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  1. Home
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  3. API-571

API API-571 Exam (page: 8)
API Corrosion and Materials Professional
Updated on: 09-Feb-2026

Viewing Page 8 of 92
API-571 PDF 454 Questions

Amine stress corrosion cracking is a term applied to the cracking of steels under the combined actions of ________ and __________ in aqueous alkanolamine systems used to remove/absorb H²S and/or CO² and their mixtures from various gas and liquid hydrocarbon streams.

  1. Temperature, pressure
  2. Pressure, stress
  3. Temperature, corrosion
  4. Tensile stress, corrosion

Answer(s): D



______ is similar to HIC but is a potentially more damaging form of cracking which appears as arrays of cracks stacked on top of each other. The result is a through thickness crack that is perpendicular to the surface and is driven by high levels of stress.

  1. MIC
  2. SOHIC
  3. Sulfuric SCC
  4. None of the above

Answer(s): B



Weld heat affected zone graphitization is most frequently found in the heataffected zone adjacent to welds in a narrow band, corresponding to the low temperature edge of the heat affected zone, In multi-pass welded butt joints, these zones overlap each other covering the entire cross section.

Because of its appearance, this type of graphitization is called________.

  1. Half-moon
  2. Eyebrow
  3. Radii
  4. None of the above

Answer(s): B



At a given pressure, the H²S concentration in the sour water _________ as temperature _________.

  1. Increases, increases
  2. Decreases, decreases
  3. Increases, decreases
  4. Decreases, increases

Answer(s): D



In order for PASCC to occur the material must be ______.

  1. PWHT
  2. Non-PWHT
  3. Sensitized
  4. Austenetic

Answer(s): C



Viewing Page 8 of 92



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