Exam Details

  • Exam Code
    :API-571
  • Exam Name
    :Corrosion and Materials Professional
  • Certification
    :API Certifications
  • Vendor
    :API
  • Total Questions
    :454 Q&As
  • Last Updated
    :Jun 28, 2025

API API Certifications API-571 Questions & Answers

  • Question 191:

    Which of the following can be affected by 885º F Embrittlement?

    A. 410 SS

    B. 430 SS

    C. 308 SS

    D. Alloy 2205

    E. A, B and D

  • Question 192:

    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________.

    A. Half-moon

    B. Eyebrow

    C. Radii

    D. None of the above

  • Question 193:

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

    A. PWHT

    B. Non-PWHT

    C. Sensitized

    D. Austenetic

  • Question 194:

    In a pump, the difference between the actual pressure, or head, of a liquid available (measured on the suction side) and the vapor pressure of that liquid is called Net Positive Suction Head (NPSH) available. The minimum head required to

    prevent cavitation with a given liquid at a given flow rate is called Net Positive Suction Head __________.

    Inadequate NPSH can result in cavitation.

    A. Surplus

    B. Required

    C. Reserve

    D. None of the above

  • Question 195:

    Spheroidization and graphitization are competing mechanisms that occur at overlapping temperature ranges. Spheroidization tends to occur preferentially above _______ while graphitization predominates below this temperature.

    A. 1000º F

    B. 1025º F

    C. 1050º F

    D. 1100º F

  • Question 196:

    Carbonate SCC may easily be mistaken for SSC or SOHIC; however, the carbonate cracks are usually ________ the toe of the weld and have multiple parallel cracks.

    A. Further from

    B. Closer to

    C. Diagonal to

    D. Perpendicular to

  • Question 197:

    Hardness levels above ________ are highly susceptible to hydrogen stress cracking (HF).Time-to-failure decreases as the hardness increases.

    A. 225 BHN

    B. 237 BHN

    C. 241 BHN

    D. 247 BHN

  • Question 198:

    Which material below is not susceptible to caustic corrosion?

    A. Carbon steel

    B. 400 Series SS

    C. 300 Series SS

    D. Low alloy steel

  • Question 199:

    The best method to inspect for SCC is ____.

    A. WFMT

    B. UT Shear wave

    C. AET

    D. All of the above

  • Question 200:

    Corrosion by HF (Hydrofluoric) acid can result in high rates of general or localized corrosion and may be accompanied by hydrogen cracking, blistering and ________.

    A. HIC

    B. Delayed cracking

    C. SOHIC

    D. Both A and C

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