TCEQ CLASS C WATER LICENSE EXAM | COMPLETE QUESTIONS WITH EXPERT
SOLUTION | 2026 LATEST UPDATED GET A+
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-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
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
SOLUTION | 2026 LATEST UPDATED GET A+
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-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
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
