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TCEQ Class D Water Operator License: Questions and Answers, Exams of Public Health

A series of true/false questions and multiple-choice questions related to the tceq class d water operator license. It covers topics such as water treatment, safety standards, regulations, and customer relations. Useful for individuals preparing for the tceq class d water operator license exam.

Typology: Exams

2024/2025

Available from 12/20/2024

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TCEQ: CLASS D WATER OPERATOR LICENSE QUESTIONS

WITH ACCURATE ANSWERS

T/F: Operators have a responsibility to provide drinking water that meets Federal and State Standards Accurate Answer - True T/F: Water must be disinfected, delivered at inadequate pressure and be ample in quantity Accurate Answer - False (True if adequate instead of inadequate) T/F: Utility employees should guard the water supply and facilities from contamination, public tours, and even terrorism Accurate Answer - False T/F: The state requires bacteriological sample results to be kept 2 years. Accurate Answer - False (True if 5 years) T/F: The state requires chemical analysis to be kept at least 10 years. Accurate Answer - True T/F: The EPA requires a water system to keep a copy of each consumer confidence report at least 5 years. Accurate Answer - True T/F: A public water system provides the public with piped water for human consumption, serves at least 15 service connections and regularly serves at least 25 individuals daily at least 60 days out of the year Accurate Answer - True The water utility field touches everyone because... A)water used for recreation B)water used for agriculture C)water used for industry D)water is essential to life and health Accurate Answer - D)water essential to life and health Thew water utility employee should remember customers are entitled to... A)courteous treatment B)abuse public servants

C)always be right D)answers to questions about water E)A&D Accurate Answer - E Public systems utilizing ground water serving less than ___ connections on purchase treated water only are not required to compile ___ reports. A)50, yearly B) 150, yearly C) 50, monthly D) 100, monthly Accurate Answer - D Job training for water utility operators is available through the... A)American Water Works Association B)TX Water Utilities Association C)TX Engineering Extension Service D)all listed Accurate Answer - D In TX, water operator license is administered by the... A)EPA B)TNRCC -- TCEQ C)AWWA D)TWUA Accurate Answer - B 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 Accurate Answer - C Public water systems include cities, municipal utility districts, rural water supply corporations, mobile home parts, and ___. A)private wells B)campgrounds C)public pools D)public lakes Accurate Answer - B Examples of community water systems include... A)municipalities

B)municipal utility districts C)rural water supply corporations D)mobile home packs E)all the above Accurate Answer - E A federal agency impacting the water utility industry is the... A)TNRCC B)EPA C)AWWA D)TWUA Accurate Answer - B The most important federal law impacting the water utility industry is the ... A)water resources development act b)federal water pollution control act c)hazard communication act d)safe drinking water act Accurate Answer - D The 4 national safety and quality standards for drinking water covered in the Safe Drinking Water Act are physical, chemical, ___, and radiological A)mineral B)thermal C)bacteriological D)mathematical Accurate Answer - C The state agency that regulates drinking water in TX and administers federal Safe Drinking Water Act is the ... A)TNRCC -- TCEQ B)DPS C)PUC D)TDH Accurate Answer - A Required notification by the water system to the TNRCC includes change or alteration of the system, a new facility to be built and water supply ___. A) rate increases B) health hazards C) bond elections D) bid proposals Accurate Answer - B

Some regional and local agencies impacting the water utility industry are municipal utility districts, rural water supply corporations, drainage districts, ________, groundwater conservation districts, and subsidence districts. A)school districts B)postal distrcits C)real estate agencies D)river authorities Accurate Answer - D T/F: Public relations (PR) is the relationship between you, the water utility employee, and the mayor. Accurate Answer - F T/F: The keys to good customer relations are 1) everything the utility does is PR, 2) customers are entitled to courteous treatment, 3) every employee is a PR person Accurate Answer - True T/F: Meter readers are the persons with whom customers have the least contact. Accurate Answer - False T/F: Meter readers can be ambassadors of goodwill. Accurate Answer - True T/F: Maintenance crews can warn customers of service interruptions and provide signs and barriers to protect the public. Accurate Answer - True T/F: The plant operator is responsible for making the water safe to drink and use. Accurate Answer - True T/F: Water bills should be accurate, itemized, neat and the customer's option to pay. Accurate Answer - False T/F: It is not important that the utility have a sense of pride and professionalism. Accurate Answer - False T/F: Employees should be kept informed of utility plans and policies. Accurate Answer - True T/F: Complaints should be treating as "griping" and investigated as a last priority. Accurate Answer - False

In small water systems, the operator is often... A)a meter reader, repair crew, and pump operator B)highest paid employee C)college graduate D)all listed Accurate Answer - A "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 Accurate Answer - E Delinquent payment notices should be... A) tactful + tasteful B)mailed in envelope C)business-like D)all listed Accurate Answer - D The EPA requires community water systems to provide customers. A)weekly B)monthly C)yearly D)none listed Accurate Answer - C If these reporters are attractive and easy to ___, they can build goodwill and trust with the customer A)misinterpret B)misconstrue C)misunderstand D)understand Accurate Answer - D Good treatment of employees include fair wages, benefits, and ___ working conditions. A)tense B)safe C)hazardous D)insecure Accurate Answer - B

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 Accurate Answer - E Water plant facilities should be kept neat and clean to... A)indicate your professional attitude B)keep public support C)keep confidence in the water quality D)all listed Accurate Answer - D Listen to special requests and seek solutions to oblige the customer within... A)utility policy B)5 working days C)tradition D)secrecy Accurate Answer - A Treat customers as though there was another water utility across the street competing for your... A)job b)employees c)customers d)revenue Accurate Answer - NO ANSWER GIVEN T/F: The chemical symbol for water is HO2. Accurate Answer - False (True if H2O) T/F: Water occurs in 3 forms: solid ice, liquid water, water vapor. Accurate Answer - True T/F: The hydrologic cycle is the natural exchange of water between the earth and atmosphere. Accurate Answer - True T/F: Average water use depends on temperature, rainfall, cost, supply, economic level. Accurate Answer - True

T/F: Groundwater is located above the earth's surface and tapped by wells. Accurate Answer - False T/F: Surface water comes from rivers, lakes, and reservoirs. Accurate Answer - True T/F: Future water supplies will become more plentiful according to the TNRCC/TCEQ. Accurate Answer - False T/F: Surface water or ground water prior to treatment is called freshwater. Accurate Answer - False T/F: Potable water means water is free of disease-causing organisms, has high chlorine residual, and is safe for human consumption. Accurate Answer

  • True T/F: The state must be notified about changes to public water systems involving water source, water quality, and health hazards. Accurate Answer - True T/F: Before starting construction, the utility must submit engineering plans to the AWWA. Accurate Answer - False T/F: Operators should keep records of water usage, system pressure, sample results, chlorine use, repairs, and maintenance Accurate Answer - True T/F: Surface water systems must mail reports to the TNRCC (TCEQ) in Austin by the 5th of the following month. Accurate Answer - False (True if it was the 15th instead of 5th) T/F: Groundwater systems serving 100 connections or more must compile monthly reports, but are not required to mail them. Accurate Answer - True T/F: Water is always found pure in nature. Accurate Answer - False (True if never instead of always)

T/F: Physical characteristics of water are temperature, turbidity, color, taste, odor, and pH. Accurate Answer - False T/F: Turbidity is the amount of suspended matter such as clay, silt, organic matter, and microorganisms in the water. Accurate Answer - True T/F: Color in water can result from mineral or organic matter. Accurate Answer - True T/F: True color is dissolved in water (in solution) and can be removed by filtration. Accurate Answer - False T/F: Red water caused by oxidized iron is in suspension (apparent color) and cannot be removed by filtering. Accurate Answer - False (it actually can be removed by filtration) T/F: Taste and odor comes from algae, bacteria, organic matter, gases, and chemicals. Accurate Answer - True T/F: Surface water supplies should be sampled for chemical analysis every year and ground water supplies should be sampled 3 times a year. Accurate Answer - False T/F: Calcium and magnesium and other minerals cause hardness in water. Accurate Answer - True T/F: The pH scale ranges from 1-14. Accurate Answer - False (True if it said 0-14) T/F: pH of 7 is neutral. Accurate Answer - True T/F: Suspended solids can be removed by filtering and dissolved solids cannot. Accurate Answer - True T/F: Common gases found in water include hydrogen sulfide, carbon dioxide, methane, and sodium chloride. Accurate Answer - False 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 Accurate Answer - C The hydrologic cycle is ... A)nature's way of recycling water B)equipment used to measure distances C)the way water filters through the eearth D)the process by which water runs into rivers and lakes Accurate Answer - A The quality standard for all public water supplies is based on the use of water for... A)fire fighting B)drinking C)bathing D)swimming Accurate Answer - B One of the most important purposes of a public water supply is... A)swimming B)landscape watering C)car washing D)firefighting Accurate Answer - D Organic matter includes... A)sand B)plants, animals, and humans C)minerals D)all listed Accurate Answer - B The most important treatment process is ___, which destroys disease-causing organisms. A)filtration B)disinfection C)softening D)fluoridation Accurate Answer - B Public water systems are required to compile a monthly report showing... A)rate increases

B)accidents C)dates of dead end flushing D)disciplinary action Accurate Answer - C Most ground water is relatively free of suspended matter, but ___ can be a major problem in surface water. A)turbidity B)gases C)sand D)hot water Accurate Answer - A Color in a public water supply should be... A)at least 15 units B)under 3 units C)less than 15 units D)red Accurate Answer - C Chemical characteristics include hardness, pH, solids, and... A)gases B)taste C)temperature D)color Accurate Answer - A Water is considered hard when it exceeds ___ mg/l of calcium carbonate. A)0. B) C) D)1000 Accurate Answer - C 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 Accurate Answer - D Hydrogen sulfide is heavier than air, colorless, flammable, toxic, and has a ___ odor. A)sweet B)rotten egg

C)rotten fish D)fragrant Accurate Answer - B Excessive nitrates in drinking water can cause ___ syndrome in infants. A)bad baby B)blue body C)bloody baby D)blue baby Accurate Answer - D Excessive amounts of fluoride may cause ___ or staining of teeth. A)mottling B)molding C)cracking D)yellowing Accurate Answer - A Trihalomethanes and haloacetic acids are byproducts of chlorination and may increase ___ risk. A)mottled teeth B)red water C)typhoid D)cancer Accurate Answer - D The action level for copper is 1.3 mg/l and for lead it is ___ mg/l. A) B)1. C)0. D)0.15 Accurate Answer - C T/F: Aquifers are underground waterbearing formations yielding useful quantities of water. Accurate Answer - True T/F: The quantity of water a formation yields depends on the thickness and permeability of the formation. Accurate Answer - T T/F: Problems caused by overpumping are falling water levels and subsidence Accurate Answer - True T/F: Well casing and cementing protects the well from collapse and surface contamination. Accurate Answer - True

T/F: The purpose of the well screen is to keep out birds and insects. Accurate Answer - False T/F: The most important feature of the well screen is the length. Accurate Answer - False (True if it was mesh) T/F: The mesh size of the screen is determined by size of the aquifer material, the size of the gravel in the gravel pack, and the type of well development. Accurate Answer - True T/F: The gravel pack is fine gravel placed around the screen to reduce pumping bacteria. Accurate Answer - False (True if it was sand instead of bacteria) T/F: The well vent is a vacuum breaker allowing the casing to breathe as water levels change when the pump cycles. Accurate Answer - True T/F: All public wells must be provided with a steel sealing block, a meter, a screened vent, and a sampling faucet. Accurate Answer - False (True if concrete instead steel) T/F: No source of contamination is allowed within 500 ft of a public well. Accurate Answer - False (True if 50 ft instead of 500) T/F: One way to reduce sand pumping is to increase the pump rate and cycle more. Accurate Answer - False T/F: Water from a new well must not be used until bacteriological samples on 3 successive days show coliform found. Accurate Answer - False (True if coliform not found) T/F: The water level without the pump running is called the static level, the water level with the pump running is called the pumping level, and the difference between the two is called the dropdown. Accurate Answer - False (True if it was a drawdown instead of dropdown) T/F: Ground water usually contains more dissolved minerals and gases than surface water, but fewer ___.

A)microorganics B)microorganisms C)corrosives D)dissolved solids Accurate Answer - A Water table wells are usually ___ wells. A)deep wells B)artesian C)shallow D)all listed Accurate Answer - C In a water table well, the cone of depression is a ___ area around the well. A)dewatered B)depressed C)deflated D)developed Accurate Answer - A A sanitary control easement must cover land w/in ___ ft of public well. A) B) C) D)15 Accurate Answer - C Livestock and septic tanks must be no closer than ___ ft to public well. A) B) C) D)5 Accurate Answer - C Underground fuel tanks and septic drainage fields must be at least ___ ft from a public well. A) B) C) D)15 Accurate Answer - C Feedlots, sewage treatment plants, and landfills must be at least ___ feet from a public well. A)

B)

C)

D)50,000 Accurate Answer - B A well may be developed by surging, overpumping, jetting, and... A)backwashing B)backflushing C)backflooding D)backfilling Accurate Answer - A To disinfect a new well, a chlorine dosage of at least ___ mg/L of chlorine is required. A) B) C) D)50 Accurate Answer - D A sample for physical and chemical analysis must be taken after ___ hours of pumping. A) B) C) D)63 Accurate Answer - C 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 D)sampling faucet Accurate Answer - B Common deep well pumps include the ___ and the vertical turbine. A)submarine B)subsidence C)submission D)submersible Accurate Answer - D Gases such as methane, carbon dioxide, and hydrogen sulfide are reduced by ___.

A)backwashing B)sequestering C)aeration D)softening Accurate Answer - C T/F: Water from rivers, lakes, reservoirs is called ground water. Accurate Answer - False T/F: 50% of public water systems use surface water. Accurate Answer

  • False (True if 25%) T/F: Boat ramps, marinas, docks should not be located within 1000 ft of a water intake. Accurate Answer - True T/F: Surface water contains bacteria, algae, and turbidity but low in minerals, gases, and dissolved solids. Accurate Answer - True T/F: The objectives of water treatment are protection of public health, supplying an aesthetically pleasing product, and protection of consumer property. Accurate Answer - True T/F: TNRCC (TCEQ) requires surface water to have pretreatment, pre- disinfection, taste and odor control, coagulation, sedimentation, filtration, covered storage, and terminal disinfection. Accurate Answer - True T/F: Methods for controlling taste and odor problems are lake destratification, algae control, aeration, chemical oxidation, and activated carbon. Accurate Answer - True T/F: One of the causes of taste and odor problems is algae and bacteria. Accurate Answer - True T/F: Coagulants are sodium aluminate, aluminum sulfate, ferrous sulfate, and sodium chloride. Accurate Answer - False (True if sodium chloride was not included in the list) T/F: Coagulants cause small particles in water to clot together forming floc, and this process, flocculation, forms larger particles that settle more readily. Accurate Answer - True

T/F: Bucket tests help operator determine chemical dosage effect coagulation. Accurate Answer - False (True if it was jar tests) T/F: Turbidity, pH, temperature, alkalinity, and chemical dosage effect coagulation. Accurate Answer - True T/F: To remove suspended solids and chlorine resistant microorganisms, surface water must be disinfected. Accurate Answer - False (True if it was filtered instead of disinfected) T/F: Filtering is the final step in removing suspended matter and chlorine resistant microorganisms. Accurate Answer - True T/F: A common filter is the slowsand filter, having several layers of different sized media. Accurate Answer - False (True if it was rapidsand) T/F: A filter must be whitewashed when a head loss of 6 to 10 ft occurs. Accurate Answer - False (True if it was backwashed instead of whitewashed) Most surface water is low in minerals, gases, and ___. A)algae B)turbidity C)dissolved solids D)bacteria Accurate Answer - C Quality water has low amounts of color, turbidity, solids and ___. A)oxygen B)taste and odor C)hydrogen D)all listed Accurate Answer - B Pretreatment includes lake destratification, control of algae, debris removal, presedimentation, aeration, ___ and activated carbon adsorption. A)chemical oxidation B)filtration C)terminal disinfection D)backwashing Accurate Answer - A

Copper sulfate in dosages of ___ and approved algaecides control algae blooms. A)10 to 50 mg/l B)1 to 5 mg/l C)0.1 to 0.5 mg/l D)0.01 to 0.05 mg/l Accurate Answer - C The most effective treatment for taste and odor is adsorption with ___. A)activated carbon B)chlorine C)ferric chloride D)copper sulfate Accurate Answer - A The process of using chemicals to clot particles together is called... A)sedimentation B)filtration C)coagulation and flocculation D)all listed Accurate Answer - C Lime is applied to water to ___... A)coat water mains B)adjust pH or alkalinity C)prevent tooth decay D)prevent algae Accurate Answer - B Detention time in sedimentation basins must be at least ___ hours to allow floc at settle. A) 6 B) 5 C) 4 D)3 Accurate Answer - A Factors effecting sedimentation basins are the weight of floc, ___, detention time, and short circuiting. A)water temp B)water velocity C)taste and odor D)a&b Accurate Answer - A Backwashing should expand the filter bed by ___ percent.

A)5 to 10 B)15 to 20 C)25 to 30 D)30 to 50 Accurate Answer - D A common filter problem is ___, prevented by proper backwashing. A)ice B)mud balls C)detention time D)coagulation Accurate Answer - B Chemicals used disinfection are chloramine, chlorine, chlorine dioxide, and ___. A)ferrous sulfate B)copper sulfate C)activated carbon D)ozone Accurate Answer - D T/F: Disinfection destroys disease-causing microorganisms called pathogens. Accurate Answer - True T/F: Disinfection destroys pathogens without sterilizing the water. Accurate Answer - True T/F: Waterborne pathogens live and grow in the intestines of infected people. Accurate Answer - True T/F: Infected fecal matter entering a water supply transmits pathogens to healthy people. Accurate Answer - True T/F: Some disease transmitted by unsafe water include typhoid, dysentery, cholera, measles, polio, cryptosporidiosis. Accurate Answer - False (True if list did not include measles) T/F: Each water sample is tested for all waterborne diseases. Accurate Answer - False T/F: Water samples are tested for microorganisms that indicate fecal contamination. Accurate Answer - True

T/F: The total coliform group of viruses are the indicators of fecal contamination. Accurate Answer - False T/F: Fecal coliform live in the intestines of humans and warm-blooded animals. Accurate Answer - True T/F: The presence of fecal coliform in a water sample indicates intestinal waste is in the sample, but there is no risk of disease Accurate Answer

  • False (no risk is questionable) T/F: The number of water taps served by the system determines the minimum number of bacteriological samples. Accurate Answer - False (should be related to population) T/F: the purpose of the sample-siting plan is to assure bacteriological samples are taken from houses. Accurate Answer - False (should be representative) T/F: Sodium thiosulfate is put into bacteriological sample bottles to sterilize Accurate Answer - False (True if it said sodium thiosulfate neutralize Cl2) T/F: Before taking a bacteriological sample, flush the service line. Accurate Answer - True T/F: The sample bottle should be completely filled with sample water. Accurate Answer - False (True if it said fill to 100 mL) T/F: The monthly bacteriological sample should be marked "construction" Accurate Answer - False T/F: Get samples to the lab within 36 hours or they are rejected. Accurate Answer - False (True if it said 30 hrs) T/F: It is possible to have positive samples removed from your record. Accurate Answer - True T/F: It is an acute public health risk if a positive fecal coliform repeat sample or a positive total coliform repeat sample follows a positive fecal coliform routine sample. Accurate Answer - True

T/F: Acute violations require public notification within 72 hours by radio and television using the words "Minor Health Concern". Accurate Answer - False T/F: In the event of low distribution pressure (below 20 psi), water outages, repeated unacceptable microbiological samples or failure to maintain adequate chlorine residuals, special precautions must be instituted by the water system. Accurate Answer - True In Texas, all public water systems are required to have ___ facilities. A)ozonation B)chlorination C)softening D)trihalomethane Accurate Answer - B Chlorination is the most important process in the production of ___ water. A)public B)private C)potable D)political Accurate Answer - C 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 Accurate Answer - D Bleach used in public water systems must be ___ approved. A) AWWA B) TEEX C) OSHA D) NSF Accurate Answer - D Sodium hypochlorite is a liquid ___. A)bleach B)sodium C)chlorine D)hydroxide Accurate Answer - A

Calcium hypochlorite is made by reacting chlorine with ___. A)sodium B)lime C)bleach D)salt Accurate Answer - B Calcium hypochlorite will cause explosions or fires if it contacts ___ material. A)organic B)inorganic C)suspended D)dissolved Accurate Answer - A At room temperature chlorine gas is greenish-yellow, has pungent odor, is ___ times heavier than air. A)2 B)1.5 C)2.5 D)3 Accurate Answer - C The maximum sustained gas withdrawal rate from 150 lb cylinders (vacuum transmission) is ___ lb/day per degree F A)4 B)3 C)2 D)1 Accurate Answer - D Disinfection capacity for drinking water must be ___ percent greater than the highest expected dosage. A)30 B)40 C)50 D)60 Accurate Answer - C Small water systems often use ___ to disinfect their water supply. A)hydrochlorinators B)hypochlorinators C)hyperchlorinators D)hydrachlorinators Accurate Answer - B

Hypochlorinators consist on of a mixing tank, water, ___, hypochlorite or ___ hypochlorite and a chemical pump. A)sodium/calcium B)salt/lime C)hydrogen/oxygen D)green/yellow Accurate Answer - A Gas chlorinators use a rotameter to meter chlorine in ___ or grams/hr. A)lbs/minute B)lbs/hour C)lbs/day D)gal/minute Accurate Answer - C Dosage is the amount of chemical applied, demand is the amount of chemical used up, ___ is the amount of chemical remaining after reacting with demand. A)breakpoint B)chloramine C)residual D)combined Accurate Answer - C Minimum chlorine residuals of ________ (free) and ________ (combined) are required in the far reaches of the distribution system. A)0.5/0.2 B)5/2 C)2/5 D)0.2/0.5 Accurate Answer - D The DPD and chlorine reaction turns the water a ___ color. A)green to blue B)pink to read C)yellow to red D)red to brown Accurate Answer - B T/F: Storage facilities equalize demand on water supply. Accurate Answer - True T/F: Storage allows uniform pump rates, supplies water for fire fighting and provides time for disinfection. Accurate Answer - True

T/F: Ground storage at a surface water treatment plant is a called a clean well. Accurate Answer - False (True if it was clear instead of clean) T/F: The TNRCC requires storage tanks to have covered vents, an airtight cover, over runs and and escape hatches. Accurate Answer - False (True if overrun was not mentioned) T/F: If ground storage is the only storage, capacity must be 20 gallons per connection. Otherwise total storage capacity (elevated storage included) must be 300 gallons per connection. Accurate Answer - False T/F: If a 30 inch diameter access opening is not provided in a storage tank the primary roof access must not be less than 30 inches. Accurate Answer - True T/F: Storage must be painted, disinfected, and maintained according to OSHA standards. Accurate Answer - False (True if it was AWWA instead of OSHA) T/F: No paint, coating, or waxing containing lead is allowed. Accurate Answer - True T/F: Coating for contact with potable water must be approved by the EPA, National Sanitation foundation, or the Food and Drug Administration. Accurate Answer - True T/F: Elevated storage is tank, usually steel, supported above ground on a tower. Accurate Answer - True T/F: Pressure from an elevated tank is maintained by the height of the water column. Accurate Answer - True T/F: Each foot of water column produces 0.334 psi. Accurate Answer - False (True if it said 0.433 psi instead of 0.334) T/F: Water stored at least 80.85 ft above the highest service connection provides the state minimum normal operating of pressure 35 psi. Accurate Answer - True

T/F: A standpipe is a tank resting on the ground that is greater in height than diameter. Accurate Answer - True T/F: Pressure inside a hydropneumatic tank is provided by air mechanically compressed against the water surface. Accurate Answer - True T/F: The exterior and interior of ground, elevated, standpipe and pressure tanks must be inspected monthly. Accurate Answer - False (True if it was yearly instead of monthly) T/F: Storage tank inspect results must be kept at least 5 years. Accurate Answer - True T/F: Cathodic protection is an electrochemical method of preventing corrosion of the exterior of metal tanks. Accurate Answer - False (True if it said interior instead of exterior) T/F: Owership signs must include the utility name and emergency phone number at each production, treatment, or storage site. Accurate Answer - True T/F: Chain link fence material must leave a gap at the ground to trim grass. Accurate Answer - False T/F: The State requires stored water to a have disinfectant demand. Accurate Answer - False (True if it was residual instead of demand) T/F: After construction or maintenance of a storage tank a bacteriological sample must be taken after filling the tank. Accurate Answer - True T/F: If the bacteriological sample is negative, more samples must be taken until 2 consecutive samples are positive. Accurate Answer - False T/F: Critical safeguards of a distribution system include a chlorine residual, adequate pressure, bacteriological sampling and cross connection control Accurate Answer - True

T/F: The TNRCC (TCEQ) requires that distribution pressure never fall below 20 psi, even during emergencies, and normal distribution pressure must be at least 35 psi. Accurate Answer - True T/F: Material used in water line construction must meet TWUA specifications and should not affect the taste, odor, or quality of the water. Accurate Answer - False (True if it was AWWA instead of TWUA) T/F: Plastic pipe must be NSF approved and have an ASTM pressure rating of at least 50 psi or a standard dimension ratio of 62 Accurate Answer - False (True it if it was 26 instead of 62) T/F: Select pipe on the basis of strength, length, carrying capacity, durability, ease of installation, availability, soil conditions, and cost Accurate Answer - False T/F: Pipe and fittings containing more than 8.0 percent lead, or solders and flux containing more than 0.2 percent lead is prohibited in a public water supply. Accurate Answer - True T/F: Isolating valves turn off sections of a system and gate valves are most common. Accurate Answer - True T/F: Flushing solves problems of taste, odor, red water, or bad samples. Accurate Answer - True T/F: The positive displacement meter is the most common design for residential use. Accurate Answer - True T/F: Mains must be no closer than 10 feet, in all directions, from sewers or manholes. Accurate Answer - False (True if it was 9 ft instead of 10) Trenches for laying 6 inch and larger pipe must be at least 18 inches wide and ___ inches wider than the pipe diameter. A) 12 B) 10 C) 8 D) 6 Accurate Answer - A