Kansas Water Treatment Class 1 Study Test

35 Questions

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Kansas Water Treatment Class 1 Study Test

Have not taken the test yet but KDHE website recommends studying Cal State Water treatment class materials so I wrote these from 437 page PDF. You're welcome. I ll update after I actually take the test.


Questions and Answers
  • 1. 
    The 2 most important factors impacting the effectiveness of chlorination are
    • A. 

      PH of the water and the content of foreign substances in the water.

    • B. 

      Concentration of chlorine and content of foreign substances in the water

    • C. 

      Concentration of chlorine and contact time

    • D. 

      PH and Temperature of water

  • 2. 
    The treatment process that controls corrosion or scaling is known as
    • A. 

      Chemical control

    • B. 

      Stabilization

    • C. 

      Passivation

    • D. 

      Corrosion kinetics

  • 3. 
    Permanganate reactions are highly dependent on
    • A. 

      Organics in the water

    • B. 

      PH

    • C. 

      Temperature

    • D. 

      Alkalinity

  • 4. 
    It is hardest to kill the organism that causes which of the following illnesses?
    • A. 

      Cholera

    • B. 

      Typhoid

    • C. 

      Cryptosporidiosis

    • D. 

      Infectious hepatitis

  • 5. 
    Disinfection of water wells with free chlorine requires exposure for                     at a concentration of                 .
    • A. 

      6 to 12 hours; 25 mg/L

    • B. 

      12 to 24 hours; 25 mg/L

    • C. 

      12 to 24 hours; 50 mg/L

    • D. 

      12 to 48 hours; 100 mg/L

  • 6. 
    Under no circumstances should a composite sample be collected for which type of analysis?
    • A. 

      Bacteriological

    • B. 

      Total dissolved solids

    • C. 

      Alkalinity

    • D. 

      Turbidity

  • 7. 
    The number of monthly distribution system chlorine residual samples required is
    • A. 

      Based on water withdrawal permit limit.

    • B. 

      Based on system size.

    • C. 

      Based on population.

    • D. 

      Different for each state.

  • 8. 
    Which is (are) the ideal indicator for pathogens?
    • A. 

      Salmonella species

    • B. 

      Coliform group bacteria

    • C. 

      Gram-negative cocci

    • D. 

      Gram-negative coccobacilli

  • 9. 
    When one substance is dissolved in another and will not settle out, which is the product called?
    • A. 

      An emulsion

    • B. 

      A compound

    • C. 

      A suspension

    • D. 

      A solution

  • 10. 
    Acids,bases, and salts lacking carbon are
    • A. 

      Ketones.

    • B. 

      Aldehydes

    • C. 

      Organic compounds

    • D. 

      Inorganic compounds.

  • 11. 
    How many coliform positive samples are allowed each month for water systems that collect less than 40 samples per month?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 12. 
    If a water sample tests positive for coliforms, the system must collect a set of repeat samples within
    • A. 

      18 hours

    • B. 

      24 hours

    • C. 

      36 hours

    • D. 

      48 hours

  • 13. 
    A public water system has at least               service connections or serves              or more persons                or more days each year.
    • A. 

      15 ;50; 50

    • B. 

      25; 25; 50

    • C. 

      15; 25; 60

    • D. 

      25; 50; 60

  • 14. 
    Where are the sampling points located for required sampling of coliform bacteria in a community  water system?
    • A. 

      At consumers' faucets

    • B. 

      75% at locations representative of population distribution and 25% at the farthest point in the system.

    • C. 

      At points where water enters the distribution system

    • D. 

      At representative points within the distribution system.

  • 15. 
    The main purpose  mechanical seals is to
    • A. 

      Keep lubrication in and other foreign materials out.

    • B. 

      Control water leakage from stuffing box

    • C. 

      Prevent water leakage from the pump shaft

    • D. 

      Help prevent shaft from warping

  • 16. 
    Which part of a pump houses the packing or mechanical seal?
    • A. 

      The shroud

    • B. 

      The stuffing box

    • C. 

      The volute

    • D. 

      The casing head

  • 17. 
    Which is the only type of pump that can be operated against a closed valve?
    • A. 

      Vertical turbine pump

    • B. 

      Centrifugal pump

    • C. 

      Axial-flow pump

    • D. 

      Mixed-flow pump

  • 18. 
    Which is a principal problem associated with preliminary treatment screening?
    • A. 

      Broken screens

    • B. 

      Excessive downtime due to numerous shear pins being broken

    • C. 

      Clogging

    • D. 

      Chain comes out of foot sprocket

  • 19. 
    Which adverse effects does the secondary contaminant manganese have?
    • A. 

      Unappealing to drink, undesirable taste, and possible indication of corrosion

    • B. 

      Discolored laundry and changed taste of water, coffee, tea, and other beverages

    • C. 

      Undesirable metallic taste and possible indication of corrosion

    • D. 

      Added total dissolved solids and scale, indication of sewage contamination and tastes.

  • 20. 
    A physical property, as oppose to a chemical property, import to water treatment is
    • A. 

      Turbidity

    • B. 

      PH

    • C. 

      Dissolved Solids

    • D. 

      Electrical conductivity

  • 21. 
    In general, which causes an increase in taste and odors when natural waters lack dissolved oxygen?
    • A. 

      Increase in algae growth

    • B. 

      PH reduction causing an increase in iron and manganese going into solution

    • C. 

      Anaerobic decomposition

    • D. 

      Oxidation of organic material

  • 22. 
    What are two principal chemicals that cause water hardness
    • A. 

      Aluminum and iron

    • B. 

      Aluminum and calcium

    • C. 

      Iron and manganese

    • D. 

      Calcium and magnesium

  • 23. 
    Detention time in flocculation basins are usually designed to provide for
    • A. 

      5 to 15 minutes

    • B. 

      15 to 45 minutes

    • C. 

      45 to 60 minutes

    • D. 

      60 to 90 minutes

  • 24. 
    Alum works best in a pH range of
    • A. 

      Less than 4.0

    • B. 

      4.0 to 5.5

    • C. 

      5.8 to 8.5

    • D. 

      Greater than 9.0

  • 25. 
    Which statement is true concerning colloidal particles?
    • A. 

      Colloidal particles are so small that gravity has little effect on them

    • B. 

      The zeta potential between colloidal particles is balanced by covalent bonding

    • C. 

      Electrical phenomenon of colloidal particles predominate and control their behavior

    • D. 

      The surface area of colloidal particles is very small compared to their mass

  • 26. 
    What natural electron force keeps colloidal particles apart in water treatment?
    • A. 

      Van der Waals forces

    • B. 

      Ionic forces

    • C. 

      Zeta potential

    • D. 

      Quantum forces

  • 27. 
    The zeta potential measures the number of excess                  found on the surface of all particulate matter.
    • A. 

      Electrons

    • B. 

      Ions

    • C. 

      Cations

    • D. 

      Protons

  • 28. 
    Which device collects the settled water as it leaves the sedimentation basin?
    • A. 

      Effluent weir

    • B. 

      Effluent flow box

    • C. 

      Effluent baffle

    • D. 

      Effluent launder

  • 29. 
    In solid-contact basins with fairly constant water quality parameters, how often should the solids concentration be determined?
    • A. 

      At least once per week

    • B. 

      At least every other day?

    • C. 

      At least once per month

    • D. 

      At least twice per day

  • 30. 
    The definition of decant is
    • A. 

      To draw off a liquid layer from a vessel of any size without disturbing and layers above or below

    • B. 

      To draw off the sediment at the bottom of a vessel of any size without disturbing the overlying liquid layers.

    • C. 

      To remove the precipitate at the bottom of any size vessel.

    • D. 

      To draw off the liquid from a vessel of any size without stirring up bottom sediment

  • 31. 
    How often should sedimentation basins with mechanical sludge removal equipment be drained and inspected?
    • A. 

      Twice a year

    • B. 

      Once a year

    • C. 

      Every other year

    • D. 

      Every three years

  • 32. 
    Which is the most important reason to reduce turbidity?
    • A. 

      To reduce taste and odor problems?

    • B. 

      To remove pathogens

    • C. 

      To reduce corrosion

    • D. 

      To determine the efficiency of coagulation and filtration

  • 33. 
    When a filter is ripening.
    • A. 

      It is need of a backwash.

    • B. 

      Turbidity is just starting to break through.

    • C. 

      It is becoming more efficient in particle removal.

    • D. 

      It is beginning to grow algae

  • 34. 
    Which role does the action of straining suspended particles  play during filtration?
    • A. 

      Minor

    • B. 

      Fair

    • C. 

      Good

    • D. 

      Major

  • 35. 
    The turbidity of settled water before it is applied to the filters (post sedimentation process) should always be kept below
    • A. 

      1 - 2 ntu

    • B. 

      2 - 4 ntu

    • C. 

      5 ntu

    • D. 

      8 - 10 ntu