API-571

API-571 practice questions, page 6 of 18, with answer review and explanations.

Question 26

_________ 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

Question 27

__________ 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

Question 28

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

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

Question 29

__________ 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

Question 30

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