Kansas Water Treatment 1

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Kansas Water Treatment Operator 1 Certification practice test. Based on KDHE study guide

  
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  • 1. 
    When Collecting a distribution system sample for bacteriological testing, the person collecting the sample should allow the water to run ____ before filling the sample bottle.
    • A. 

      As long as necessary to permit clearing of the service line

    • B. 

      1 hr

    • C. 

      30 min

    • D. 

      Only a few seconds


  • 2. 
    The Volume of a Cylinder with a radius of 5ft and a height of 8 ft is ___ cubic FT
    • A. 

      157

    • B. 

      328

    • C. 

      451

    • D. 

      628


  • 3. 
    The volume of a 100FT diameter tank that is 12ft deep is ____ Cubic FT
    • A. 

      94,200

    • B. 

      98,600

    • C. 

      103,300

    • D. 

      285,200


  • 4. 
    A chemical commonly used to raise PH is
    • A. 

      Alum

    • B. 

      Calgon

    • C. 

      Chlorine

    • D. 

      Lime


  • 5. 
    Black stains on plumbing fixtures might be attributed to
    • A. 

      Calcium

    • B. 

      Copper

    • C. 

      Magnesium

    • D. 

      Manganese


  • 6. 
    One Kilogram equals ____ grams
    • A. 

      10

    • B. 

      100

    • C. 

      1000

    • D. 

      10,000


  • 7. 
    The indicator organisms used to determine contamination of drinking water are
    • A. 

      Coliform group

    • B. 

      Giardia lamblia

    • C. 

      Iron bacteria

    • D. 

      Salmonella


  • 8. 
    The packing around the shaft of a centrifugal pump should be
    • A. 

      In good condition

    • B. 

      Kept as tight as possible

    • C. 

      Replaced once a month

    • D. 

      Tightened just enough to allow an occasional drop of liquid to escape


  • 9. 
    The chemical symbol for iron is
    • A. 

      Al

    • B. 

      Ca

    • C. 

      Fe

    • D. 

      Ir


  • 10. 
    One pound per square inch of pressure will raise water ____ Feet
    • A. 

      2.31

    • B. 

      10.5

    • C. 

      62.5

    • D. 

      1728


  • 11. 
    Static head is defined as the
    • A. 

      Energy of motion of the water

    • B. 

      Pressure due to depth or elevation of the water

    • C. 

      Pressure loss in the line due to friction

    • D. 

      All the above


  • 12. 
    What is the volume of a settling tank 100ft long, 25ft wide, and 8ft deep?
    • A. 

      16,000 cubic feet

    • B. 

      20,000 cubic feet

    • C. 

      25,000 cubic feet

    • D. 

      36,200 cubic feet


  • 13. 
    What is used to detect chlorine leaks ?
    • A. 

      10 percent solution of aluminum sulfate

    • B. 

      10 percent solution of ammonia hydroxide

    • C. 

      10 percent solution of calcium hydroxide

    • D. 

      10 percent solution of sodium hydroxide


  • 14. 
    The pressure gauge reading at the base of a tank filled to a depth of 1 ft is ___ PSI
    • A. 

      144

    • B. 

      62.4

    • C. 

      0.433

    • D. 

      0.231


  • 15. 
    The multiple tube fermentation test consists of three distinct tests. These tests, in the order performed, are the
    • A. 

      Preliminary, confirmed, and completed tests

    • B. 

      Preliminary, presumptive and confirmed tests

    • C. 

      Presumptive, confirmed and completed tests

    • D. 

      Presumptive, preliminary, and completed tests


  • 16. 
    Chlorine gas is
    • A. 

      The same weight by volume as air.

    • B. 

      Lighter than air.

    • C. 

      Lighter than air only when under pressure.

    • D. 

      Denser than air.


  • 17. 
    Polyphosphates may be used in water treatment to retard corrosion and
    • A. 

      Adjust pH

    • B. 

      Calcium scale

    • C. 

      Reduce chlorine demand

    • D. 

      Reduce taste and odor.


  • 18. 
    Calcium hypochlorite is formulated as a
    • A. 

      Coagulant

    • B. 

      Gas

    • C. 

      Liquid

    • D. 

      Powder


  • 19. 
    Chlorine leaks in metal container tend to
    • A. 

      Become larger

    • B. 

      Become smaller

    • C. 

      Remain the same size

    • D. 

      Seal themselves


  • 20. 
    Determining the pH of water is one of the important test of water quality. The results of the pH test indicate the
    • A. 

      Chlorine residual

    • B. 

      Hydrogen ion activity

    • C. 

      Presence of coliform organisms

    • D. 

      Presence of iron


  • 21. 
    Leakage from a packing gland should be approximately
    • A. 

      None

    • B. 

      One drop per second

    • C. 

      One drop per minute

    • D. 

      30 drops per hour


  • 22. 
    A chlorine cylinder valve is thought to be leaking. If ammonia vapor is passed near the valve, the presence of a leak would be indicated by
    • A. 

      A loud noise

    • B. 

      A red vapor

    • C. 

      A rotten egg odor

    • D. 

      White smoke


  • 23. 
    If a fire hydrant requires a nozzle pressure of 100 PSI, what head of water must be used to supply it?
    • A. 

      231 ft

    • B. 

      63.3 ft

    • C. 

      32.1 ft

    • D. 

      21 ft


  • 24. 
    A water main should be disinfected
    • A. 

      When the pipe is in the storage yard

    • B. 

      After the pipe is delivered to the job site

    • C. 

      After the pipe is laid in place

    • D. 

      At the manufacturer's plant.


  • 25. 
    Carbon dioxide in water will
    • A. 

      Decrease turbidity

    • B. 

      Increase turbidity

    • C. 

      Lower pH

    • D. 

      Increase pH


  • 26. 
    A pneumatic ejector lifts water from low points to higher levels. The device used to achieve this is a(n)
    • A. 

      Air compressor

    • B. 

      Axial flow pump

    • C. 

      Centrifugal pump

    • D. 

      Plunger-type pump


  • 27. 
    Pressure is commonly measured in
    • A. 

      British thermal units

    • B. 

      Million gallons per day

    • C. 

      Milligrams per liter

    • D. 

      Pounds per square inch

    • E. 


  • 28. 
    Mechanical seals are being installed in pumps because
    • A. 

      Packing requires an undesirable leakage that seals eliminate

    • B. 

      Seals prevent cross connections with potable water

    • C. 

      Seals will take more shaft misalignment than packing

    • D. 

      There is a shortage of good packing available on the market.


  • 29. 
    Which one of the following items must be replaced when connecting a new chlorine cylinder?
    • A. 

      Air and water regulator

    • B. 

      Fiber washer

    • C. 

      Needle valve and seat

    • D. 

      Pressure regulator


  • 30. 
    A major cause of pump and motor shaft coupling wear is a
    • A. 

      Discharge pressure too high

    • B. 

      Low suction pressure

    • C. 

      Misalignment between pumps and motor flanges.

    • D. 

      Worn-out seal.


  • 31. 
    Filters in a water treatment process are primarily for removing or reducing
    • A. 

      Calcium and magnesium

    • B. 

      Color

    • C. 

      Tastes and odors

    • D. 

      Turbidity


  • 32. 
    A water treatment plant receives an average flow of 261 gpm. What is the daily total flow at the plant?
    • A. 

      .32 mgd

    • B. 

      .38 mgd

    • C. 

      .48 mgd

    • D. 

      1.4 mgd


  • 33. 
    The free chlorine residual in water is the amount of
    • A. 

      Chlorine applied as measured in milligrams per liter

    • B. 

      Chlorine in raw water as it comes from the stream, reservoir, or well

    • C. 

      Chlorides in water

    • D. 

      Uncombined chlorine that remains in the water after the chlorine has been applied and allowed to react.


  • 34. 
    The chemical name for muriatic acid is
    • A. 

      Sulfuric acid

    • B. 

      Phosphoric acid

    • C. 

      Hydrochloric acid

    • D. 

      Carbonic acid


  • 35. 
    A chlorine residual in water can be determined by using the reagent
    • A. 

      Diethyl-p-phjenylenediamne (DPD)

    • B. 

      Ehtylenediaminetetraacetic acid (EDTA)

    • C. 

      Polychlorinated byphenols (PCB)

    • D. 

      Sodium thiosulfate (Na2S2O3)


  • 36. 
    The most important use of chlorine in water treatment is as a(n)
    • A. 

      Aid to coagulation

    • B. 

      Algicide

    • C. 

      Disinfectant

    • D. 

      Oxidant for iron and manganese


  • 37. 
    What is the approximate volume in gallons occupied by 15,000 cubic feet of water?
    • A. 

      22,100 gallons

    • B. 

      112,200 gallons

    • C. 

      120,000 gallons

    • D. 

      210,000 gallons


  • 38. 
    The difference between the amount of chlorine added to water and the amount of residual chlorine remaining at the end of a specified contact period is
    • A. 

      The dosage

    • B. 

      Free available chlorine

    • C. 

      Chlorine residual

    • D. 

      Chlorine demand.


  • 39. 
    Water that requires a large amount of soap to produce an acceptable lather is termed
    • A. 

      Corrosive

    • B. 

      Hard

    • C. 

      Soft

    • D. 

      Turbid


  • 40. 
    A pump may be damaged if it is started with the discharge valve closed, it the pump is a(n)
    • A. 

      Turbine pump

    • B. 

      Positive-displacement pump

    • C. 

      Centrifugal pump

    • D. 

      Axial-flow pump


  • 41. 
    Prepared water sample bottles used for collecting samples for bacteriological examination contain sodium thiosulfate crystals. It is important not to rinse out the sample bottle because the sodium thiosulfate
    • A. 

      Eliminates the need for refrigerating the sample

    • B. 

      Holds the pH at a constant value

    • C. 

      Kills any pathogens that may be present in the sample

    • D. 

      Neutralizes any chlorine present in the sample


  • 42. 
    Velocity of flow in water mains is usually expressed in terms of
    • A. 

      Feet per second

    • B. 

      Gallons per minute

    • C. 

      Liters per foot

    • D. 

      Milligrams per litre


  • 43. 
    A pH reading of 6.0 in raw water indicates the sample is
    • A. 

      Acid

    • B. 

      Alkaline

    • C. 

      Basic

    • D. 

      Neutral


  • 44. 
    The tempurature of water in a stream is 10 degrees Celsius. What is the equivalent temperature in degrees Fahrenheit?
    • A. 

      82 F

    • B. 

      56 F

    • C. 

      50 F

    • D. 

      42 F


  • 45. 
    A grab sample represents
    • A. 

      The quality of water at the time the sample was taken.

    • B. 

      Approximately 2 L of water

    • C. 

      A time-proportional sample

    • D. 

      A flow-proportional sample


  • 46. 
    The pH scale runs from
    • A. 

      0 - 14

    • B. 

      0 - 7

    • C. 

      7 - 14

    • D. 

      1 - 15


  • 47. 
    Five gallons of water weigh ______ LB
    • A. 

      8.34

    • B. 

      37.5

    • C. 

      41.7

    • D. 

      83.4


  • 48. 
    What is the approximate weight, in pounds, of 50,000 gal of water?
    • A. 

      41,000 lb.

    • B. 

      71,000 lb.

    • C. 

      170,000 lb

    • D. 

      417,000 lb


  • 49. 
    The flow is 35,000 gpd. this is _____MGD.
    • A. 

      .35

    • B. 

      .035

    • C. 

      .0035

    • D. 

      .00035


  • 50. 
    The most important factor affecting the useful life of piping is
    • A. 

      The ability of the material used to resist internal and external corrosion

    • B. 

      The depth of the pipe

    • C. 

      The flexibility of the pipe

    • D. 

      The smoothness of the pipe.


  • 51. 
    The pH value of 7.0 is considered to be
    • A. 

      Acidic

    • B. 

      Alkaline

    • C. 

      Basic

    • D. 

      Neutral


  • 52. 
    The discharge pressure gauge on a pump reads 15 psi. This is equivalent to ___ ft of head
    • A. 

      5

    • B. 

      10

    • C. 

      25

    • D. 

      35


  • 53. 
    Chlorine is very corrosive when combined with
    • A. 

      Alum

    • B. 

      Carbon

    • C. 

      Fluoride

    • D. 

      Moisture


  • 54. 
    What is the surface area of a clarifier 40ft in diameter?
    • A. 

      422 sq ft

    • B. 

      630 sq ft

    • C. 

      1120 sq ft

    • D. 

      1256 sq ft

    • E. 


  • 55. 
    Chloramines are formed by the addition of chlorine and
    • A. 

      Ammonia

    • B. 

      Liquid nitrogen

    • C. 

      Soda ash

    • D. 

      Sodium fluoride


  • 56. 
    The purpose of a rotameter is to
    • A. 

      Create a vacuum

    • B. 

      Maintain a smooth fluid flow

    • C. 

      Meter the flow of the fluid

    • D. 

      Reduce pressure


  • 57. 
    A valve that joins a customers service to the water main is called the
    • A. 

      Bypass valve

    • B. 

      Control flume

    • C. 

      Corporation cock

    • D. 

      Pressure-regulating valve


  • 58. 
    When compared to a 1-mil gal reservoir at the same water elevation, how much pressure in the mains will a a 100,000-gal reservoir develop?
    • A. 

      Exactly one tenth as much pressure.

    • B. 

      Less pressure

    • C. 

      More pressure

    • D. 

      The same pressure.


  • 59. 
    What information must be on a warning tag attached to a switch that has been locked out?
    • A. 

      Directions for removing tag

    • B. 

      Name of nearest physician to call in case of an emergency

    • C. 

      Signature of person who locked out switch and who is the only person authorized to remove the tag.

    • D. 

      Time to unlock switch


  • 60. 
    Which one of the following types of meters has no moving parts?
    • A. 

      Propellor

    • B. 

      Proportional

    • C. 

      Rotameter

    • D. 

      Venturi


  • 61. 
    The component of a centrifugal pump that is sometimes installed on the end of the suction pipe to hold the priming is known as a
    • A. 

      Casing

    • B. 

      Drain

    • C. 

      Foot valve

    • D. 

      Ventilator


  • 62. 
    Coagulation and sedimentation alone cannot remove all the trubidity and suspended matter in raw water. The final step in the removal of suspended matter in water is
    • A. 

      Chlorination

    • B. 

      Filtration

    • C. 

      Flocculation

    • D. 

      Sterilization


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