Class "C" Water Final Exam TCEQ Class C Water License Questions and Answers
1. Calcium Hypochlorite: A common chemical used in the disenfection of a small water supply
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is-
2. A Cross Connection: Aphysicalconnectionbetweena potable watersupplyand a house well w
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ould be- j
3. Demand: The amount of Chlorine in mg/L that is used by reacting with iron, organics, or b
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acteria is called? j j
4. GreenishYellowcolor He j j j
avier than airj j
Pungent, Penetrating odor j j
Corrosive: All of the following are Physical characteristics of Chlorine gas-
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5. Solution feed pump: Which of the following would be considered a part of a hypo-
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chlorinator system? j
6. Flow measuring device: According to state requirements, all public water supply wells should
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be provided with a raised concrete sealing block, screened vents and-
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7. The difference in static and pumping levels: The drawdown of a water well is determined by-
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8. If it is more acidic or base: The pH of water indicates-
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9. 0-14: The pH of water is expressed by a scale of numbers ranging from-
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10. 7.0: Water that is considered neutral is expressed on the pH scale at-
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11. Use of an approved,sterile container: Whichof thefollowingis arequiredstep in collecting a r
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outine distribution sample for bacteriological testing?
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12. Turbidity: Sand filtration will remove which of the following from surface water? j j j j j j j j j j j
13. Taste and Odor control:Activated Carbon is used in a SurfaceWater Plant primarily for?
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14. Alum and Ferric Chloride: Which of the following chemical(s) are commonly used as coag
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ulants in surface water treatment?
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15. ScreenedVents j
An approved locking roof hatch
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An overflow pipe with hinged flap device
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Annual inspection and maintenance as needed: Ground storage tanks are re-
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1j/j19
,quired to be provided with which of the following?
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16. Painting Cathodicp j j
rotection
Water stabilization: An elevated storage tank should be protected against corro- sion by-
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17. 35psi:Apublicwatersupplysystemshouldmaintainresidualpressureof20psi and a minimu
j j j j j j j j j j j j j j j j
m normal operating pressure of-
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, 18. 50 mg/L: Before a new or repaired water line is placed into service, it must be properly disinf
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ected by providing a chlorine dosage of and proper detention time.
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19. Aquifers: Water bearing formations beneath the earth's surface that are used as a source o j j j j j j j j j j j j j j
f water for public water supplies are-
j j j j j j
20. Determine water levels in the well: The purpose of an air line on a well is- j j j j j j j j j j j j j j j
21. Reduce the amount of sand pumped: The mesh size is an important feature of a well scree
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n because property sized openings should-
j j j j j
22. pH,alkalinity,temperature, and chemical dosage:When treating surface water, the pr
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ocess of coagulation will be most affected by the-
j j j j j j j j
23. When the loss of head gauge indicated between 6 and 10 ft.: A rapid sand filter should be
j j j j j j j j j j j j j j j j j j
backwashed when- j
24. 0.2 mg/L free chlorine residual j j j j
0.5 mg/L chloramine residual for a surface water supply
j j j j j j j j
0.8 mg/L chloramine residual when using chloramine treatment
j j j j j j j
0.5 mg/L freechlorine residual for a groundwater supply: Whichofthefollowing is an acceptable
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disinfection residual at the far reaches of the distribution system- j j j j j j j j j
25. 8.34 lbs: One gallon of water weighs- j j j j j j
26. .433 lbs: One foot of water inside a storage vessel will raise a pressure gauge at the bottom o
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f the vessel by-
j j j
27. 1000 ft: A raw water intake structure may not be constructed within
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feet of a boat ramp, dock, or marina j j j j j j j
28. VerticalTurbine j
Submersible: CommonType(s) of pump(s) for use in water wells are- j j j j j j j j j j
29. Hydrological Cycle: is the natural exchange of water between the earth and air. j jj j j j j j j j j j j j j
30. 24 hours: If and when a health hazard contamination event occurs in a public water system
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, the operator must contact the state regulatory authority within hours by telephone.
j j j j j j j j j jj j j j j
31. Maintained at adequate pressure Path j j j j
ogen free j
Contains a chlorine residual: Potable water is that of- j j j j j j j j
32. Blue babies: Excessive nitrates in drinking water can cause a condition that affects infant
j j j j j j j j j j j j j
s under the age of 6 months.This condition is known as-
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3j/j19
1. Calcium Hypochlorite: A common chemical used in the disenfection of a small water supply
j j j j j j j j j j j j j j
is-
2. A Cross Connection: Aphysicalconnectionbetweena potable watersupplyand a house well w
j j j j j j j j j j j j j j j
ould be- j
3. Demand: The amount of Chlorine in mg/L that is used by reacting with iron, organics, or b
j j j j j j j j j j j j j j j j
acteria is called? j j
4. GreenishYellowcolor He j j j
avier than airj j
Pungent, Penetrating odor j j
Corrosive: All of the following are Physical characteristics of Chlorine gas-
j j j j j j j j j j
5. Solution feed pump: Which of the following would be considered a part of a hypo-
j j j j j j j j j j j j j j
chlorinator system? j
6. Flow measuring device: According to state requirements, all public water supply wells should
j j j j j j j j j j j j j
be provided with a raised concrete sealing block, screened vents and-
j j j j j j j j j j
7. The difference in static and pumping levels: The drawdown of a water well is determined by-
j j j j j j j j j j j j j j j
8. If it is more acidic or base: The pH of water indicates-
j j j j j j j j j j j
9. 0-14: The pH of water is expressed by a scale of numbers ranging from-
j j j j j j j j j j j j j
10. 7.0: Water that is considered neutral is expressed on the pH scale at-
j j j j j j j j j j j j
11. Use of an approved,sterile container: Whichof thefollowingis arequiredstep in collecting a r
j j j j j j j j j j j j j j j j j
outine distribution sample for bacteriological testing?
j j j j j
12. Turbidity: Sand filtration will remove which of the following from surface water? j j j j j j j j j j j
13. Taste and Odor control:Activated Carbon is used in a SurfaceWater Plant primarily for?
j j j j j j j j j j j j j j
14. Alum and Ferric Chloride: Which of the following chemical(s) are commonly used as coag
j j j j j j j j j j j j j
ulants in surface water treatment?
j j j j
15. ScreenedVents j
An approved locking roof hatch
j j j j
An overflow pipe with hinged flap device
j j j j j j
Annual inspection and maintenance as needed: Ground storage tanks are re-
j j j j j j j j j j
1j/j19
,quired to be provided with which of the following?
j j j j j j j j j
16. Painting Cathodicp j j
rotection
Water stabilization: An elevated storage tank should be protected against corro- sion by-
j j j j j j j j j j j j
17. 35psi:Apublicwatersupplysystemshouldmaintainresidualpressureof20psi and a minimu
j j j j j j j j j j j j j j j j
m normal operating pressure of-
j j j j
2j/j19
, 18. 50 mg/L: Before a new or repaired water line is placed into service, it must be properly disinf
j j j j j j j j j j j j j j j j j
ected by providing a chlorine dosage of and proper detention time.
j j j j j j jj j j j j j
19. Aquifers: Water bearing formations beneath the earth's surface that are used as a source o j j j j j j j j j j j j j j
f water for public water supplies are-
j j j j j j
20. Determine water levels in the well: The purpose of an air line on a well is- j j j j j j j j j j j j j j j
21. Reduce the amount of sand pumped: The mesh size is an important feature of a well scree
j j j j j j j j j j j j j j j j
n because property sized openings should-
j j j j j
22. pH,alkalinity,temperature, and chemical dosage:When treating surface water, the pr
j j j j j j j j j j j
ocess of coagulation will be most affected by the-
j j j j j j j j
23. When the loss of head gauge indicated between 6 and 10 ft.: A rapid sand filter should be
j j j j j j j j j j j j j j j j j j
backwashed when- j
24. 0.2 mg/L free chlorine residual j j j j
0.5 mg/L chloramine residual for a surface water supply
j j j j j j j j
0.8 mg/L chloramine residual when using chloramine treatment
j j j j j j j
0.5 mg/L freechlorine residual for a groundwater supply: Whichofthefollowing is an acceptable
j j j j j j j j j j j j j j j
disinfection residual at the far reaches of the distribution system- j j j j j j j j j
25. 8.34 lbs: One gallon of water weighs- j j j j j j
26. .433 lbs: One foot of water inside a storage vessel will raise a pressure gauge at the bottom o
j j j j j j j j j j j j j j j j j j
f the vessel by-
j j j
27. 1000 ft: A raw water intake structure may not be constructed within
j j j j j j j j j j j j
feet of a boat ramp, dock, or marina j j j j j j j
28. VerticalTurbine j
Submersible: CommonType(s) of pump(s) for use in water wells are- j j j j j j j j j j
29. Hydrological Cycle: is the natural exchange of water between the earth and air. j jj j j j j j j j j j j j j
30. 24 hours: If and when a health hazard contamination event occurs in a public water system
j j j j j j j j j j j j j j j
, the operator must contact the state regulatory authority within hours by telephone.
j j j j j j j j j jj j j j j
31. Maintained at adequate pressure Path j j j j
ogen free j
Contains a chlorine residual: Potable water is that of- j j j j j j j j
32. Blue babies: Excessive nitrates in drinking water can cause a condition that affects infant
j j j j j j j j j j j j j
s under the age of 6 months.This condition is known as-
j j j j j j j j j j j
3j/j19
