API 571 : Boiler Water Condensate Corrosion

10 Questions | Total Attempts: 62

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Boiler Quizzes & Trivia

Questions are part of API 570 exam study guide


Questions and Answers
  • 1. 
    Corrosion protection in the boiler is accomplished by laying down and continuously maintaining a layer of _____.
    • A. 

      Manganese

    • B. 

      Magnetite

    • C. 

      Carbon monoxide

    • D. 

      Carbonate

  • 2. 
    Corrosion in boiler feedwater and condensate return systems is usually the result of dissolved gases, oxygen and ________.
    • A. 

      Carbon monoxide

    • B. 

      Carbon dioxide

    • C. 

      Material properties

    • D. 

      H²S

  • 3. 
    BOILER WATER CONDENSATION CORROSION is the result of dissolved gases, oxygen and carbon dioxide
    • A. 

      True

    • B. 

      False

  • 4. 
    Which of the following is not a major factor associated with boiler water condensate corrosion?
    • A. 

      Operating pressure

    • B. 

      Oxygen content

    • C. 

      Carbon dioxide content

    • D. 

      Process ph

    • E. 

      Temperatur e

  • 5. 
    What method is most used to assure boiler feed water corrosion is not occurring?
    • A. 

      Spot UT readings at turbulent areas

    • B. 

      Profile RT at turbulent areas

    • C. 

      Profile RT at stagnant areas

    • D. 

      Laboratory analysis of boiler feedwater

  • 6. 
    What treatment is used to prevent boiler feed water corrosion?
    • A. 

      Oxide scavengers are added to process

    • B. 

      Oxygen scavengers are added to proces son 2

    • C. 

      Sulfide scavengers are added to process

    • D. 

      Sulfur scavengers are added to process

  • 7. 
    Corrosion from oxygen in boiler feed water usually creates:
    • A. 

      Uniform corrosion.

    • B. 

      Isolated pitting.

    • C. 

      Intergranular cra cking.

    • D. 

      Transgranular cracking .

    • E. 

      Hard and brittle zones.

  • 8. 
    Protection in a boiler from boiler feed water corrosion is accomplished by:
    • A. 

      Injecting chlorines to kill microbiological bugs.

    • B. 

      Injecting caustic to lower the ph to < 4.0.

    • C. 

      Lowering solids content in boiler feed wa ter to less than 50 ppm.

    • D. 

      Maintaining a protective corrosion layer of magnetite (Fe3O4).

  • 9. 
    CO2 corrosion tends to be a smooth grooving of the pipe wall in Boiler Water Condensate Corrosion
    • A. 

      True

    • B. 

      False

  • 10. 
    Which one is a related mechanism of Boiler Water Condensate Corrosion?
    • A. 

      CO2 Corrosion

    • B. 

      Corrosion Fatigue

    • C. 

      Erosion/erosion-corrosion

    • D. 

      All of the above

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