API API-571 Exam
Corrosion and Materials Professional (Page 14 )

Updated On: 9-Feb-2026

Ferritic stainless steels are usually not used in __________ applications.

  1. Non-pressure boundary
  2. Pressure boundary
  3. High temperature
  4. Low temperature

Answer(s): B



Stress ruptures are characterized by _________ failures and are usually accompanied by thinning at the fracture surface.

  1. Rapid
  2. Fish-mouth
  3. Tensile
  4. None of the above

Answer(s): B



With hydrofluoric acid corrosion, corrosion rates increase with _______ temperatures and ______ HF concentrations.

  1. Increasing, decreasing
  2. Decreasing, increasing
  3. Increasing, increasing
  4. Decreasing, decreasing

Answer(s): A



Which of the following materials is susceptible to CO² corrosion?

  1. Carbon steel
  2. Stainless steel
  3. Duplex stainless steel
  4. Both B and C

Answer(s): A



Steel hardness, __________ and stress are critical factors in causing hydrogen stress cracking.

  1. Temperature
  2. Alloy composition
  3. Strength
  4. None of the above

Answer(s): C






Post your Comments and Discuss API API-571 exam prep with other Community members:

Join the API-571 Discussion