API 571 FOR API 510/570(THERMAL FATIGUE)

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Author:
egf4201
ID:
299869
Filename:
API 571 FOR API 510/570(THERMAL FATIGUE)
Updated:
2015-11-19 11:16:40
Tags:
API 571 510 570 THERMAL FATIGUE
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API 571 FOR API 510/570(THERMAL FATIGUE)
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API 571 FOR API 510/570(THERMAL FATIGUE)
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  1. Thermal Fatigue is caused by
    cyclic stresses that come from temperature variations
  2. Time to failure by Thermal Fatigue is primarily affected by:
    magnitude of stress and number of cycles
  3. Thermal Fatigue becomes of concern if temperature swings exceed:
    200 deg F
  4. Which of the following is not a primary initiating point for Thermal Fatigue?
    A) Notches
    B) Nozzle-to-shell welds
    C) Toe of the weld
    D) Rounded pits
    D) Rounded pits
    (this multiple choice question has been scrambled)
  5. Which of the following is not a primary candidate for Thermal Fatigue?
    A) Coke drums
    B) Welds joining materials having different coefficients of expasion
    C) Mix points of hot and cold streams
    D) 600 psig steam piping
    E) Steam actuated soot blowers
    D) 600 psig steam piping
    (this multiple choice question has been scrambled)
  6. Thermal Fatigue cracks usually:
    initiate on the surface of the component
  7. Many Thermal Fatigue cracks are filled with:
    oxides
  8. Thermal Fatigue cracks:
    propagate transverse to the stress
  9. Which of the following is not a way to prevent Thermal Fatigue?
    A) Join materials with differential rates of thermal expansion
    B) Make smooth transitions
    C) Blend grinding weld caps
    D) Control rates of heating and cooling 
    A) Join materials with differential rates of thermal expansion
    (this multiple choice question has been scrambled)

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