Free API-571 Exam Braindumps (page: 16)

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The loss in strength from spheroidization (Softening) is usually accompanied by a(n) _________ in ductility, which allows for deformation at stress concentrations.

  1. Increase
  2. Decrease
  3. Reduction
  4. Yield

Answer(s): A



Which of the following materials is not susceptible to high temperature hydrogen attack?

  1. 300 Series SS
  2. 5 Cr-1Mo
  3. 9Cr-1Mo
  4. All of the above

Answer(s): D



Which of these materials are susceptible to creep damage?

  1. Carbon steel
  2. Stainless steel
  3. Low alloy steel
  4. All of the above

Answer(s): D



High temperature hydrogen attack results from exposure to hydrogen at elevated temperatures and pressures. The hydrogen reacts with __________ in steel to produce _________, which cannot diffuse through the steel. The loss of carbides causes an overall loss in strength.

  1. Carbides, oxygen
  2. Alloys, hydrogen dioxide
  3. Carbides, methane
  4. Hydrogen dioxide, H²S

Answer(s): C






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