Class D Water Operator License Exam TCEQ
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1. T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes.: True
2. Water covers approximately ________ of Earth's surface.: 71%
3. Drought is an extended period when a region receives a deficiency in its
________ water supply.: atmospheric, ground, or surface
4. T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking: True
5. Excluding outside water use, the average household uses about _______
gallons of water per month for inside use: 2,000
6. T/F: Only 3% of all the fresh water on earth can be easily accessed for
use.: False (only 1%)
7. T/F: In 1978, the Texas Department of Health (TDH) assumed primacy over
the Safe Drinking Water Act from the EPA.: True
8. T/F: PWS officials should be pro-active in their approach to terrorism.: True
9. _________ permits the owner of a well to pump as much water as desired,
even if the water is drained from beneath the land of others.: Rule of Capture
10. In Texas, agricultural water demand accounts for about ___% of the total
water used.: 57%
11. T/F: An example of a non-transient non-community PWS is a rural school.-
: True
12. Monitoring average and maximum daily water ______ enables us to plan
ahead for growth.: Demand
13. T/F: The Safe Drinking Water Act sets standards for drinking water includ-
ing physical, chemical, bacteriological, and radiological characteristics.: True
14. "Potable" means water is safe to drink and has a measurable chlorine
________.: Residual
15. The plant operator is responsible for a sufficient supply of safe and
________ drinking water.: Palatable
16. T/F: The Texas State Board of Fire Insurance requires utilities that provide
fire protection to have a minimum amount of water available based on 30 gals
per person per day.: False (130 gals per person per day)
17. T/F: The primary state regulator of water utilities is the TCEQ.: True
18. T/F: All community and non-transient non-community PWS, regardless of
source of water, must be under the supervision of a licensed water works
operator.: True
19. Meter readers bring in operating revenue and profoundly impact _____
relations.: Public
20. The federal regulator of drinking water is the _____.: EPA
, Class D Water Operator License Exam TCEQ
Study online at https://quizlet.com/_61vs5a
21. T/F: Duties of distribution operator include repairing leaks, making taps,
flushing mains, and taking radiological samples.: False (Repair leaks, Make
taps, Flush mains, Operate pumps, Take *bacteriological* samples)
22. A service area has 1000 service connections. What can we estimate the
population of this service area to be?: 3,000 (multiply connections x 3)
23. T/F: The State must be notified after an existing facility is changed or after
construction of a new facility.: False (must notify *before*)
24. T/F: A Class "D" license is valid for 2 years at ground and purchase water
systems with 250 connections or less.: False (3 years)
25. T/F: The physical characteristics of water are color, taste, odor, tempera-
ture, and turbidity.: True
26. An alkaline or basic solution has a pH greater than ____.: 7
27. T/F: The terms mg/L and ppm are not interchangeable.: False (they are
interchangeable)
28. Suspended solids in water cannot be filtered out.: False (they can)
29. Solids, water hardness, pH and gases are ____ characteristics.: Chemical
30. T/F: There are 2 hydrogen atoms and 1 oxygen atom in each water mole-
cule.: True
31. T/F: The State recommends a water pH of less than 7 to be maintained at all
time.: False (The state recommends a pH slightly greater than 7 and for the water
to be non-corrosive.)
32. T/F: Taste and odor can come from organisms such as vegetation, bacteria,
and algae, and from certain chemicals and metals.: True
33. T/F: The deeper the well, the warmer the water.: True
34. T/F: The threshold odor number (TON) relates to the number of dilutions
needed for the water to be tasteless.: False (It reflects the number of dilutions
needed for water sample to be *odorless*)
35. One part per million or 1 mg/L means that for every ____ pounds of water
there is one pound of material in it.: 1 million
36. The State requires filtered water to be equal to or less than ____ turbidity
units in at least 95% of the monthly samples.: 0.3
37. The State recommends a TON of ___ or less.: 3
38. T/F: The State recommends 20 color units or less for a quality water.: False
(The state recommends 15 units of color or less for drinking water.)
39. T/F: Examples of inorganic matter found in water include rock, sand,
metals, and minerals.: True
40. T/F: The red color caused by iron is an example of suspended or apparent
color and it can be removed by filtration.: True
Study online at https://quizlet.com/_61vs5a
1. T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes.: True
2. Water covers approximately ________ of Earth's surface.: 71%
3. Drought is an extended period when a region receives a deficiency in its
________ water supply.: atmospheric, ground, or surface
4. T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking: True
5. Excluding outside water use, the average household uses about _______
gallons of water per month for inside use: 2,000
6. T/F: Only 3% of all the fresh water on earth can be easily accessed for
use.: False (only 1%)
7. T/F: In 1978, the Texas Department of Health (TDH) assumed primacy over
the Safe Drinking Water Act from the EPA.: True
8. T/F: PWS officials should be pro-active in their approach to terrorism.: True
9. _________ permits the owner of a well to pump as much water as desired,
even if the water is drained from beneath the land of others.: Rule of Capture
10. In Texas, agricultural water demand accounts for about ___% of the total
water used.: 57%
11. T/F: An example of a non-transient non-community PWS is a rural school.-
: True
12. Monitoring average and maximum daily water ______ enables us to plan
ahead for growth.: Demand
13. T/F: The Safe Drinking Water Act sets standards for drinking water includ-
ing physical, chemical, bacteriological, and radiological characteristics.: True
14. "Potable" means water is safe to drink and has a measurable chlorine
________.: Residual
15. The plant operator is responsible for a sufficient supply of safe and
________ drinking water.: Palatable
16. T/F: The Texas State Board of Fire Insurance requires utilities that provide
fire protection to have a minimum amount of water available based on 30 gals
per person per day.: False (130 gals per person per day)
17. T/F: The primary state regulator of water utilities is the TCEQ.: True
18. T/F: All community and non-transient non-community PWS, regardless of
source of water, must be under the supervision of a licensed water works
operator.: True
19. Meter readers bring in operating revenue and profoundly impact _____
relations.: Public
20. The federal regulator of drinking water is the _____.: EPA
, Class D Water Operator License Exam TCEQ
Study online at https://quizlet.com/_61vs5a
21. T/F: Duties of distribution operator include repairing leaks, making taps,
flushing mains, and taking radiological samples.: False (Repair leaks, Make
taps, Flush mains, Operate pumps, Take *bacteriological* samples)
22. A service area has 1000 service connections. What can we estimate the
population of this service area to be?: 3,000 (multiply connections x 3)
23. T/F: The State must be notified after an existing facility is changed or after
construction of a new facility.: False (must notify *before*)
24. T/F: A Class "D" license is valid for 2 years at ground and purchase water
systems with 250 connections or less.: False (3 years)
25. T/F: The physical characteristics of water are color, taste, odor, tempera-
ture, and turbidity.: True
26. An alkaline or basic solution has a pH greater than ____.: 7
27. T/F: The terms mg/L and ppm are not interchangeable.: False (they are
interchangeable)
28. Suspended solids in water cannot be filtered out.: False (they can)
29. Solids, water hardness, pH and gases are ____ characteristics.: Chemical
30. T/F: There are 2 hydrogen atoms and 1 oxygen atom in each water mole-
cule.: True
31. T/F: The State recommends a water pH of less than 7 to be maintained at all
time.: False (The state recommends a pH slightly greater than 7 and for the water
to be non-corrosive.)
32. T/F: Taste and odor can come from organisms such as vegetation, bacteria,
and algae, and from certain chemicals and metals.: True
33. T/F: The deeper the well, the warmer the water.: True
34. T/F: The threshold odor number (TON) relates to the number of dilutions
needed for the water to be tasteless.: False (It reflects the number of dilutions
needed for water sample to be *odorless*)
35. One part per million or 1 mg/L means that for every ____ pounds of water
there is one pound of material in it.: 1 million
36. The State requires filtered water to be equal to or less than ____ turbidity
units in at least 95% of the monthly samples.: 0.3
37. The State recommends a TON of ___ or less.: 3
38. T/F: The State recommends 20 color units or less for a quality water.: False
(The state recommends 15 units of color or less for drinking water.)
39. T/F: Examples of inorganic matter found in water include rock, sand,
metals, and minerals.: True
40. T/F: The red color caused by iron is an example of suspended or apparent
color and it can be removed by filtration.: True
