API API-571 Exam Exercise | API-571 Study Test

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API API-571 Exam Syllabus Topics:

SectionObjectives
Topic 1: Metallurgical Damage Mechanisms- Embrittlement phenomena
  • 1. Sigma phase embrittlement
    • 2. Temper embrittlement
      - High-temperature degradation
      • 1. Graphitization
        • 2. Creep damage
          • 3. Thermal fatigue
            Topic 2: General Knowledge of Damage Mechanisms- Overview of degradation in refining environments
            • 1. Damage mechanism classification
              • 2. Materials performance fundamentals
                Topic 3: Corrosion Mechanisms- Aqueous corrosion
                • 1. Uniform corrosion
                  • 2. Pitting corrosion
                    • 3. Crevice corrosion
                      • 4. Microbiologically influenced corrosion (MIC)
                        • 5. Galvanic corrosion
                          - High-temperature corrosion
                          • 1. Carburization
                            • 2. Oxidation
                              • 3. Sulfidation
                                Topic 4: Materials Selection and Mitigation- Corrosion control strategies
                                • 1. Corrosion inhibitors
                                  • 2. Material selection principles
                                    • 3. Coatings and linings
                                      Topic 5: Refining Process-Specific Damage- Hydroprocessing units
                                      • 1. Hydrogen attack mechanisms
                                        • 2. High-pressure hydrogen service degradation
                                          - FCC and sulfur recovery units
                                          • 1. Erosion-corrosion interactions
                                            • 2. High-temperature sulfidic corrosion
                                              Topic 6: 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

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                                                        API Corrosion and Materials Professional Sample Questions (Q61-Q66):

                                                        NEW QUESTION # 61
                                                        At high temperatures, metal components can slowly and continuously deform under load below the yield stress. This time dependent deformation of stressed components is known as __________.

                                                        Answer: B


                                                        NEW QUESTION # 62
                                                        Amine stress corrosion cracking is most often associated with lean amine services. The pure alkanolamine does not cause cracking. Cracking in rich amine services are most often associated with _______ problems.

                                                        Answer: C


                                                        NEW QUESTION # 63
                                                        Vibration-induced fatigue can be eliminated or reduced through _________ and the use of supports and vibration dampening equipment. Material upgrades are not usually a solution.

                                                        Answer: D


                                                        NEW QUESTION # 64
                                                        The likelihood of brittle fracture is best lessened by:

                                                        Answer: A

                                                        Explanation:
                                                        From API RP 571, brittle fracture prevention measures include:
                                                        "Postweld Heat Treatment (PWHT) reduces residual stresses in the heat affected zone and base metal, thus lowering susceptibility to brittle fracture."
                                                        "PWHT is particularly effective when applied to pressure-containing components fabricated from carbon steel or low-alloy steel that will experience low-temperature service." (Reference: API RP 571, Section 4.2.1.2 - Brittle Fracture) Therefore, while other measures may reduce stress or detect flaws, PWHT directly targets one of the root causes: residual stress. Thus, option D is the best prevention method.


                                                        NEW QUESTION # 65
                                                        Ferritic stainless steels are usually not used in __________ applications.

                                                        Answer: A


                                                        NEW QUESTION # 66
                                                        ......

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