TEXAS CLASS D WATER LICENSE EXAM WITH
QUESTIONS AND WELL VERIFIED ANSWERS [ALREADY
GRADED A+} REAL EXAM !!! REAL EXAM !! 2025
What is a sequestering agent? -----ANS----polyphosphates
Well water is sometimes? -----ANS----corrosive
Low ph, dissolved gases, high temperatures, and high mineral levels can cause
well water to be? -----ANS----corrosive
What is the process of removing calcium and magnesium by adding lime or by
exchanging ions? -----ANS----softening
An ion exchange replaces calcium ions with? -----ANS----sodium ions
A process available for removing arsenic, fluoride, lead, mercury, nitrate, and
silver from raw water is? -----ANS----coagulation followed by sedimentation and
filtration
A process that forces water through a membrane is? -----ANS----reverse
osmosis
,In reverse osmosis a sheet of synthetic material (membrane) under pressure
prevents passage of dissolved materials and larger particles and ejects them in
a? -----ANS----waste stream
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? -----ANS----
surface water
Changes in groundwater quality can indicate influence of surface water
organisms such as giardia cysts, algae or other? -----ANS----microorganisms
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? -----ANS----not required
Surface water evaluations are needed on a water supply when shifts in water
quality occur such as turbidity, temperature, pH, and the presence of? -----ANS--
--surface water organisms
What are underground, water-bearing formations yielding useful quantities of
water? -----ANS----Aquifiers
Problems caused by what are declining water levels and subsidence (sinking of
land)? -----ANS----overpumping
The purpose of the well screen is to keep out birds and? -----ANS----sand
, the most important feature of the well screen is the size of the? -----ANS----
opening
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 ? -----ANS----
development
The gravel pack is fine gravel placed around the screen to reduce pumping? -----
ANS----sand
The well vent is a vacuum breaker allowing the casing to breathe as water levels
change when the pump? -----ANS----cycles
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? -----ANS----
Aeration
TCEQ regulation states that Shore installations , marinas, boats and houses on
the watershed must have sewage? -----ANS----disposal
Water aerated or chlorinated at proper pH levels oxidizes the iron and
manganese, turning them into solid? -----ANS----particles
Well casing and cementing protect the well from collapse and surface ? -----
ANS----contamination
QUESTIONS AND WELL VERIFIED ANSWERS [ALREADY
GRADED A+} REAL EXAM !!! REAL EXAM !! 2025
What is a sequestering agent? -----ANS----polyphosphates
Well water is sometimes? -----ANS----corrosive
Low ph, dissolved gases, high temperatures, and high mineral levels can cause
well water to be? -----ANS----corrosive
What is the process of removing calcium and magnesium by adding lime or by
exchanging ions? -----ANS----softening
An ion exchange replaces calcium ions with? -----ANS----sodium ions
A process available for removing arsenic, fluoride, lead, mercury, nitrate, and
silver from raw water is? -----ANS----coagulation followed by sedimentation and
filtration
A process that forces water through a membrane is? -----ANS----reverse
osmosis
,In reverse osmosis a sheet of synthetic material (membrane) under pressure
prevents passage of dissolved materials and larger particles and ejects them in
a? -----ANS----waste stream
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? -----ANS----
surface water
Changes in groundwater quality can indicate influence of surface water
organisms such as giardia cysts, algae or other? -----ANS----microorganisms
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? -----ANS----not required
Surface water evaluations are needed on a water supply when shifts in water
quality occur such as turbidity, temperature, pH, and the presence of? -----ANS--
--surface water organisms
What are underground, water-bearing formations yielding useful quantities of
water? -----ANS----Aquifiers
Problems caused by what are declining water levels and subsidence (sinking of
land)? -----ANS----overpumping
The purpose of the well screen is to keep out birds and? -----ANS----sand
, the most important feature of the well screen is the size of the? -----ANS----
opening
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 ? -----ANS----
development
The gravel pack is fine gravel placed around the screen to reduce pumping? -----
ANS----sand
The well vent is a vacuum breaker allowing the casing to breathe as water levels
change when the pump? -----ANS----cycles
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? -----ANS----
Aeration
TCEQ regulation states that Shore installations , marinas, boats and houses on
the watershed must have sewage? -----ANS----disposal
Water aerated or chlorinated at proper pH levels oxidizes the iron and
manganese, turning them into solid? -----ANS----particles
Well casing and cementing protect the well from collapse and surface ? -----
ANS----contamination
