Flash Cars Online 1

51 Questions | Total Attempts: 27

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Flash Quizzes & Trivia

Study questions from AWWA Top operator handout.


Questions and Answers
  • 1. 
    Why do larger pump systems usually have a low-pressure cutoff switch on the suction side of the pump?
    • A. 

      To prevent the pump from cavitating

    • B. 

      To prevent the pump from running when no water is available.

    • C. 

      To prevent backflow

  • 2. 
    What does the performance curve of a pump reflect?
    • A. 

      The pump capacity, efficiency, and horsepower.

    • B. 

      The pump rate, efficiency and head

    • C. 

      The pump rate, and system pressure

  • 3. 
    What is lead in drinking water primarily the result of?
    • A. 

      Lead pipes, and solder used in pluming

    • B. 

      Corrosion within the distribution system and residential plumbing

    • C. 

      Natural lead content leaching into the water system

    • D. 

      Improper treatment of water

  • 4. 
    What is the primary source of trihalomethanes (THMs) in drinking water?
    • A. 

      The reaction of chlorine compounds and organic material

    • B. 

      Crop treatment run off into the water supply

    • C. 

      Prescription drugs from waste water disposal.

    • D. 

      Algal bloom

  • 5. 
    What two forms of free available chlorine residual are produced when chlorine is added to pure water?
    • A. 

      Free and total

    • B. 

      Hypochlorous acid (HOCI) and hypochlorite ion (OCI-)

    • C. 

      Hydrocloric acid (HCI) and hypocloric acid (HCO)

  • 6. 
    How can an operator verify the effectiveness of the coagulant chemicals and dosages being applied at the flash mixer? 
    • A. 

      Graduated cylendar settling test and turbidity tests.

    • B. 

      Perform a series of jar tests.

    • C. 

      By monitoring the end product water quality.

    • D. 

      Sludge sample test

  • 7. 
    Microstraining is a treatment process designed to remove what?
  • 8. 
    Under the Clean Water Act, states must identify surface waters that are not "fishable, swimmable," and set what for them?
  • 9. 
    What is the most common injury when handling materials?
  • 10. 
    Concerning floc why is lower turbidity a problem?
  • 11. 
    What is the killing of pathogenic organisms only called
  • 12. 
    Preventive maintenance of pneumatic compounds in pneumatic systems centers around which factor?
  • 13. 
    Describe the function of filter underdrains
  • 14. 
    Name a commonly used coagulant in water.
  • 15. 
    If total coliforms are detected in any sample, the water system must take repeat samples in how many hours?
  • 16. 
    What are the most commonly considered alternative disinfectants to free chlorine?
  • 17. 
    Cryptosporidium oocysts range in size from ?
  • 18. 
    What kind of ions will a water softened with a zeolite remove?
  • 19. 
    True color in water is caused by what?
  • 20. 
    What personal protective equipment (PPE) should an operator use to prevent body contact with acids and bases?
  • 21. 
    Which floride compound comes in solution form?
  • 22. 
    What kind of mixing does proper flocculation require?
  • 23. 
    What can happen if the back pressure on a pump is allowed to drop too low and the pump is operated for a prolonged period of time?
  • 24. 
    One of the most common causes of mud balls in the media is ?
  • 25. 
    What can pumping flow rates considerably higher than design flows cause?
  • 26. 
    Which water quality indicators should be monitored in the normal operation of the sedimentation process?
  • 27. 
    Which process makes water available to the roots of vegitation?
  • 28. 
    For what contaminants are Maximum Contaminant Level Goals (MCLG) established for?
  • 29. 
    What is the chemical name for H2SO4?
  • 30. 
    Where are slow sand filters most useful?
  • 31. 
    Zebra mussels can cause what kind of problems?
  • 32. 
    Bentonite clay is commonly used as?
  • 33. 
    How are bases neutralized?
  • 34. 
    What is hydrostatic pressure testing?
  • 35. 
    Flammable liquids are those that have a flash point below what degree Farenheit?
  • 36. 
    Which disinfection residual causes chlorinous taste or odor problems?
  • 37. 
    How may hydrogen sulfide be eliminated from a water supply?
  • 38. 
    What is the static water level of a well?
  • 39. 
    What are gate valves designed to do?
  • 40. 
    What is the best way to start a disciplinary meeting with an employee?
  • 41. 
    What can happen to gas chlorinators when operated at a high rate of withdrawal from the chlorine cylinder?
  • 42. 
    Where could you find the most accurate representation of an organization's or utility's core values?
  • 43. 
    After initaial full-service operation, grease-lubricated bearings should be regreased at what frequency?
  • 44. 
    What is the purpose of a vacuum regulator-check unit?
  • 45. 
    Why do the results determined by jar tests not always produce the same reactions in an actual plant?
  • 46. 
    What conversion factor is used in calculating CT's for a sedimentation basin with superior baffling characteristics?
  • 47. 
    The use of copper sulfate and other active chemicals used to control aquatic organisms in bodies of water is controlled by the USEPA under what law?
  • 48. 
    What is the primary purpose of filtration?
  • 49. 
    What should an operator do when entering a room containing a high concentration of chlorine gas?
  • 50. 
    Why should algae not be entirely elimated from the source water?
  • 51. 
    What kind of ions will a zeolite softening unit replace calcuim and nagnesium ions with?