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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 171:

    Naphthenic acid is _____ by catalytic reactions in downstream hydro processing and FCC units.

    A. Enhanced

    B. Destroyed

    C. Concentrated

    D. Diluted

  • Question 172:

    Regular and controlled carbon grades of stainless steels such as types 304/304H and 316/316H are particularly susceptible to sensitization in the weld HAZ. Low carbon "L" grades are less susceptible and usually can be welded without sensitizing. The "L" grades will not sensitize provided long term operating temperatures do not exceed about __________.

    A. 700º F

    B. 750º F

    C. 800º F

    D. 900º F

  • Question 173:

    Amine cracking is ________ likely to occur in lean MEA and DEA services than in MDEA and DIPA services.

    A. More

    B. Less

    C. As

    D. None of the above

  • Question 174:

    _________ significantly increases the probability and severity of blistering, HIC and SOHIC.

    A. Hydrogen

    B. Oxygen

    C. Cyanide

    D. Caustic

  • Question 175:

    Which of the methods are effective for finding thermal fatigue cracks?

    A. MT

    B. PT

    C. VT

    D. All of the above

  • Question 176:

    Which of the following is not a primary factor contributing to erosion?

    A. Impact angle (angle that impacting particles strike metal)

    B. Size of impacting particles

    C. Velocity of impacting particles

    D. Density of impacting particles

    E. Corrosiveness of the environment

  • Question 177:

    Which of the following is not a primary factor contributing to erosion-corrosion?

    A. Impact angle (angle that impacting particles strike metal)

    B. Tensile strength of the metal

    C. Velocity of impacting particles

    D. Corrosiveness of the environment

  • Question 178:

    There is currently no known metal alloy that is immune to _________ under all conditions.

    A. Carburization

    B. Metal dusting

    C. Decarburization

    D. None of the above

  • Question 179:

    Cracking of a metal due to stress relaxation during PWHT or in service at elevated temperatures is called ______. It is most often found in heavy wall sections.

    A. Thermal cracking

    B. Reheat cracking

    C. Step-like cracking

    D. None of the above

  • Question 180:

    Which of the following are affected by sulfidation?

    A. Carbon steel

    B. 300 Series SS

    C. 400 Series SS

    D. All of the above

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