TCEQ class c water license exam
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 indication 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-Yellow 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
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
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, TCEQ class c water license exam
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 affected 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.
34. One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the vessel by: 0.433 lbs. (1 ft. Water
creates 0.433 psi of pressure) 35. A raw water intake structure may not be constructed with ___________ feet of a boat
ramp, dock, or marina: 1,000 feet
36. Common types of pumps for use in water wells are: Vertical turbine and submersible
37. _________ is the natural exchange of water between the earth and air: The hydraulic cycle
38. If and when a health hazard contamination event occurs in a public water System, the operator must contact the state
regulatory authority within __________ hours by telephone: 24 hours
39. Potable water is that of: Maintained at adequate pressure, pathogen free, and contains a chlorine residual
40. Excessive nitrates in drinking water can care a condition that affects infants under the age of 6 months, this condition
known as: Blue baby 41. In surface water treatment the process of causing the fine particles in water to join together to form
larger heavier particles that settle in a clarifier is called: Coagulation
42. The test commonly used to determine the chemical dosage for the surface water plants is the _______ test: Jar
43. Suspended solids are the solids portion that: Cause mudballs and filter plugging
44. A public Water system is required to take samples of water for bacteriological analysis. The organism that is used as an
indicator is: Coliform
45. Chisine dosage is demand plus desired: Residual
46. A storage vessel that is the same diameter from the ground to the top and is more than 20 feet but less than 80 feet tall is
called a: Stand pipe
47. Potable water must be stored at an elevation at least 80.85 feet above the highest known connection to provide the
minimum operating pressure of _____ psi: 35
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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 indication 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-Yellow 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
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
1/8
, TCEQ class c water license exam
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 affected 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.
34. One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the vessel by: 0.433 lbs. (1 ft. Water
creates 0.433 psi of pressure) 35. A raw water intake structure may not be constructed with ___________ feet of a boat
ramp, dock, or marina: 1,000 feet
36. Common types of pumps for use in water wells are: Vertical turbine and submersible
37. _________ is the natural exchange of water between the earth and air: The hydraulic cycle
38. If and when a health hazard contamination event occurs in a public water System, the operator must contact the state
regulatory authority within __________ hours by telephone: 24 hours
39. Potable water is that of: Maintained at adequate pressure, pathogen free, and contains a chlorine residual
40. Excessive nitrates in drinking water can care a condition that affects infants under the age of 6 months, this condition
known as: Blue baby 41. In surface water treatment the process of causing the fine particles in water to join together to form
larger heavier particles that settle in a clarifier is called: Coagulation
42. The test commonly used to determine the chemical dosage for the surface water plants is the _______ test: Jar
43. Suspended solids are the solids portion that: Cause mudballs and filter plugging
44. A public Water system is required to take samples of water for bacteriological analysis. The organism that is used as an
indicator is: Coliform
45. Chisine dosage is demand plus desired: Residual
46. A storage vessel that is the same diameter from the ground to the top and is more than 20 feet but less than 80 feet tall is
called a: Stand pipe
47. Potable water must be stored at an elevation at least 80.85 feet above the highest known connection to provide the
minimum operating pressure of _____ psi: 35
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