CA Water Treatment Plant Operator Trivia Quiz

50 Questions | Total Attempts: 98

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CA Water Treatment Plant Operator Trivia Quiz

Reservoir Management and Intake Structures Water Treatment Plant Operation Volume 1 Sixth Edition Please let me know if there are any issues with the quiz such as typos, wrong answers, etc. .


Questions and Answers
  • 1. 
    Methods of managing lakes and reservoirs used for domestic water supplies very widely depending on local situations.
    • A. 

      True

    • B. 

      False

  • 2. 
    Algae remove carbon dioxide from solution and convert it into cellular material as they grow.
    • A. 

      True

    • B. 

      False

  • 3. 
    Respiration by algae results in an increase in carbon dioxide in water (lowering of pH), while photosynthesis results in a decrease in water (increasing of pH)
    • A. 

      True

    • B. 

      False

  • 4. 
    Fish kills from dead algae can be the result of the algae stimulating the gills of the fish.
    • A. 

      True

    • B. 

      False

  • 5. 
    Organics released using decomposition of flooded trees and brush may contribute to increased color, chlorine demand, and trihalomethane levels following chlorination.
    • A. 

      True

    • B. 

      False

  • 6. 
    Regulated general use of pesticides and herbicides can cause serious problems of contamination in domestic water supply reservoirs.
    • A. 

      True

    • B. 

      False

  • 7. 
    Storm water runoff from highways has the potential to cause adverse impacts on reservoir water quality.
    • A. 

      True

    • B. 

      False

  • 8. 
    Alkalinity of the water is the principal factor that increases the effectiveness of copper sulfate.
    • A. 

      True

    • B. 

      False

  • 9. 
    After an algal bloom occurs, it is very easy to control the bloom and correct the bad effects on water quality.
    • A. 

      True

    • B. 

      False

  • 10. 
    Careful evaluation of reservoir monitoring must be made to determine if algae die-offs actually occur as a result of chemical application or if they simply die off due to natural circumstances.
    • A. 

      True

    • B. 

      False

  • 11. 
    With complete destratification, surface waters are warmed and deeper waters are cooled until an equilibrium is reached and the temperatures are nearly equal from top to bottom.
    • A. 

      True

    • B. 

      False

  • 12. 
    Under freezing conditions, the heaveist (most dense) water is on the bottom and is warmer than surface water.
    • A. 

      True

    • B. 

      False

  • 13. 
    Records provide the basic foundation upon which management programs are designed, implemented, and evaluated.
    • A. 

      True

    • B. 

      False

  • 14. 
    Safety hazards involved in water quality sampling may be much less than those encountered within the laboratory.
    • A. 

      True

    • B. 

      False

  • 15. 
    To obtain good water quality from a water supply reservoir, it may be necessary to draw water from different levels during different seasons of the year.
    • A. 

      True

    • B. 

      False

  • 16. 
    Intake structures andrelated facilities should be inspected, operated, and tested periodically, preferably at regular intervals.
    • A. 

      True

    • B. 

      False

  • 17. 
    What is nutrient?
    • A. 

      Any substance that is assimilated (taken in) by organisms and promotes growth

    • B. 

      That portion of a body of fresh water extending from the shoreline lakeward to the limit of occupancy of rooted plants

    • C. 

      The almost spontaneous mixing of all layers of water in a reservoir or lake

    • D. 

      The minimum odor of a water sample that can just be detected after successive dilutions with odorless water

  • 18. 
    What is a littoral zone?
    • A. 

      Any substance that is assimilated (taken in) by organisms and promotes growth

    • B. 

      That portion of a body of fresh water extending from the shoreline lakeward to the limit of occupancy of rooted plants

    • C. 

      The almost spontaneous mixing of all layers of water in a reservoir or lake

    • D. 

      The minimum odor of a water sample that can just be detected after successive dilutions with odorless water

  • 19. 
    What are the most notable impacts on water supply reservoirs as a result of increases in organic loading caused by algal blooms?
    • A. 

      Increased color in the water supply and a major increase in chlorine demand

    • B. 

      Increase depth of the thermocline layer

    • C. 

      Increased levels of iron and manganese

    • D. 

      Increased pH in the water supply and an increase in dissolved oxygen

  • 20. 
    What causes high trihalomethane (THM) levels?
    • A. 

      Chlorination in the absence of THM precursors

    • B. 

      Chlorination of methane from anaerobic decomposition

    • C. 

      Insufficient algae present in the water supply

    • D. 

      Organic loading resulting from algal blooms and free residual chlorination

  • 21. 
    Why should dissolved oxygen depletion be controlled or eliminated within the metalimnion of water supply lakes and reservoirs
    • A. 

      To eliminate or control algal blooms

    • B. 

      To eliminate or control iron, manganese, and hydrogen sulfide problems

    • C. 

      To eliminate or control nutrients

    • D. 

      To eliminate or control pH fluctuations

  • 22. 
    What is the primary purpose of any watershed management program?
    • A. 

      To collect and record changes or trends in water quality

    • B. 

      To control, minimize, or eliminate any practice within the watershed area that are harmful to water quality

    • C. 

      To enhance recreational benefits of the water supply lake or reservoir

    • D. 

      To maintain or increase property values around the lake or reservoir

  • 23. 
    Why is copper sulfate effective as an algicide at low levels of alkalinity?
    • A. 

      Because algae are more susceptible to algicides at low levels of alkalinity

    • B. 

      Because copper ions react with bicarbonate and carbonate ions to form insoluble complexes that precipitate from solution

    • C. 

      Because copper sulfate costs less at low levels of alkalinity

    • D. 

      Because of the high levels of biologically active copper

  • 24. 
    Why must the operator have a reservoir monitoring program in reservoirs where algae are a potential problem?
    • A. 

      To anticipate a possible algal bloom

    • B. 

      To inform the local news media of the status of the algae

    • C. 

      To issue boil water notices

    • D. 

      To notify regulatory agencies of potential blooms

  • 25. 
    Which chemical is being considered as an alternative algicide to copper sulfate?
    • A. 

      Ammonia-based herbicides

    • B. 

      Ferric-based herbicides

    • C. 

      Hydrogen-peroxide-based herbicides

    • D. 

      Polyphosphate-based herbicides

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