Water Operator Class D Study Guide
Comprehensive Resource To Help You Ace 2026-2027
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!!
Current Update!!
1. The chemical symbol for water - Correct Answer: H2O
2. Three forms of water - Correct Answer: solid(ice); liquid(water); water(vapor/gas)
3. Hydrological cycle - Correct Answer: the natural exchange of water between the
earth and atmosphere
4. Average water use depends on these 5 things - Correct Answer: temperature;
rainfall; cost; supply; economic level
5. Ground Water is located - Correct Answer: located below the earth's surface
(underground)
6. Name the three places that surface water comes from. - Correct Answer: rivers;
lakes; reservoirs
7. According to the TCEQ, future water supplies will be - Correct Answer: more scarce
8. Raw Water - Correct Answer: Surface water or ground water prior to treatment
,9. Ground water is tapped by - Correct Answer: wells
10. Potable water - Correct Answer: water that is free of disease-causing organisms, has
a chlorine residual and is safe for human consumption
11. Before construction, the utility must submit engineering plans to - Correct Answer:
the AWWA
12. Operators should keep records of 5 types of things - Correct Answer: water usage;
system pressure; sample results; repairs; amount of chlorine used
13. Reports by Surface water systems must be received by the TCEQ at this location -
Correct Answer: Austin
14. Reports for Surface water systems must be received by the TCEQ by - Correct
Answer: the 15th of the following month
15. How often are ground water systems are required to compile reports? - Correct
Answer: monthly
16. Reports for Ground Water Systems must be kept for... - Correct Answer: inspection
or review but are not required to mail them in
17. Types of systems that are not required to compile monthly reports - Correct Answer:
Ground Water & Surface Water that serve less than 100 connections
18. Water is never found in nature with this characteristic - Correct Answer: pure
,19. Name the 5 physical characteristics of water - Correct Answer: Temperature;
Turbidity; Color; Taste and Odor
20. Chemical Characteristics of water - Correct Answer: Hardness; pH; Solids; Gases
21. Turbidity - Correct Answer: the amount of suspended matter such as clay, silt,
organic matter and microorganisms in water
22. Color in water can result from - Correct Answer: mineral or organic matter
23. True color - Correct Answer: dissolved in water; cannot be removed by filtering
24. Apparent Color - Correct Answer: suspended in water; can be filtered out
25. an example of true color - Correct Answer: tea
26. an example of apparent color - Correct Answer: red water caused by oxidized iron
27. algae; bacteria; organic matter; gases; and chemicals give what to water - Correct
Answer: taste and color
28. chemicals in water are measured in - Correct Answer: mg/L
29. mg/L - Correct Answer: milligrams per liter
, 30. How often should surface water be sampled for chemical analysis? - Correct Answer:
once a year
31. How often should ground water be sampled for chemical analysis? - Correct Answer:
every 3 years
32. Hardness is caused by - Correct Answer: calcium and magnesium and other minerals
33. The pH scale ranges from - Correct Answer: 0 to 14
34. acidic on the pH scale is (number range) - Correct Answer: from 0 to 7
35. basic on the pH scale is - Correct Answer: from 7 to 14
36. neutral on the pH scales is - Correct Answer: 7
37. Solids that can be removed by filtering - Correct Answer: suspended
38. Solids that cannot be removed by filtering - Correct Answer: dissolved
39. Name 3 Common gases found in water - Correct Answer: hydrogen sulfide; carbon
dioxide; methane
40. chemically water is made up of - Correct Answer: two atoms hydrogen; one atom
oxygen
Comprehensive Resource To Help You Ace 2026-2027
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!!
Current Update!!
1. The chemical symbol for water - Correct Answer: H2O
2. Three forms of water - Correct Answer: solid(ice); liquid(water); water(vapor/gas)
3. Hydrological cycle - Correct Answer: the natural exchange of water between the
earth and atmosphere
4. Average water use depends on these 5 things - Correct Answer: temperature;
rainfall; cost; supply; economic level
5. Ground Water is located - Correct Answer: located below the earth's surface
(underground)
6. Name the three places that surface water comes from. - Correct Answer: rivers;
lakes; reservoirs
7. According to the TCEQ, future water supplies will be - Correct Answer: more scarce
8. Raw Water - Correct Answer: Surface water or ground water prior to treatment
,9. Ground water is tapped by - Correct Answer: wells
10. Potable water - Correct Answer: water that is free of disease-causing organisms, has
a chlorine residual and is safe for human consumption
11. Before construction, the utility must submit engineering plans to - Correct Answer:
the AWWA
12. Operators should keep records of 5 types of things - Correct Answer: water usage;
system pressure; sample results; repairs; amount of chlorine used
13. Reports by Surface water systems must be received by the TCEQ at this location -
Correct Answer: Austin
14. Reports for Surface water systems must be received by the TCEQ by - Correct
Answer: the 15th of the following month
15. How often are ground water systems are required to compile reports? - Correct
Answer: monthly
16. Reports for Ground Water Systems must be kept for... - Correct Answer: inspection
or review but are not required to mail them in
17. Types of systems that are not required to compile monthly reports - Correct Answer:
Ground Water & Surface Water that serve less than 100 connections
18. Water is never found in nature with this characteristic - Correct Answer: pure
,19. Name the 5 physical characteristics of water - Correct Answer: Temperature;
Turbidity; Color; Taste and Odor
20. Chemical Characteristics of water - Correct Answer: Hardness; pH; Solids; Gases
21. Turbidity - Correct Answer: the amount of suspended matter such as clay, silt,
organic matter and microorganisms in water
22. Color in water can result from - Correct Answer: mineral or organic matter
23. True color - Correct Answer: dissolved in water; cannot be removed by filtering
24. Apparent Color - Correct Answer: suspended in water; can be filtered out
25. an example of true color - Correct Answer: tea
26. an example of apparent color - Correct Answer: red water caused by oxidized iron
27. algae; bacteria; organic matter; gases; and chemicals give what to water - Correct
Answer: taste and color
28. chemicals in water are measured in - Correct Answer: mg/L
29. mg/L - Correct Answer: milligrams per liter
, 30. How often should surface water be sampled for chemical analysis? - Correct Answer:
once a year
31. How often should ground water be sampled for chemical analysis? - Correct Answer:
every 3 years
32. Hardness is caused by - Correct Answer: calcium and magnesium and other minerals
33. The pH scale ranges from - Correct Answer: 0 to 14
34. acidic on the pH scale is (number range) - Correct Answer: from 0 to 7
35. basic on the pH scale is - Correct Answer: from 7 to 14
36. neutral on the pH scales is - Correct Answer: 7
37. Solids that can be removed by filtering - Correct Answer: suspended
38. Solids that cannot be removed by filtering - Correct Answer: dissolved
39. Name 3 Common gases found in water - Correct Answer: hydrogen sulfide; carbon
dioxide; methane
40. chemically water is made up of - Correct Answer: two atoms hydrogen; one atom
oxygen
