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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 231:

    Which of the following materials is susceptible to carburization?

    A. Low alloy steels

    B. 300 Series SS

    C. 400 Series SS

    D. All of the above

  • Question 232:

    ________ of a component is the most important factor in determining a components resistance to mechanical fatigue.

    A. Design

    B. Temperature

    C. Stress

    D. Pressure

  • Question 233:

    Exposure to high solution strength caustic can result in general corrosion or high corrosion rates above ________.

    A. 175º F

    B. 150º F

    C. 125º F

    D. 100º F

  • Question 234:

    Cadmium and lead will cause LME on _____________.

    A. Copper alloys

    B. 300 Series SS

    C. Aluminum alloys

    D. High strength steel

  • Question 235:

    The sudden rapid fracture under stress (residual or applied) where the material exhibits little or no evidence of ductility or plastic deformation is called _________.

    A. 885º F Embrittlement

    B. Temper Embrittlement

    C. Stress Corrosion Cracking

    D. Brittle Fracture

  • Question 236:

    Alloy 400 is susceptible to LME when it comes in contact with molten ________.

    A. Cadmium

    B. Mercury

    C. Zinc

    D. Lead

  • Question 237:

    Where is PASCC normally located?

    A. Adjacent to welds

    B. On impellers

    C. At stress risers

    D. At flanges

  • Question 238:

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

    A. Increasing, decreasing

    B. Decreasing, increasing

    C. Increasing, increasing

    D. Decreasing, decreasing

  • Question 239:

    The severity of hydrochloric acid corrosion ________ with _________ HCl concentration and increasing temperatures.

    A. Decreases, decreasing

    B. Increases, increasing

    C. Decreases, increasing

    D. Increases, decreasing

  • Question 240:

    With short term overheating, time to failure will ___________ as internal pressures or loading decrease.

    A. Increase

    B. Decrease

    C. Remain the same

    D. None of the above

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