Water Treatment Plant Operation Volume 2 Chapter 17

30 Questions | Total Attempts: 453

SettingsSettingsSettings
Water Treatment Plant Operation Volume 2 Chapter 17 - Quiz

.


Questions and Answers
  • 1. 
    Under the national pollutants discharge lamination system(NPDES) provisions, permits are not required to discharge wastes from a water treatment plant
    • A. 

      True

    • B. 

      False

  • 2. 
     The most important part of an operator job is the end product: good portable water 
    • A. 

      True

    • B. 

      False

  • 3. 
    Not all waters can be treated by using polymers instead of alum  
    • A. 

      True

    • B. 

      False

  • 4. 
    During the draining stages of a sedimentation tank, the walls and all the equipment should be completely hose down and inspected for damage 
    • A. 

      True

    • B. 

      False

  • 5. 
    All gears, sprockets, and moving parts in the sedimentation basin should be lubricated immediately after hosing down to prevent freeze up resulting from exposure to air and and during inspection and repair 
    • A. 

      True

    • B. 

      False

  • 6. 
    Polymer sludges  are not suitable as a soil conditioner 
    • A. 

      True

    • B. 

      False

  • 7. 
     When  removing dried sludge from sand drying beds, the operator must exercise extreme caution so that only the drive sludges picked up with the minimum possible  disturbance to the sand and aggregate 
    • A. 

      True

    • B. 

      False

  • 8. 
     Brine from an ion exchange unit maybe discharged into wastewater collection 
    • A. 

      True

    • B. 

      False

  • 9. 
    Alum sludge has a tendency to call soils to harden; thus, it provides a beneficial 
    • A. 

      True

    • B. 

      False

  • 10. 
     Septic tank pumps used to pump sludge, especially the suction hose, must be thoroughly rinsed and disinfected before using any water treatment plant 
    • A. 

      True

    • B. 

      False

  • 11. 
    What is an operators wants ability with regard to all byproduct and waste from a water treatment plant
    • A. 

      Discharge dirty backwash watering to lakes and rivers

    • B. 

      Disposal into the nearest receiving waters

    • C. 

      Proper disposal and an acceptable and document the matter

    • D. 

      Transport byproduct and waste to storm drains

  • 12. 
     How does water temperature influence the volume of sludge produced
    • A. 

      As temperature increases, the biological activity of the bacteria will increase

    • B. 

      As temperature increases, the flocculation factor of the solids will increase

    • C. 

      As temperature increases, the sedimentation tank bottom attract the solids

    • D. 

      As temperature increases the settling rate of the solids will increase

  • 13. 
     How does increasing the detention time influence the volume of sludge produced
    • A. 

      The amount of solids that settled out will increase

    • B. 

      The biological activity of the bacteria will increase

    • C. 

      The flocculation factor of the solids will increase

    • D. 

      The sedimentation tank bottom attracts the solids

  • 14. 
     The sludge build up any sedimentation tank can interfere with which treatment process
    • A. 

      Coagulation flocculation

    • B. 

      Filtration in disinfection

    • C. 

      Ion exchange and softening

    • D. 

      Screening and sedimentation

  • 15. 
     What is the purpose of backwash recovery ponds or lagoons after the filters have been back washed
    • A. 

      To protect the local groundwater

    • B. 

      To recycle the water through the treatment plant

    • C. 

      To reuse the solids for enhanced coagulation

    • D. 

      To separate the water from the solids

  • 16. 
     What is sludge thickening
    • A. 

      Pretreatment of sludge to facilitate removal of water and subsequent treatment processes

    • B. 

      Treatment by centrifugal or rotational forces to separate solids from liquids

    • C. 

      Treatment that removes or separates a portion of the water present in a sludge or slurry

    • D. 

      Treatment to remove water from the sludge mass to reduce the volume that must be handled

  • 17. 
     What is sludge conditioning
    • A. 

      Pretreatment of sludge to facilitate removal of water and subsequent treatment processes

    • B. 

      Treatment by centrifugal or rotational forces to separate solids from liquids

    • C. 

      Treatment that removes or separates a portion of the water present in a sludge or slurry

    • D. 

      Treatment to remove water from the sludge mass to reduce the volume that must be handled

  • 18. 
     When should the cleaning of sedimentation tanks be done
    • A. 

      Before or after peak demand months

    • B. 

      Before schedule visits by regulatory agencies

    • C. 

      When all of the operators are available to help perform this task

    • D. 

      When receiving waters can’t assimilate the water discharges

  • 19. 
     What should happen of the water table is high when draining an in ground tank
    • A. 

      An empty tank could float like a cork in the water surface and caused considerable damage to the tank and piping

    • B. 

      Extra pumps maybe needed to drain the hole

    • C. 

      Nearby Wells maybe adversely affected by draining the groundwater

    • D. 

      The water could drain into a sewer and overload the wastewater treatment plant

  • 20. 
     How can the efficiency of the Sand drying bed dewatering process be greatly improved
    • A. 

      By enhancing the intensity of solar radiation

    • B. 

      By exposing the process to environmental precipitation

    • C. 

      By preconditioning the process sludge with chemical coagulants

    • D. 

      By protecting the drying bed from windy conditions

  • 21. 
     Regulatory agencies have established programs to enforce rules to prevent any waste discharges that could cause what kind of problems
    • A. 

      Harm to aquatic life

    • B. 

      Harm to plant life

    • C. 

      Harm to the environment

    • D. 

      Receiving water discoloration

    • E. 

      Receiving water pollution

  • 22. 
     Which water quality indicators are subject to waste discharge limitation
    • A. 

      PH

    • B. 

      Total iron and manganese

    • C. 

      Total residual chlorine

    • D. 

      Turbidity

    • E. 

      Visible forms of waste

  • 23. 
     How are sludges the watered at water treatment plants
    • A. 

      Belt presses

    • B. 

      Centrifuges

    • C. 

      Filter presses

    • D. 

      Sand drying beds

    • E. 

      Vacuum filters

  • 24. 
    The amount of sludge accumulated at a water treatment plan depends on which factor
    • A. 

      amount of suspended matter in sourced water

    • B. 

      level of coagulant dosage

    • C. 

      type of coagulant used

    • D. 

      type of consumer served

    • E. 

      type of suspended matter in the source water

  • 25. 
    What are the advantages of using organic polymers instead of alum to reduced ability at a water treatment plant
    • A. 

      Easier to Dewater sludge

    • B. 

      Eliminates sludge hoppers

    • C. 

      Eliminate sludge scrapers

    • D. 

      Reduces the quantity of sludge produced

    • E. 

      Relatively denser sludge

Back to Top Back to top