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  • Total Questions: 151
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Reference: http://www.api.org/products-and-services/individual-certification-programs/certifications/api571#tab_exam-info

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API-571 Exam Reference

API API-571 Exam Syllabus Topics:

SectionObjectives
Environmentally Assisted Cracking- Stress corrosion cracking
  • 1. Chloride stress corrosion cracking
    • 2. Caustic cracking
      - Hydrogen-related damage
      • 1. Hydrogen embrittlement
        • 2. Hydrogen induced cracking (HIC)
          • 3. Hydrogen blistering
            Refining Process-Specific Damage- FCC and sulfur recovery units
            • 1. High-temperature sulfidic corrosion
              • 2. Erosion-corrosion interactions
                - Hydroprocessing units
                • 1. Hydrogen attack mechanisms
                  • 2. High-pressure hydrogen service degradation
                    Materials Selection and Mitigation- Corrosion control strategies
                    • 1. Coatings and linings
                      • 2. Corrosion inhibitors
                        • 3. Material selection principles
                          General Knowledge of Damage Mechanisms- Overview of degradation in refining environments
                          • 1. Materials performance fundamentals
                            • 2. Damage mechanism classification
                              Corrosion Mechanisms- Aqueous corrosion
                              • 1. Uniform corrosion
                                • 2. Microbiologically influenced corrosion (MIC)
                                  • 3. Pitting corrosion
                                    • 4. Crevice corrosion
                                      • 5. Galvanic corrosion
                                        - High-temperature corrosion
                                        • 1. Sulfidation
                                          • 2. Carburization
                                            • 3. Oxidation
                                              Metallurgical Damage Mechanisms- High-temperature degradation
                                              • 1. Creep damage
                                                • 2. Graphitization
                                                  • 3. Thermal fatigue
                                                    - Embrittlement phenomena
                                                    • 1. Sigma phase embrittlement
                                                      • 2. Temper embrittlement

                                                        API Corrosion and Materials Professional Sample Questions:

                                                        At what minimum level of nickel content does an alloy become nearly immune to chloride stress corrosion cracking?

                                                        • A. 20%
                                                        • B. 45%
                                                        • C. 12%
                                                        • D. 35%
                                                        Reveal Solution  Discussion  0

                                                        Correct Answer: D  🗳️

                                                        Explanation: Only visible for PassLeader members. You can sign-up / login (it's free).

                                                        One way to prevent oxide scale formation on alloy steel is to increase the:

                                                        • A. Chromium content of the steel
                                                        • B. Nickel content of the steel
                                                        • C. Molybdenum content of the steel to 6%
                                                        • D. Carbon equivalent of the alloy
                                                        Reveal Solution  Discussion  0

                                                        Correct Answer: A  🗳️

                                                        Explanation: Only visible for PassLeader members. You can sign-up / login (it's free).

                                                        Convection section soot blowers that have steam supplies without a steam trap can cause:

                                                        • A. carbonic acid corrosion.
                                                        • B. CO2 corrosion.
                                                        • C. thermal fatigue.
                                                        • D. condensate corrosion.
                                                        Reveal Solution  Discussion  0

                                                        Correct Answer: D  🗳️

                                                        Explanation: Only visible for PassLeader members. You can sign-up / login (it's free).

                                                        An NPS 3/4 (DN 20) carbon steel unsupported high-point vent on a steam line has failed by cracking.
                                                        The most likely cause is:

                                                        • A. sulfide stress cracking.
                                                        • B. mechanical fatigue.
                                                        • C. original weld defect.
                                                        • D. thermal overload.
                                                        Reveal Solution  Discussion  0

                                                        Correct Answer: B  🗳️

                                                        Explanation: Only visible for PassLeader members. You can sign-up / login (it's free).

                                                        Which of the following can increase the corrosion rate of carbon steel via hydrofluoric (HF) acid corrosion?

                                                        • A. High nitrogen content in process
                                                        • B. Oxygen contamination
                                                        • C. HF acid concentration above 98%
                                                        • D. Weld hardness above 200 BHN
                                                        Reveal Solution  Discussion  0

                                                        Correct Answer: D  🗳️

                                                        Explanation: Only visible for PassLeader members. You can sign-up / login (it's free).

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