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Corrosion and Materials Professional

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 251:

    Cl SCC usually occurs at metal temperatures above ________.

    A. 125º F

    B. 175º F

    C. 140º F

    D. 200º F

  • Question 252:

    With creep, increased stress due to loss in thickness from corrosion will ________ time to failure.

    A. Increase

    B. Reduce

    C. Not affect

    D. None of the above

  • Question 253:

    Dissimilar metal welds with a 300 Series stainless steel weld metal on a ferritic steel may also result in narrow region of _________ at the toe of the weld, near the fusion line on the ferritic side.

    A. Ductility

    B. Hardness

    C. Cracking

    D. None of the above

  • Question 254:

    A condition where steel loses strength due to the removal of carbon and carbides leaving only an iron matrix is called decarburization. This occurs during high temperatures, during PWHT and from exposure to fires. Which of the following materials is not affected by this?

    A. Low alloy steel

    B. Duplex SS

    C. Carbon steel

    D. None of the above

  • Question 255:

    ______ 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.

    A. MIC

    B. SOHIC

    C. Sulfuric SCC

    D. None of the above

  • Question 256:

    Amine cracking is a form of ________ stress corrosion cracking.

    A. Hydrogen

    B. Caustic

    C. Polythionic

    D. Alkaline

  • Question 257:

    ___________ is the result of cyclic stresses caused by variations in temperature.

    A. Cyclic cracking

    B. Stress cracking

    C. Stress fatigue

    D. Thermal fatigue

  • Question 258:

    Higher __________ containing alloys are used for improved resistance to naphthenic acid corrosion.

    A. Chromium

    B. Carbon

    C. Molybdenum

    D. All of the above

  • Question 259:

    Which of these materials are susceptible to creep damage?

    A. Carbon steel

    B. Stainless steel

    C. Low alloy steel

    D. All of the above

  • Question 260:

    Ammonium chloride salts may be whitish, greenish or _________.

    A. Reddish

    B. Brownish

    C. Yellowish

    D. Bluish

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