Water Treatment Plant Operation Volume 2 Chapter 15

40 Questions | Total Attempts: 487

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Water Treatment Plant Operation Volume 2 Chapter 15 - Quiz

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Questions and Answers
  • 1. 
    A methane is involved in the THM reaction 
    • A. 

      True

    • B. 

      False

  • 2. 
    THM Samples should be sent to the laboratory immediately after they are collected 
    • A. 

      True

    • B. 

      False

  • 3. 
    And understanding of the chemistry of THM formation is crucial if a water solution is to solve the THM problem 
    • A. 

      True

    • B. 

      False

  • 4. 
    The higher the concentrations of free chlorine and natural organics and the water, the more THMs will be produced 
    • A. 

      True

    • B. 

      False

  • 5. 
    Aeration is not effective in removing the more volatile chemicals 
    • A. 

      True

    • B. 

      False

  • 6. 
    Chloromines are weaker disinfectants them free chlorine, but the residuals remain much longer than free chlorine 
    • A. 

      True

    • B. 

      False

  • 7. 
    Ingestion of very high levels of arsenic can cause acute (short term) adverse health effects 
    • A. 

      True

    • B. 

      False

  • 8. 
    The PH of the water is important in determining the arsenic speciation (arsenic (three) or arsenic (V) form ) 
    • A. 

      True

    • B. 

      False

  • 9. 
    Before a blending operation can be implemented, theoretical calculations must be made to determine if blending is feasible and will be an effective solution 
    • A. 

      True

    • B. 

      False

  • 10. 
    The activated alumina  adsorption process for removal of arsenic from drinking water Is not dependent on pH 
    • A. 

      True

    • B. 

      False

  • 11. 
    No treatment systems that have been used successfully for removing iron and manganese may provide for call removal of arsenic 
    • A. 

      True

    • B. 

      False

  • 12. 
    Most ion exchange are cynical removal plants are fully automated, but must be designed to permit Manual override upon demand 
    • A. 

      True

    • B. 

      False

  • 13. 
    Currently, there are no readily available continuous, online arsenic measuring systems to monitor arsenic removal treatment processes 
    • A. 

      True

    • B. 

      False

  • 14. 
    If a water utilities sources exceeded the arsenic MCL, the water utility to remove arsenic or too bland waters to meet the MCL 
    • A. 

      True

    • B. 

      False

  • 15. 
    What are THM precursors 
    • A. 

      Disinfection byproducts

    • B. 

      Natural organic compounds found after preliminary treatment

    • C. 

      Natural organic compounds found in all surface and ground walkers

    • D. 

      Organic compounds found in drinking water after chlorination

  • 16. 
    On what basis is the maximum contaminant level TTHM's established 
    • A. 

      A feasible level for compliance

    • B. 

      Epidemiological studies

    • C. 

      Results from current research studies

    • D. 

      The health effects data

  • 17. 
    Why do some THM sample bottles contain a small amount of chemical reducing agent (usually sodium thiosulfate or sodium sulfite) 
    • A. 

      To facilitate the chemical reaction that occurs between chlorine and the THM precursors

    • B. 

      To provide the chlorine essential for the formation of THMs

    • C. 

      To provide the Natural organics essential for the formation of THMs

    • D. 

      To stop the chemical reaction that occurs between chlorine in the THM precursors

  • 18. 
    When collecting water sample for THM analysis, why is it good practice to collect two samples at each location 
    • A. 

      To allow the lap to double check test results and it's a bottle breaks and other sample is available for testing

    • B. 

      To compare the rates of THM formation

    • C. 

      To keep the sample storage box properly balanced

    • D. 

      To provide sample collected as an opportunity to compare procedures

  • 19. 
    What is a concern when using the ozone as a disinfectant 
    • A. 

      Ozone creates THM precursors

    • B. 

      Ozone does not leave a residual and the treated water

    • C. 

      Ozone generates disinfection byproducts

    • D. 

      Ozone is relatively inexpensive

  • 20. 
    What term describes those treatment technologies used to remove arsenic that are considered technically and economically feasible
    • A. 

      Best available technology (B.A.T)

    • B. 

      Best management practices (BMP)

    • C. 

      Economically feasible technology (EFT)

    • D. 

      Maximum extent practical(MVP)

  • 21. 
    What is required for blending to be an acceptable arsenic treatment option 
    • A. 

      Appropriate monitoring and testing to ensure acceptable levels of arsenic

    • B. 

      Desirable an acceptable to the consumers

    • C. 

      Proper engineering, operation, and control

    • D. 

      Thorough mixing before entering distribution system

  • 22. 
    What is the operators responsibility regarding a water treatment plants approved operating plan 
    • A. 

      To ensure that the plan is followed at all times

    • B. 

      To modify the plan routinely, as needed, to reflect " real world " conditions

    • C. 

      To prepare and keep up to date appropriate recordkeeping forms

    • D. 

      The train all other operators in the effective use of the plan

  • 23. 
    What is the purpose of the arsenic sampling/monitoring for process control 
    • A. 

      To calculate conformance with the maximum contaminant level

    • B. 

      To troubleshoot one investigate problems

    • C. 

      To verify proper operation of arsenic removal treatment plant

    • D. 

      To verify settings on process controls

  • 24. 
    Which items are example of organic compounds 
    • A. 

      Carbohydrates

    • B. 

      Fats

    • C. 

      Proteins

    • D. 

      Salts

    • E. 

      Vitamins

  • 25. 
    If arsenic treatment residual is deemed hazardous, the cost of treating the hazardous wastes may be prohibitive 
    • A. 

      True

    • B. 

      False

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