Free API-571 Exam Braindumps (page: 25)

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Spheroidization and graphitization are competing mechanisms that occur at overlapping temperature ranges. Spheroidization tends to occur preferentially above _______ while graphitization predominates below this temperature.

  1. 1000º F
  2. 1025º F
  3. 1050º F
  4. 1100º F

Answer(s): B



Sulfidation is primarily caused by ________ and other reactive sulfur species as a result of the thermal decomposition of sulfur compounds at high temperatures.

  1. Sulfur dioxide
  2. H²S
  3. Sulfur trioxide
  4. Sulfates

Answer(s): B



Damage from sigma phase appears in the form of ________.

  1. Corrosion
  2. Hardness
  3. Cracking
  4. Ductility

Answer(s): C



The extent and depth of decarburization is a function of temperature and ______.

  1. Pressure
  2. Material properties
  3. Exposure time
  4. Velocity

Answer(s): C






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