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California Grade 1 Water Distribution O&M Certification
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1. What does the intrusion of seawater Overpumping fresh water (think: sucking the water
into groundwater basins out of the aquifer allows the seawater to seep in
result from? through the ground walls)
2. What is stratification in lakes and The formation of separate layers of temperature,
reservoirs? plant life, or animal life
3. What causes the elevation, slope of Season variations in the supply of water
the water
tables, and artesian pressure levels
to change?
4. What is the main thing that is con- The potential exposure to the public
sidered when deciding how exten-
sive the treatment should be for re-
claimed water?
5. The water distribution system must - max demands
have sufficient capacity to meet - firefighting requirements
which three things? - maintaining adequate water pressures throughout
the system.
6. Difference between primary and - Primary regulations are mandatory limits
secondary drinking water regula- - Secondary regulations are guidelines
tions?
7. What is palatable water? Water at a desirable temperature that is free from
objectionable tastes, odors, colors, and turbidity
8. Factors that may cause water quality - cross connection
degradation? - corrosion
- biological growth and activity
- high temperatures
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California Grade 1 Water Distribution O&M Certification
Study online at https://quizlet.com/_jcdf2a
- unusual flows
- time in the system
- dead ends
- age of the facilities
- operational procedures
9. Why is it that once groundwaters The slow movement of water in/through the ground
are contaminated, it normally takes
a considerable time before they re-
cover?
10. What are the two causes of backflow Backpressure and backsiphonage
through a cross-connection?
11. Which form of chlorine is most effec- Chloramines
tive against biofilms?
12. An example of careless operating - inadequate cross connection control
procedure that contributes to the - poorly performed water quality monitoring and
degradation of water quality in dis- flushing programs
tribution systems? - tolerance of low or negative pressures in the distri-
bution system
- insufficient surveillance to determine whether the
features for storage facilities and mains are ade-
quate
- inadequate disinfection after a repair or installation
of new facilities
13. What influences the potential for Integrity of the coating on the pipes
corrosion in metal or asbestos pipe
that is lined with asphalt or coal tar?
14. At least twice a month
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California Grade 1 Water Distribution O&M Certification
Study online at https://quizlet.com/_jcdf2a
How often should reservoirs be in-
spected?
15. Why are uncovered reservoirs often They are subject to contamination from many sources
prohibited?
16. What is an important aspect of a Ensuring adequate turnover of water in the tank
tank inspection and maintenance
program?
17. Why should an operation and main- To ensure proper setting and operation
tenance (O & M) program include ex-
ercising the valves?
18. What is the responsibility of water To produce safe and pleasant drinking water
treatment plant operators?
19. What do most states require for an Operator Certificate
someone to work as a water treat-
ment plant operator?
20. What contributes to most treatment Carelessness and negligence
plant accidents?
21. What is stratification? the formation of separate layers (of temperature,
plant life, or animal life) in a lake or reservoir - char-
acteristics in each layer are similar
22. What is a benefit of storing water in System flow and pressure are improved and stabi-
a distribution system? lized, which provides better service to customers in
the area
23. Clear Well (after flashmix, flocculation, and media
filters)
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California Grade 1 Water
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Certification Practice
Questions and Answers
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California Grade 1 Water Distribution O&M Certification
Study online at https://quizlet.com/_jcdf2a
1. What does the intrusion of seawater Overpumping fresh water (think: sucking the water
into groundwater basins out of the aquifer allows the seawater to seep in
result from? through the ground walls)
2. What is stratification in lakes and The formation of separate layers of temperature,
reservoirs? plant life, or animal life
3. What causes the elevation, slope of Season variations in the supply of water
the water
tables, and artesian pressure levels
to change?
4. What is the main thing that is con- The potential exposure to the public
sidered when deciding how exten-
sive the treatment should be for re-
claimed water?
5. The water distribution system must - max demands
have sufficient capacity to meet - firefighting requirements
which three things? - maintaining adequate water pressures throughout
the system.
6. Difference between primary and - Primary regulations are mandatory limits
secondary drinking water regula- - Secondary regulations are guidelines
tions?
7. What is palatable water? Water at a desirable temperature that is free from
objectionable tastes, odors, colors, and turbidity
8. Factors that may cause water quality - cross connection
degradation? - corrosion
- biological growth and activity
- high temperatures
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California Grade 1 Water Distribution O&M Certification
Study online at https://quizlet.com/_jcdf2a
- unusual flows
- time in the system
- dead ends
- age of the facilities
- operational procedures
9. Why is it that once groundwaters The slow movement of water in/through the ground
are contaminated, it normally takes
a considerable time before they re-
cover?
10. What are the two causes of backflow Backpressure and backsiphonage
through a cross-connection?
11. Which form of chlorine is most effec- Chloramines
tive against biofilms?
12. An example of careless operating - inadequate cross connection control
procedure that contributes to the - poorly performed water quality monitoring and
degradation of water quality in dis- flushing programs
tribution systems? - tolerance of low or negative pressures in the distri-
bution system
- insufficient surveillance to determine whether the
features for storage facilities and mains are ade-
quate
- inadequate disinfection after a repair or installation
of new facilities
13. What influences the potential for Integrity of the coating on the pipes
corrosion in metal or asbestos pipe
that is lined with asphalt or coal tar?
14. At least twice a month
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California Grade 1 Water Distribution O&M Certification
Study online at https://quizlet.com/_jcdf2a
How often should reservoirs be in-
spected?
15. Why are uncovered reservoirs often They are subject to contamination from many sources
prohibited?
16. What is an important aspect of a Ensuring adequate turnover of water in the tank
tank inspection and maintenance
program?
17. Why should an operation and main- To ensure proper setting and operation
tenance (O & M) program include ex-
ercising the valves?
18. What is the responsibility of water To produce safe and pleasant drinking water
treatment plant operators?
19. What do most states require for an Operator Certificate
someone to work as a water treat-
ment plant operator?
20. What contributes to most treatment Carelessness and negligence
plant accidents?
21. What is stratification? the formation of separate layers (of temperature,
plant life, or animal life) in a lake or reservoir - char-
acteristics in each layer are similar
22. What is a benefit of storing water in System flow and pressure are improved and stabi-
a distribution system? lized, which provides better service to customers in
the area
23. Clear Well (after flashmix, flocculation, and media
filters)
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