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TCEQ class c water license exam with Questions & Answers.
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TCEQ class c water license exam with Questions & Answers.
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TCEQ class c water license exam with Questions &Answers
1. State Agency responsince for enforcing the safe drinking water act in
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Texas: Texas 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
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water, pressure, and disinfection
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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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tion that: Water supply is contaminated, harmful bacteria may be present,
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possible pathogenic organisms in the water, water is unsuitable for
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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
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hypochlorite
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8. A physical connection between a potable water supply and house well
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would be: A cross connection
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9.The amount of chlorine in mg/L that is used up by reacting with iron organics
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of bacteria is called: Demand
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10.Which of the following is a physical characteristic of chlorine gas: Green-
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ish-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-chlorinator
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system: Solution feed pump
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12.According to state requirements, all public water Supply wells should be yi yi yi yi yi yi yi yi yi yi
provided with a raised concrete sealing block, screened vents, and-: A flow
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measuring device
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13.Drawdown of a water well is determined by: Difference in static and yi yi yi yi yi yi yi yi yi yi yi
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
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,sample for bacteriological testing?: Use of an approved, sterile sample
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container
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18.Sand filtration will remove which of the following from surface water: Tur-
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bidity
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19.Activated carbon is used in a surface water plant primarily for: Taste and
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odor control
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20.Which or the following chemicals are commonly used as coagulants in
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surface water 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
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hinged flap device, annual inspection and maintenance as needed
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, 22.An elevated storage tank should be protected against corrosion by: Paint-
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ing, cathodic protection, water stabilization, and only using galvanized
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and lead based primed components
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23.A public water supply system should maintain residual pressure of 20 psi
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and a minimum 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 yi yi yi yi yi yi yi yi yi yi yi yi yi
properly disinfected by providing a chlorine dosage of
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detention time: 50 mg/L
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25.Water bearing formations beneath the earths surface that are used as a yi yi yi yi yi yi yi yi yi yi yi
source of 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
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sized openings 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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ed 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
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gauge indicated between 6 and 10 feet
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30.Which of the following is an acceptable disinfection residual at the far yi yi yi yi yi yi yi yi yi yi yi
reaches of the distribution System: 0.2 mg/L free chlorine residual, 0.8
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mg/L chloramine residual when using chloramine treatment, 0.5 mg/L
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chloramine for surface water supply, 0.5 mg/L free chlorine residual for
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ground water Supply
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31.What is the approximate total volume of a circular tank in gall yi yi yi yi yi yi yi yi yi yi yi
feet in diameter, and 15 feet deep: 79,300 gallons
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32. You are using a chlorinator to provine a dosage of 4.0 mg/L. I f the daily
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Water usage is 750,000 gallons, the gas chlorinator feed rate sh ould be set at
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yi pounds per day.: 25 yi yi yi
33.One gallon of water weighs: 8.34 lbs. yi yi yi yi yi yi
34.One foot of water inside a storage vessel will raise a pressure gauge at the
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bottom of the vessel by: 0.433 lbs. (1 ft. Water creates 0.433 psi of
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pressure)
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35.A raw water intake structure may not be constructed with
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of a boat ramp, dock, or marina: 1,000 feet
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36.Common types of pumps for use in water wells are: Vertical turbine yi yi yi yi yi yi yi yi yi yi yi
and submersible
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37. is the natural exchange of water between the earth and air: The
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hydraulic cycle
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