Page 1 of 18
May 8, 2026
Class D Water License – Texas EXAM | LATEST UPDATED |
COMPLETE 80 QUESTIONS AND 100% RATED CORRECT ANSWERS |
(ALREADY GRADED A+)
1. Operators have a responsibility to provide drinking water that meets federal and state standards.
A. True
B. False
Correct Answer: A. True
Rationale: Water operators are legally responsible for ensuring drinking water complies with all federal
and state safety standards.
2. Water must be disinfected, delivered at inadequate pressure, and be ample in quantity.
A. True
B. False
Correct Answer: B. False
Rationale: Water must be delivered at adequate pressure, not inadequate pressure.
3. Utility employees should guard the water supply and facilities from contamination, public tours,
and even terrorism.
A. True
B. False
Correct Answer: B. False
Rationale: Utilities should protect against contamination and terrorism, but public tours are not
considered threats when properly supervised.
4. The state requires bacteriological sample results be kept _____ years.
A. 2 years
B. 3 years
C. 5 years
D. 10 years
Correct Answer: C. 5 years
Rationale: Texas regulations require bacteriological records to be retained for 5 years.
5. The state requires chemical analysis be kept at least _____ years.
A. 3 years
, Page 2 of 18
May 8, 2026
B. 5 years
C. 7 years
D. 10 years
Correct Answer: D. 10 years
Rationale: Chemical analysis records must be retained for a minimum of 10 years.
6. EPA requires a water system to keep a copy of each consumer confidence report at least _____
years.
A. 2 years
B. 3 years
C. 5 years
D. 10 years
Correct Answer: C. 5 years
Rationale: Consumer Confidence Reports (CCR) must be retained for 5 years.
7. A public water system provides the public with piped water for human consumption, serves at least
_____ service connections, and regularly serves at least _____ individuals daily at least _____ days out
of the year.
A. / 30
B. / 60
C. / 90
D. / 120
Correct Answer: B. / 60
Rationale: This is the EPA and TCEQ definition of a public water system.
8. The water utility field affects everyone because _____.
A. water is used for recreation
B. water is essential to life and health
C. water is inexpensive
D. water systems create jobs
Correct Answer: B. water is essential to life and health
Rationale: Safe water is critical for public health and survival.
9. The water utility employee should remember customers are entitled to _____.
A. free service and reduced bills
B. courteous treatment and answers to questions about water
C. unlimited water use
D. priority service
, Page 3 of 18
May 8, 2026
Correct Answer: B. courteous treatment and answers to questions about water
Rationale: Professional customer service is a major responsibility of utility employees.
10. In Texas, water operator licensing is administered by the _____.
A. EPA
B. OSHA
C. USDA
D. TCEQ
Correct Answer: D. TCEQ
Rationale: The Texas Commission on Environmental Quality oversees operator licensing.
11. All public water systems are required to employ licensed operators even if the system only _____
treated water bought from another source.
A. stores
B. chlorinates
C. redistributes
D. tests
Correct Answer: C. redistributes
Rationale: Even systems distributing purchased treated water require licensed operators.
12. Public water systems include cities, municipal utility districts, rural water supply corporations,
mobile home parks, and _____.
A. golf courses
B. factories
C. campgrounds
D. warehouses
Correct Answer: C. campgrounds
Rationale: Campgrounds serving sufficient people are classified as public water systems.
13. Examples of community water systems include ________.
A. municipalities
B. municipal utility districts
C. rural water supply corporations
D. mobile home parks
E. all of the above
Correct Answer: E. all of the above
Rationale: All listed examples are recognized community water systems.
May 8, 2026
Class D Water License – Texas EXAM | LATEST UPDATED |
COMPLETE 80 QUESTIONS AND 100% RATED CORRECT ANSWERS |
(ALREADY GRADED A+)
1. Operators have a responsibility to provide drinking water that meets federal and state standards.
A. True
B. False
Correct Answer: A. True
Rationale: Water operators are legally responsible for ensuring drinking water complies with all federal
and state safety standards.
2. Water must be disinfected, delivered at inadequate pressure, and be ample in quantity.
A. True
B. False
Correct Answer: B. False
Rationale: Water must be delivered at adequate pressure, not inadequate pressure.
3. Utility employees should guard the water supply and facilities from contamination, public tours,
and even terrorism.
A. True
B. False
Correct Answer: B. False
Rationale: Utilities should protect against contamination and terrorism, but public tours are not
considered threats when properly supervised.
4. The state requires bacteriological sample results be kept _____ years.
A. 2 years
B. 3 years
C. 5 years
D. 10 years
Correct Answer: C. 5 years
Rationale: Texas regulations require bacteriological records to be retained for 5 years.
5. The state requires chemical analysis be kept at least _____ years.
A. 3 years
, Page 2 of 18
May 8, 2026
B. 5 years
C. 7 years
D. 10 years
Correct Answer: D. 10 years
Rationale: Chemical analysis records must be retained for a minimum of 10 years.
6. EPA requires a water system to keep a copy of each consumer confidence report at least _____
years.
A. 2 years
B. 3 years
C. 5 years
D. 10 years
Correct Answer: C. 5 years
Rationale: Consumer Confidence Reports (CCR) must be retained for 5 years.
7. A public water system provides the public with piped water for human consumption, serves at least
_____ service connections, and regularly serves at least _____ individuals daily at least _____ days out
of the year.
A. / 30
B. / 60
C. / 90
D. / 120
Correct Answer: B. / 60
Rationale: This is the EPA and TCEQ definition of a public water system.
8. The water utility field affects everyone because _____.
A. water is used for recreation
B. water is essential to life and health
C. water is inexpensive
D. water systems create jobs
Correct Answer: B. water is essential to life and health
Rationale: Safe water is critical for public health and survival.
9. The water utility employee should remember customers are entitled to _____.
A. free service and reduced bills
B. courteous treatment and answers to questions about water
C. unlimited water use
D. priority service
, Page 3 of 18
May 8, 2026
Correct Answer: B. courteous treatment and answers to questions about water
Rationale: Professional customer service is a major responsibility of utility employees.
10. In Texas, water operator licensing is administered by the _____.
A. EPA
B. OSHA
C. USDA
D. TCEQ
Correct Answer: D. TCEQ
Rationale: The Texas Commission on Environmental Quality oversees operator licensing.
11. All public water systems are required to employ licensed operators even if the system only _____
treated water bought from another source.
A. stores
B. chlorinates
C. redistributes
D. tests
Correct Answer: C. redistributes
Rationale: Even systems distributing purchased treated water require licensed operators.
12. Public water systems include cities, municipal utility districts, rural water supply corporations,
mobile home parks, and _____.
A. golf courses
B. factories
C. campgrounds
D. warehouses
Correct Answer: C. campgrounds
Rationale: Campgrounds serving sufficient people are classified as public water systems.
13. Examples of community water systems include ________.
A. municipalities
B. municipal utility districts
C. rural water supply corporations
D. mobile home parks
E. all of the above
Correct Answer: E. all of the above
Rationale: All listed examples are recognized community water systems.
