TCEQ CLASS C WATER LICENSE EXAM
Questions and Answers
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 hypochlo-rite
,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 sur-face 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:
Questions and Answers
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 hypochlo-rite
,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 sur-face 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:
