CLASS D WATER LICENSE TEXAS EXAM REVIEW SOLVED QUESTIONS COMPLETE
ANSWERS GRADED A PLUS
Class D Water License Texas Final EXAM Paper
2026/2027 Questions and Answers Verified Solutions
Latest Update
Question:
TCEQ regulation states that Shore installations, marinas, boats and houses on the watershed must
have sewage?
Answer:
disposal
Question:
Water aerated or chlorinated at proper pH levels oxidizes the iron and manganese, turning them into
solid?
Answer:
particles
Question:
Well casing and cementing protect the well from collapse and surface?
Answer:
contamination
Question:
Sequestering does not remove iron from the water, but prevents it from combining with oxygen and?
Answer:
reddening
,Question:
The quantity of water a formation yields depends on the formations thickness and?
Answer:
permeability
Question:
Cascade aerators, packed air-stripping towers, and air diffusers are used to aerate?
Answer:
water
Question:
Aeration can be used to remove what from the water supply?
Answer:
iron and manganese
Question:
Hydrogen sulfide has a rotten egg odor and is oxidized by?
Answer:
super-chlorination
Question:
When Iron levels get this high, it can cause red stains on clothing, colored water, or turbidity?
Answer:
0.3 mg/L
Question:
,Excess Manganese can cause?
Answer:
black stains
Question:
Another method of iron control is the use of?
Answer:
sequestering agents
Question:
What is a sequestering agent?
Answer:
polyphosphates
Question:
Well water is sometimes?
Answer:
corrosive
Question:
Low ph, dissolved gases, high temperatures, and high mineral levels can cause well water to be?
Answer:
corrosive
Question:
What is the process of removing calcium and magnesium by adding lime or by exchanging ions?
, Answer:
softening
Question:
An ion exchange replaces calcium ions with?
Answer:
sodium ions
Question:
A process available for removing arsenic, fluoride, lead, mercury, nitrate, and silver from raw water
is?
Answer:
coagulation followed by sedimentation and filtration
Question:
A process that forces water through a membrane is?
Answer:
reverse osmosis
Question:
In reverse osmosis a sheet of synthetic material (membrane) under pressure prevents passage of
dissolved materials and larger particles and ejects them in a?
Answer:
waste stream
Question:
ANSWERS GRADED A PLUS
Class D Water License Texas Final EXAM Paper
2026/2027 Questions and Answers Verified Solutions
Latest Update
Question:
TCEQ regulation states that Shore installations, marinas, boats and houses on the watershed must
have sewage?
Answer:
disposal
Question:
Water aerated or chlorinated at proper pH levels oxidizes the iron and manganese, turning them into
solid?
Answer:
particles
Question:
Well casing and cementing protect the well from collapse and surface?
Answer:
contamination
Question:
Sequestering does not remove iron from the water, but prevents it from combining with oxygen and?
Answer:
reddening
,Question:
The quantity of water a formation yields depends on the formations thickness and?
Answer:
permeability
Question:
Cascade aerators, packed air-stripping towers, and air diffusers are used to aerate?
Answer:
water
Question:
Aeration can be used to remove what from the water supply?
Answer:
iron and manganese
Question:
Hydrogen sulfide has a rotten egg odor and is oxidized by?
Answer:
super-chlorination
Question:
When Iron levels get this high, it can cause red stains on clothing, colored water, or turbidity?
Answer:
0.3 mg/L
Question:
,Excess Manganese can cause?
Answer:
black stains
Question:
Another method of iron control is the use of?
Answer:
sequestering agents
Question:
What is a sequestering agent?
Answer:
polyphosphates
Question:
Well water is sometimes?
Answer:
corrosive
Question:
Low ph, dissolved gases, high temperatures, and high mineral levels can cause well water to be?
Answer:
corrosive
Question:
What is the process of removing calcium and magnesium by adding lime or by exchanging ions?
, Answer:
softening
Question:
An ion exchange replaces calcium ions with?
Answer:
sodium ions
Question:
A process available for removing arsenic, fluoride, lead, mercury, nitrate, and silver from raw water
is?
Answer:
coagulation followed by sedimentation and filtration
Question:
A process that forces water through a membrane is?
Answer:
reverse osmosis
Question:
In reverse osmosis a sheet of synthetic material (membrane) under pressure prevents passage of
dissolved materials and larger particles and ejects them in a?
Answer:
waste stream
Question:
