API API-571 Exam
Corrosion and Materials Professional (Page 7 )

Updated On: 7-Feb-2026

_________ is a change in the microstructure of certain carbon steels and 0.5Mo steels after long- term operation in the 800º F to 1100º F range that may cause a loss in strength, ductility and/or creep resistance.

  1. Embrittlement
  2. Carburization
  3. Graphitization
  4. Sensitization

Answer(s): C



__________ is usually found in aqueous environments or services where water is sometimes or always present, especially where stagnant or low-flow conditions allow the growth of microorganisms.

  1. MIC
  2. HIC
  3. SOHIC
  4. None of the above

Answer(s): A



With chloride stress corrosion cracking, __________ temperatures ________ the susceptibility for cracking.

  1. Decreasing, Increases
  2. Increasing, Increases
  3. Increasing, Decreases
  4. Decreasing, Eliminates

Answer(s): B



__________ is a form of cracking that results when certain molten metals come in contact with specific alloys. Cracking can be very sudden and brittle in nature.

  1. SCC
  2. LME
  3. AET
  4. SOHIC

Answer(s): B



Amine cracking has been reported down to ambient temperatures with some amines. __________ temperatures and stress levels _______ the likelihood and severity of cracking.

  1. Increasing increases
  2. Increasing, decreases
  3. Decreasing increases
  4. Increasing, reduces

Answer(s): A



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