TCEQ class c water license Final Exam Questions and Answers Guaranteed Pass

TCEQ class c water license Final Exam Questions and Answers Guaranteed Pass


1. State Agency Responsince for enforcing the safe drinking water act in Texas: Tex
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as Commission on environmental Quality
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2. What minerals can cause water hardness: Calcium and magnesium
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3. A public water system must at all times provide: Adequate quantity of water, pressure,
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and disinfectionb


4. A source groundwater would be: aquifer
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5. Fecal coliform organisms sometimes found in water supplies are an indica-
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btion that: Water supply is contaminated, harmful bacteria may be present, possible pathoge
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nic organisms in the water, water is unsuitable for drinking
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6. A disease that may be spread by inadequately disinfected water: Dysentery
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7. A common chemical used in disinfection of small water supply is: Calcium hypochlorit
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e
8. A physical connection between a potable water supply and house well would be:
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A cross connection
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9. The amount of chlorine in mg/L that is used up by reacting with iron organics of bacteria i
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s called: Demand
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10. Which of the following is a physical characteristic of chlorine gas: Green- ish-
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Yellow Color, heavier than air, pungent penetrating odor, corrosive
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11. Which of the following would be considered a part of a hypo-
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chlorinator system: Solution feed pump b b b b


12. According to state requirements, all public water Supply wells should be provided w
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ith a raised concrete sealing block, screened vents, and-: A flow measuring device
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13. Drawdown of a water well is determined by: Difference in static and pumping levels
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14. pH of water indicates: If it's acidic or basic
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15. The pH of water is expressed on a pH scale of: 0-14
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16. Water that is considered neutral is expressed on the pH scale at: 7.0
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17. Which of the following is a required Step in collecting a routine distribution sample for
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bacteriological testing?: Use of an approved, sterile sample container b b b b b b b b


18. Sand filtration will remove which of the following from surface water: Tur- bidity
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1b/b
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,19. Activated carbon is used in a surface water plant primarily for: Taste and odor contro
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l
20. Which or the following chemicals are commonly used as coagulants in surface wa
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ter treatment: Alum and ferric chloride
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21. Ground storage tanks are required to provided with which of the following-
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: Screened vents, an approved locking roof hatch, an overflow pipe with hinged flap device, an
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ual inspection and maintenance as needed
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2b/b
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, 22. An elevated storage tank should be protected against corrosion by: Paint-
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bing, cathodic protection, water stabilization, and only using galvanized and lead based prim
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ed components b


23. A public water supply system should maintain residual pressure of 20 psi and a mini
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mum of normal operating pressure of: 35 psi
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24. Before a new or repaired water line is placed into service, it must be properly disinfe
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cted by providing a chlorine dosage of
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and proper detention time: 50 mg/L b b b b b


25. Water bearing formations beneath the earths surface that are used as a source of
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water for public water supplies are: Aquifers
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26. The purpose of an air line on a well is: Determine Water leves in the well
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27. The mesh size is an important feature of a well screen because properly sized open
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ings should: Reduce the amount of Sand pumped
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28. When treating surface Water, the process of coagularon will be most affect-
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bed by the: pH, alkalinity, temperature, and chemical Dosage
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29. A rapid sand filter should be backwashed When: The loss of head gauge indicated b
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etween 6 and 10 feet b b b b


30. Which of the following is an acceptable disinfection residual at the far reaches o
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f the distribution System: 0.2 mg/L free chlorine residual, 0.8 mg/L chloramine residual
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when using chloramine treatment, 0.5 mg/L chloramine for surface water supply, 0.5 mg
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/L free chlorine residual for ground water Supply
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31. What is the approximate total volume of a circular tank in gall feet in di
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ameter, and 15 feet deep: 79,300 gallons b b b b b b




32. You are using a chlorinator to provine a dosage of 4.0 mg/L. I Water usa f the daily o
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ge is 750,000 gallons, the gas chlorinator feed rate sh
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uld be set at
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pounds per day.: 25 b b b


33. One gallon of water weighs: 8.34 lbs. b b b b b b


34. One foot of water inside a storage vessel will raise a pressure gauge at the bottom of t
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he vessel by: 0.433 lbs. (1 ft. Water creates 0.433 psi of pressure)
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35. A raw water intake structure may not be constructed with
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3b/b
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