TEXAS CLASS D WATER LICENSE EXAM QUESTIONS WITH CORRECT ANSWERS A+ GRADE
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TEXAS CLASS D WATER LICENSE
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TEXAS CLASS D WATER LICENSE
TEXAS CLASS D WATER LICENSE EXAM QUESTIONS
WITH CORRECT ANSWERS A+ GRADE What removes tastes, odors, and certain organics and gases, and oxidizes iron and
manganese? This process includes the incorporation of air into thewater by means of spray
nozzles , steps or cascades, or trays of diffuser...
TEXAS CLASS D WATER LICENSE EXAM QUESTIONS
WITH CORRECT ANSWERS A+ GRADE
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?: contamination
Sequestering does not remove iron from the water, but prevents it fromcombining with
oxygen and?: Ans- reddening
The quantity of water a formation yields depends on the formations thick-ness and?: Ans-
permeability
Cascade aerators, packed air-stripping towers, and air diffusers are used toaerate?: Ans-
water
Aeration can be used to remove what from the water supply?: Ans- iron andmanganese
Hydrogen sulfide has a rotten egg odor and is oxidized by?: Ans- super-chlorination
,When Iron levels get this high, it can cause red stains on clothing, coloredwater, or
turbidity?: Ans 0.3 mg/L
Excess Manganese can cause?:Ans black stains
Another method of iron control is the use of?: Ans sequestering agents
What is a sequestering agent?: Ans polyphosphates
Well water is sometimes?: Ans corrosive
Low ph, dissolved gases, high temperatures, and high mineral levels cancause well water to
be?: Ans corrosive
What is the process of removing calcium and magnesium by adding limeor 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 pres- sure prevents
passage of dissolved materials and larger particles and ejectsthem 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 surfacewater
, Changes in groundwater quality can indicate influence of surface waterorganisms 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 watersupply is?: Ans not required
Surface water evaluations are needed on a water supply when shifts inwater quality occur
such as turbidity, temperature, pH, and the presence of?: Ans surface water organisms
What are underground, water-bearing formations yielding useful quantitiesof water?: Ans
Aquifiers
Problems caused by what are declining water levels and subsidence (sink-ing 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 mater-ial, 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 pump-ing?: Ans sand
The well vent is a vacuum breaker allowing the casing to breathe as waterlevels change
when the pump?: Ans cycles
All public wells must be provided with a steel sealing block, a meter, ascreened vent, and a
sampling?: Ans faucet
No source of contamination is allowed within how many feet of a publicwell?: Ans 50
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