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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 241:

    In vessels and piping, creep cracking can occur where high metal temperatures and _________ occur together.

    A. Pressures

    B. Stress concentrations

    C. Velocities

    D. None of the above

  • Question 242:

    Foul smelling water may be a sign of fouling and/or _______

    A. MIC

    B. HIC

    C. SOHIC

    D. All of the above

  • Question 243:

    Naphthenic acid corrosion is most severe in _________ flow; in areas of high velocity or turbulence and in distillation towers where hot vapors condense to form liquid phase droplets.

    A. Single phase

    B. Two phase

    C. Three phase

    D. Negative phase

  • Question 244:

    When caustic stress corrosion cracking is a concern, steam out of _________ carbon steel piping and equipment should be avoided.

    A. PWHT

    B. Non-PWHT

    C. Ferritic

    D. Hardened

  • Question 245:

    Which of these materials are not susceptible to PASCC?

    A. Carbon steel

    B. 300 Series SS

    C. 400 Series SS

    D. Both A and C

  • Question 246:

    The most important factors affecting graphitization are the chemistry, stress, temperature and _______.

    A. Velocity

    B. Time at exposure

    C. Pressure

    D. Ductility

  • Question 247:

    Most brittle failures occur:

    A. Below the impact transition temperature.

    B. On thinner materials.

    C. On "clean" steel.

    D. While in operation at elevated temperatures.

  • Question 248:

    Lean amine is generally not corrosive because they have either low conductivity and/or high pH. Corrosion rates increase with increasing temperatures, particularly in rich amine service. Temperatures above _________ can result in acid gas flashing and severe localized corrosion.

    A. 170º F

    B. 190º F

    C. 220º F

    D. 240º F

  • Question 249:

    Atmospheric corrosion is of greatest concern in:

    A. Dry climates in rural locations.

    B. Dry climates in industrial locations.

    C. Wet climates in rural locations.

    D. Wet climates in industrial locations.

  • Question 250:

    Carburization can be confirmed by substantial increases in _______ and loss of __________.

    A. Hardness

    B. Tensile Strength

    C. Ductility

    D. A and B

    E. A and C

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