors, and certain organics and gases,
and oxidizes iron and manganese? This process includes the
incorporation of air into the water by means of spray nozzles ,
steps or cascades, or trays of diffusers? - correct answer-
Aeration
TCEQ regulation states that Shore installations , marinas, boats
and houses on the watershed must have sewage? - correct
answer- disposal
Water aerated or chlorinated at proper pH levels oxidizes the
iron and manganese, turning them into solid? - correct answer-
particles
Well casing and cementing protect the well from collapse and
surface ? - correct answer- contamination
,2 | Page
Sequestering does not remove iron from the water, but
prevents it from combining with oxygen and? - correct answer-
reddening
The quantity of water a formation yields depends on the
formations thickness and? - correct answer- permeability
Cascade aerators, packed air-stripping towers, and air diffusers
are used to aerate? - correct answer- water
Aeration can be used to remove what from the water supply? -
correct answer- iron and manganese
Hydrogen sulfide has a rotten egg odor and is oxidized by? -
correct answer- super-chlorination
When Iron levels get this high, it can cause red stains on
clothing, colored water, or turbidity? - correct answer- 0.3 mg/L
Excess Manganese can cause? - correct answer- black stains
, 3 | Page
Another method of iron control is the use of? - correct answer-
sequestering agents
What is a sequestering agent? - correct answer-
polyphosphates
Well water is sometimes? - correct answer- corrosive
Low ph, dissolved gases, high temperatures, and high mineral
levels can cause well water to be? - correct answer- corrosive
What is the process of removing calcium and magnesium by
adding lime or by exchanging ions? - correct answer- softening
An ion exchange replaces calcium ions with? - correct answer-
sodium ions
A process available for removing arsenic, fluoride, lead,
mercury, nitrate, and silver from raw water is? - correct answer-
coagulation followed by sedimentation and filtration
