CLASS D WATER LICENSE TEXAS EXAM REVIEW SOLVED QUESTIONS COMPLETE ANSWERS GRADED A PLUS

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: