CLASS D WATER LICENSE TEXAS FINAL PAPER EXAM QUESTIONS ACCURATE ANSWERS FULL SOLUTION

CLASS D WATER LICENSE TEXAS FINAL PAPER EXAM QUESTIONS ACCURATE
ANSWERS FULL SOLUTION
Class D Water License Texas EXAM Script
2026/2027 Questions and Answers Verified Solutions
Latest Update

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:
The Surface Water Treatment Rule (SWTR) requires community and non-community wells,
springs, and infiltration galleries ( a subsurface tunnel that collects groundwater) to determine
possible direct influence of?

Answer:
surface water



Question:
Changes in groundwater quality can indicate influence of surface water organisms such as giardia
cysts, algae or other?

Answer:
microorganisms



Question:
If well is deeper than 50 feet and more than 200 feet from a nearby surface water body, extensive
evaluation of the influence of surface water on a water supply is?

Answer:
not required



Question:
Surface water evaluations are needed on a water supply when shifts in water quality occur such as
turbidity, temperature, pH, and the presence of?

Answer:
surface water organisms

, Question:
What are underground, water-bearing formations yielding useful quantities of water?

Answer:
Aquifiers



Question:
Problems caused by what are declining water levels and subsidence (sinking of land)?

Answer:
overpumping



Question:
The purpose of the well screen is to keep out birds and?

Answer:
sand



Question:
the most important feature of the well screen is the size of the?

Answer:
opening



Question:
The mesh size of the screen is determined by the size of the aquifer material, the size of the gravel in
the gravel pack, and the type of well?

Answer:
development



Question: