Boiler Operator 3rd-test 3-4 Blue Book

25 Questions | Total Attempts: 2177

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Boiler Quizzes & Trivia

Boiler operators are responsible for maintaining heating systems in large buildings in the boiler, engine, and mechanical rooms. The Boiler Operator 3rd-test below covers 3-4 blue book is designed to help you understand your class work more and prepare you for the upcoming exam. Give it a shot!


Questions and Answers
  • 1. 
    A flame rod ____.
    • A. 

      Regulates steam flow

    • B. 

      Ignites the fuel oil

    • C. 

      Ensures that the gas pilot is lighted

    • D. 

      Measures heat in the boiler

  • 2. 
    There are approximately ____ Btu in 1 cu ft of natural gas.
    • A. 

      100

    • B. 

      1000

    • C. 

      3000

    • D. 

      5000

  • 3. 
    The ph of boiler water may be controlled by using ____.
    • A. 

      Sulphite

    • B. 

      Sulphate

    • C. 

      Caustic soda

    • D. 

      Softened feedwater

  • 4. 
    Boiler water with a ph of 11 is ____.
    • A. 

      Alkaline

    • B. 

      Acidic

    • C. 

      Neutral

    • D. 

      Hard

  • 5. 
    A scotch marine boiler is easily identified because it ____.
    • A. 

      Has a brick setting

    • B. 

      Has a cylindrical internal furnace

    • C. 

      Is externally fired

    • D. 

      Has waterwalls

  • 6. 
    The air flow switch at the burner fan housing ____.
    • A. 

      Ensures the primary air fan is functioning

    • B. 

      Controls the secondary air damper

    • C. 

      Controls the boiler operating range

    • D. 

      Controls the boiler water temperature

  • 7. 
    The ASME code recommends that low water fuel cutoffs be tested by an evaporation test ____.
    • A. 

      Daily

    • B. 

      Weekly

    • C. 

      Monthly

    • D. 

      Yearly

  • 8. 
    A neutral solution is ____ on the ph scale.
    • A. 

      0

    • B. 

      3.5

    • C. 

      7

    • D. 

      14

  • 9. 
    A dry pipe separator ____.
    • A. 

      Delivers higher quality steam to the header

    • B. 

      Distributes feedwater the length of the drum

    • C. 

      Prevents water hammer

    • D. 

      Agitates the water in the steam and water drum

  • 10. 
    Draft is carefully controlled to ____.
    • A. 

      Maintain at least 15% CO in gases of combustion

    • B. 

      Completely burn fuel supplied to the burner

    • C. 

      Prevent the boiler from overheating

    • D. 

      Maintain high levels of excess air in gases of combustion

  • 11. 
    Draft is measured with a ____.
    • A. 

      Pyrometer

    • B. 

      Hydrometer

    • C. 

      Manometer

    • D. 

      Potentiometer

  • 12. 
    A ringleman test is used to determine ____.
    • A. 

      CO2 in gases of combustion

    • B. 

      Smoke density

    • C. 

      Flame failure

    • D. 

      Steam quality

  • 13. 
    A flame scanner proves (verifies) ____.
    • A. 

      Beta rays

    • B. 

      Heat

    • C. 

      Pilot and main flame

    • D. 

      X rays

  • 14. 
    According to the ASME code, when warming up a boiler the air cock is closed when ____.
    • A. 

      Steam starts to come out of the boiler

    • B. 

      The steam pressure gauge reads 25 psi

    • C. 

      The steam pressure gauge reads 35 psi

    • D. 

      The boiler goes on-line

  • 15. 
    A motor rated at 25 HP delivering 20 HP  is operating at ____ % capacity.
    • A. 

      75

    • B. 

      80

    • C. 

      85

    • D. 

      90

  • 16. 
    A deposit of scale or mud in an HRT boiler could cause ____.
    • A. 

      A bag to develop

    • B. 

      A draft loss

    • C. 

      Overheating of the breeching

    • D. 

      Lowering of the chimney temperature

  • 17. 
    Waterwall tubes protect the refractory and ____.
    • A. 

      Increase boiler heating surface

    • B. 

      Act as stays for tube sheets

    • C. 

      Allow the operator to blow down while steaming

    • D. 

      Help control water circulation

  • 18. 
    Steam at 250 psia and 400*F is considered ____.
    • A. 

      Supersaturated

    • B. 

      Saturated

    • C. 

      Superheated

    • D. 

      Steam temperature cannot exceed 212*F

  • 19. 
    Sensible heat is heat that ____.
    • A. 

      Changes a substance's state but not its temperature

    • B. 

      Changes a substances's temperature and its state

    • C. 

      Changes a substance's temperature but not its state

    • D. 

      Is 970.3 Btu/lb of steam

  • 20. 
    Extra heavy pipe must be used on blowdown lines when the steam pressure exceeds ____ psi.
    • A. 

      15

    • B. 

      100

    • C. 

      125

    • D. 

      200

  • 21. 
    To check the water level on a boiler on-line, it is best to ____.
    • A. 

      Give the boiler a bottom blowdown

    • B. 

      Blow down the gauge glass

    • C. 

      Lower the steam pressure

    • D. 

      Check the log sheet

  • 22. 
    A steam pressure gauge has a siphon between the boiler and the pressure gauge to ____.
    • A. 

      Allow for expansion and contraction

    • B. 

      Prevent water from entering the pressure gauge

    • C. 

      Protect the pressure gauge from high steam pressure

    • D. 

      Prevent steam from entering the pressure gauge

  • 23. 
    If a boilere evaporates 50,000 lb of steam/hr and is evaporating 10 lb of steam/sq ft of heating surface, the heating surface of the boiler is ____ sq ft.
    • A. 

      50

    • B. 

      500

    • C. 

      5,000

    • D. 

      50,000

  • 24. 
    Oxygen in feedwater causes ____.
    • A. 

      Priming

    • B. 

      Foaming

    • C. 

      Pitting

    • D. 

      Scale

  • 25. 
    It is permissible to have one blowdown valve on a boiler operated under ____ psi.
    • A. 

      100

    • B. 

      125

    • C. 

      150

    • D. 

      200

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