TCEQ class c water license exam
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1. State Agency responsince for enforcing the safe drinking water act in Texas-
: Texas Commission on environmental Quality
2. What minerals can cause water hardness: Calcium and magnesium
3. A public water system must at all times provide: Adequate quantity of water, pressure, and
disinfection
4. A source groundwater would be: aquifer
5. Fecal coliform organisms sometimes found in water supplies are an indica-
tion that: Water supply is contaminated, harmful bacteria may be present, possible pathogenic organisms in the
water, water is unsuitable for drinking
6. A disease that may be spread by inadequately disinfected water: Dysentery
7. A common chemical used in disinfection of small water supply is: Calcium
hypochlorite
8. A physical connection between a potable water supply and house well would
be: A cross connection
9. The amount of chlorine in mg/L that is used up by reacting with iron organics
of bacteria is called: Demand
10. Which of the following is a physical characteristic of chlorine gas: Greenish-Yel-
low Color, heavier than air, pungent penetrating odor, corrosive
11. Which of the following would be considered a part of a hypo-chlorinator
system: Solution feed pump
12. According to state requirements, all public water Supply wells should be
provided with a raised concrete sealing block, screened vents, and-: A flow
measuring device
13. Drawdown of a water well is determined by: Difference in static and pumping levels
14. pH of water indicates: If it's acidic or basic
15. The pH of water is expressed on a pH scale of: 0-14
16. Water that is considered neutral is expressed on the pH scale at: 7.0
17. Which of the following is a required Step in collecting a routine distribution
sample for bacteriological testing?: Use of an approved, sterile sample container
18. Sand filtration will remove which of the following from surface water: Turbidity
19. Activated carbon is used in a surface water plant primarily for: Taste and odor
control
, TCEQ class c water license exam
Study online at https://quizlet.com/_bgkwp2
20. Which or the following chemicals are commonly used as coagulants in
surface water treatment: Alum and ferric chloride
21. Ground storage tanks are required to provided with which of the following-
: Screened vents, an approved locking roof hatch, an overflow pipe with hinged flap device, annual inspection and
maintenance as needed
22. An elevated storage tank should be protected against corrosion by: Painting,
cathodic protection, water stabilization, and only using galvanized and lead based primed components
23. A public water supply system should maintain residual pressure of 20 psi
and a minimum of normal operating pressure of: 35 psi
24. Before a new or repaired water line is placed into service, it must be
properly disinfected by providing a chlorine dosage of _________ and proper
detention time: 50 mg/L
25. Water bearing formations beneath the earths surface that are used as a
source of water for public water supplies are: Aquifers
26. The purpose of an air line on a well is: Determine Water leves in the well
27. The mesh size is an important feature of a well screen because properly
sized openings should: Reduce the amount of Sand pumped
28. When treating surface Water, the process of coagularon will be most affect-
ed by the: pH, alkalinity, temperature, and chemical Dosage
29. A rapid sand filter should be backwashed When: The loss of head gauge indicated
between 6 and 10 feet
30. Which of the following is an acceptable disinfection residual at the far
reaches of the distribution System: 0.2 mg/L free chlorine residual, 0.8 mg/L chloramine residual
when using chloramine treatment, 0.5 mg/L chloramine for surface water supply, 0.5 mg/L free chlorine residual for
ground water Supply
31. What is the approximate total volume of a circular tank in gallons, if it is 30
feet in diameter, and 15 feet deep: 79,300 gallons
32. You are using a chlorinator to provine a dosage of 4.0 mg/L. If the daily
Water usage is 750,000 gallons, the gas chlorinator feed rate should be set at
____________ pounds per day.: 25
33. One gallon of water weighs: 8.34 lbs.
Study online at https://quizlet.com/_bgkwp2
1. State Agency responsince for enforcing the safe drinking water act in Texas-
: Texas Commission on environmental Quality
2. What minerals can cause water hardness: Calcium and magnesium
3. A public water system must at all times provide: Adequate quantity of water, pressure, and
disinfection
4. A source groundwater would be: aquifer
5. Fecal coliform organisms sometimes found in water supplies are an indica-
tion that: Water supply is contaminated, harmful bacteria may be present, possible pathogenic organisms in the
water, water is unsuitable for drinking
6. A disease that may be spread by inadequately disinfected water: Dysentery
7. A common chemical used in disinfection of small water supply is: Calcium
hypochlorite
8. A physical connection between a potable water supply and house well would
be: A cross connection
9. The amount of chlorine in mg/L that is used up by reacting with iron organics
of bacteria is called: Demand
10. Which of the following is a physical characteristic of chlorine gas: Greenish-Yel-
low Color, heavier than air, pungent penetrating odor, corrosive
11. Which of the following would be considered a part of a hypo-chlorinator
system: Solution feed pump
12. According to state requirements, all public water Supply wells should be
provided with a raised concrete sealing block, screened vents, and-: A flow
measuring device
13. Drawdown of a water well is determined by: Difference in static and pumping levels
14. pH of water indicates: If it's acidic or basic
15. The pH of water is expressed on a pH scale of: 0-14
16. Water that is considered neutral is expressed on the pH scale at: 7.0
17. Which of the following is a required Step in collecting a routine distribution
sample for bacteriological testing?: Use of an approved, sterile sample container
18. Sand filtration will remove which of the following from surface water: Turbidity
19. Activated carbon is used in a surface water plant primarily for: Taste and odor
control
, TCEQ class c water license exam
Study online at https://quizlet.com/_bgkwp2
20. Which or the following chemicals are commonly used as coagulants in
surface water treatment: Alum and ferric chloride
21. Ground storage tanks are required to provided with which of the following-
: Screened vents, an approved locking roof hatch, an overflow pipe with hinged flap device, annual inspection and
maintenance as needed
22. An elevated storage tank should be protected against corrosion by: Painting,
cathodic protection, water stabilization, and only using galvanized and lead based primed components
23. A public water supply system should maintain residual pressure of 20 psi
and a minimum of normal operating pressure of: 35 psi
24. Before a new or repaired water line is placed into service, it must be
properly disinfected by providing a chlorine dosage of _________ and proper
detention time: 50 mg/L
25. Water bearing formations beneath the earths surface that are used as a
source of water for public water supplies are: Aquifers
26. The purpose of an air line on a well is: Determine Water leves in the well
27. The mesh size is an important feature of a well screen because properly
sized openings should: Reduce the amount of Sand pumped
28. When treating surface Water, the process of coagularon will be most affect-
ed by the: pH, alkalinity, temperature, and chemical Dosage
29. A rapid sand filter should be backwashed When: The loss of head gauge indicated
between 6 and 10 feet
30. Which of the following is an acceptable disinfection residual at the far
reaches of the distribution System: 0.2 mg/L free chlorine residual, 0.8 mg/L chloramine residual
when using chloramine treatment, 0.5 mg/L chloramine for surface water supply, 0.5 mg/L free chlorine residual for
ground water Supply
31. What is the approximate total volume of a circular tank in gallons, if it is 30
feet in diameter, and 15 feet deep: 79,300 gallons
32. You are using a chlorinator to provine a dosage of 4.0 mg/L. If the daily
Water usage is 750,000 gallons, the gas chlorinator feed rate should be set at
____________ pounds per day.: 25
33. One gallon of water weighs: 8.34 lbs.
