Class D Water Operator License Exam TCEQ EXAM Questions with 100%
Correct Answers | Verified | Updated (Actual Exam) 2025\2026
1. T/F: In Texas, about 75% of all water is used for com- True
mercial, industrial, or agricultural purposes.
2. Water covers approximately ________ of Earth's sur- 71%
face.
3. Drought is an extended period when a region receives atmospheric, ground, or
a deficiency in its ________ water supply. surface
4. T/F: Only about 1 gallon of tap water per person/day True
is used for drinking and cooking
5. Excluding outside water use, the average household 2,000
uses about _______ gallons of water per month for
inside use
6. T/F: Only 3% of all the fresh water on earth can be False (only 1%)
easily accessed for use.
7. T/F: In 1978, the Texas Department of Health (TDH) True
assumed primacy over the Safe Drinking Water Act
from the EPA.
8. T/F: PWS officials should be pro-active in their ap- True
proach to terrorism.
9. _________ permits the owner of a well to pump as much Rule of Capture
water as desired, even if the water is drained from
beneath the land of others.
10. In Texas, agricultural water demand accounts for 57%
about ___% of the total water used.
, Class D Water Operator License Exam TCEQ EXAM Questions with 100%
Correct Answers | Verified | Updated (Actual Exam) 2025\2026
11. T/F: An example of a non-transient non-community True
PWS is a rural school.
12. Monitoring average and maximum daily water ______ Demand
enables us to plan ahead for growth.
13. T/F: The Safe Drinking Water Act sets standards for True
drinking water including physical, chemical, bacterio-
logical, and radiological characteristics.
14. "Potable" means water is safe to drink and has a mea- Residual
surable chlorine ________.
15. The plant operator is responsible for a sufficient sup- Palatable
ply of safe and ________ drinking water.
16. T/F: The Texas State Board of Fire Insurance requires False (130 gals per person
utilities that provide fire protection to have a mini- per day)
mum amount of water available based on 30 gals per
person per day.
17. T/F: The primary state regulator of water utilities is the True
TCEQ.
18. T/F: All community and non-transient non-community True
PWS, regardless of source of water, must be under the
supervision of a licensed water works operator.
19. Meter readers bring in operating revenue and pro- Public
foundly impact _____ relations.
20. The federal regulator of drinking water is the _____. EPA
, Class D Water Operator License Exam TCEQ EXAM Questions with 100%
Correct Answers | Verified | Updated (Actual Exam) 2025\2026
21. T/F: Duties of distribution operator include repairing False (Repair leaks, Make
leaks, making taps, flushing mains, and taking radio- taps, Flush mains, Oper-
logical samples. ate pumps, Take *bacteri-
ological* samples)
22. A service area has 1000 service connections. What can 3,000 (multiply connec-
we estimate the population of this service area to be? tions x 3)
23. T/F: The State must be notified after an existing facility False (must notify *be-
is changed or after construction of a new facility. fore*)
24. T/F: A Class "D" license is valid for 2 years at ground False (3 years)
and purchase water systems with 250 connections or
less.
25. T/F: The physical characteristics of water are color, True
taste, odor, temperature, and turbidity.
26. An alkaline or basic solution has a pH greater than 7
____.
27. T/F: The terms mg/L and ppm are not interchange- False (they are inter-
able. changeable)
28. Suspended solids in water cannot be filtered out. False (they can)
29. Solids, water hardness, pH and gases are ____ charac- Chemical
teristics.
30. T/F: There are 2 hydrogen atoms and 1 oxygen atom True
in each water molecule.
31.
Correct Answers | Verified | Updated (Actual Exam) 2025\2026
1. T/F: In Texas, about 75% of all water is used for com- True
mercial, industrial, or agricultural purposes.
2. Water covers approximately ________ of Earth's sur- 71%
face.
3. Drought is an extended period when a region receives atmospheric, ground, or
a deficiency in its ________ water supply. surface
4. T/F: Only about 1 gallon of tap water per person/day True
is used for drinking and cooking
5. Excluding outside water use, the average household 2,000
uses about _______ gallons of water per month for
inside use
6. T/F: Only 3% of all the fresh water on earth can be False (only 1%)
easily accessed for use.
7. T/F: In 1978, the Texas Department of Health (TDH) True
assumed primacy over the Safe Drinking Water Act
from the EPA.
8. T/F: PWS officials should be pro-active in their ap- True
proach to terrorism.
9. _________ permits the owner of a well to pump as much Rule of Capture
water as desired, even if the water is drained from
beneath the land of others.
10. In Texas, agricultural water demand accounts for 57%
about ___% of the total water used.
, Class D Water Operator License Exam TCEQ EXAM Questions with 100%
Correct Answers | Verified | Updated (Actual Exam) 2025\2026
11. T/F: An example of a non-transient non-community True
PWS is a rural school.
12. Monitoring average and maximum daily water ______ Demand
enables us to plan ahead for growth.
13. T/F: The Safe Drinking Water Act sets standards for True
drinking water including physical, chemical, bacterio-
logical, and radiological characteristics.
14. "Potable" means water is safe to drink and has a mea- Residual
surable chlorine ________.
15. The plant operator is responsible for a sufficient sup- Palatable
ply of safe and ________ drinking water.
16. T/F: The Texas State Board of Fire Insurance requires False (130 gals per person
utilities that provide fire protection to have a mini- per day)
mum amount of water available based on 30 gals per
person per day.
17. T/F: The primary state regulator of water utilities is the True
TCEQ.
18. T/F: All community and non-transient non-community True
PWS, regardless of source of water, must be under the
supervision of a licensed water works operator.
19. Meter readers bring in operating revenue and pro- Public
foundly impact _____ relations.
20. The federal regulator of drinking water is the _____. EPA
, Class D Water Operator License Exam TCEQ EXAM Questions with 100%
Correct Answers | Verified | Updated (Actual Exam) 2025\2026
21. T/F: Duties of distribution operator include repairing False (Repair leaks, Make
leaks, making taps, flushing mains, and taking radio- taps, Flush mains, Oper-
logical samples. ate pumps, Take *bacteri-
ological* samples)
22. A service area has 1000 service connections. What can 3,000 (multiply connec-
we estimate the population of this service area to be? tions x 3)
23. T/F: The State must be notified after an existing facility False (must notify *be-
is changed or after construction of a new facility. fore*)
24. T/F: A Class "D" license is valid for 2 years at ground False (3 years)
and purchase water systems with 250 connections or
less.
25. T/F: The physical characteristics of water are color, True
taste, odor, temperature, and turbidity.
26. An alkaline or basic solution has a pH greater than 7
____.
27. T/F: The terms mg/L and ppm are not interchange- False (they are inter-
able. changeable)
28. Suspended solids in water cannot be filtered out. False (they can)
29. Solids, water hardness, pH and gases are ____ charac- Chemical
teristics.
30. T/F: There are 2 hydrogen atoms and 1 oxygen atom True
in each water molecule.
31.
