TCEQ Class D water operator license Latest Update 2024-2025 400+ Questions and Verified Correct Answers Guaranteed A+ ___ is a buildup of oxidized iron, calcium carbonate or other chemicals in mains.A)tuberculosis B)tuberculation C)turbidity
D)slime - CORRECT ANSWER: B
"Stuffers" sent to customers in billing statements may contain...A)departments to call for service B)explanations of utility policy C)history of the utility D)tips on water conservation
E)all of the above - CORRECT ANSWER: E
A common filter problem is ___, prevented by proper backwashing.A)ice B)mud balls C)detention time
D)coagulation - CORRECT ANSWER: B
A cross connection is a physical connection between a public water supply and 1)another supply of unknown or questionable quality 2)any source that may contain contamination 3) any water ___.A)safe to drink B)treated to potable quality C)treated to a greater degree
D)treated to a lesser degree - CORRECT ANSWER: D
A federal agency impacting the water utility industry is the...
A)TNRCC
B)EPA
C)AWWA
D)TWUA - CORRECT ANSWER: B
A gallon of water weighs 8/34 pounds and 1 mg/l equal 1 ___.A)million grams B)thousand grams C)part per thousand
D)part per million - CORRECT ANSWER: D
A maximum allowable slope of 45 degrees and a run to rise of 1:1 is for soil type...A)stable rock 1 / 4
B)class A C)class B
D)class C - CORRECT ANSWER: C
A sample for physical and chemical analysis must be taken after ___ hours of pumping.A)3 B)6 C)36
D)63 - CORRECT ANSWER: C
A sanitary control easement must cover land w/in ___ ft of public well.
A)15000
B)1500
C)150
D)15 - CORRECT ANSWER: C
A well may be developed by surging, overpumping, jetting, and...A)backwashing B)backflushing C)backflooding
D)backfilling - CORRECT ANSWER: A
After action is taken on a complaint, follow up with a phone call or ___ to make sure everything is satisfactory.A)post card B)e-mail C)letter D)A&B
E)A,B,&C - CORRECT ANSWER: E
All pubic water systems are required to employ certified operators even if the system only ___ treated water bought from another source.A)Chlorites B)Sells C)Redistributes
D)Stores - CORRECT ANSWER: C
As the force a pump works against increases, the capacity and efficiency...A)increase B)decrease C)equalize
D)stabilize - CORRECT ANSWER: B
At room temperature chlorine gas is greenish-yellow, has pungent odor, is ___ times heavier than air.
A)2 2 / 4
B)1.5 C)2.5
D)3 - CORRECT ANSWER: C
Backwashing should expand the filter bed by ___ percent.A)5 to 10 B)15 to 20 C)25 to 30
D)30 to 50 - CORRECT ANSWER: D
Benching is a type of sloping done by cutting stair steps in the trench wall while maintaining the maximum allowable ___.A)spoil B)slip C)slide
D)slope - CORRECT ANSWER: D
Besides disinfection, chlorine is used for taste and odor control and ___.A)oxidation of iron and manganese B)oxidation of hydrogen sulfide C)disinfection of repairs
D)all listed - CORRECT ANSWER: D
Bleach used in public water systems must be ___ approved.
A) AWWA
B) TEEX
C) OSHA
D) NSF - CORRECT ANSWER: D
Calcium hypochlorite is made by reacting chlorine with ___.A)sodium B)lime C)bleach
D)salt - CORRECT ANSWER: B
Calcium hypochlorite will cause explosions or fires if it contacts ___ material.A)organic B)inorganic C)suspended
D)dissolved - CORRECT ANSWER: A
Changes in well water levels or the volume of water produced can alert the operator to a drop in the water table, screen stoppage or damage to the ___.A)sealing block B)pump C)vent 3 / 4
D)sampling faucet - CORRECT ANSWER: B
Chemical characteristics include hardness, pH, solids, and...A)gases B)taste C)temperature
D)color - CORRECT ANSWER: A
Chemically, water is made of...A)one atom of water B)one atom of hydrogen and one atom of oxygen C)two atoms of hydrogen and one atom of oxygen
D)one atom of hydrogen and two atoms of oxygen - CORRECT ANSWER: C
Chemicals used disinfection are chloramine, chlorine, chlorine dioxide, and ___.A)ferrous sulfate B)copper sulfate C)activated carbon
D)ozone - CORRECT ANSWER: D
Chlorination is the most important process in the production of ___ water.A)public B)private C)potable
D)political - CORRECT ANSWER: C
Closing a hydrant valve too fast can cause water ___.A)slammer B)boomer C)mallet
D)hammer - CORRECT ANSWER: D
Color in a public water supply should be...A)at least 15 units B)under 3 units C)less than 15 units
D)red - CORRECT ANSWER: C
Common deep well pumps include the ___ and the vertical turbine.A)submarine B)subsidence C)submission
D)submersible - CORRECT ANSWER: D
Common pump problems include ___ and water hammer.A)proper alignment of pump and motor
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