Exam API API-571 Tutorial - Vce API-571 Free

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API API-571 Exam Syllabus Topics:

SectionObjectives
Topic 1: Damage Mechanisms- General / Mechanical
  • 1. Fretting / Fretting Corrosion
  • 2. Corrosion Under Insulation (CUI)
  • 3. Cavitation
  • 4. Hydrogen Embrittlement
  • 5. Graphitization
  • 6. Fatigue
  • 7. Galvanic Corrosion
  • 8. Temper Embrittlement
  • 9. Sigma Phase Embrittlement
  • 10. Erosion/Erosion-Corrosion
  • 11. 885°F (475°C) Embrittlement
  • 12. Softening (Spheroidization)
  • 13. Mechanical Fatigue
  • 14. Metal Dusting
  • 15. Liquid Metal Embrittlement (LME)
  • 16. Stress Relief Cracking
  • 17. Thermal Fatigue
  • 18. Vibration-Induced Fatigue
  • 19. Dissimilar Metal Weld (DMW) Cracking
  • 20. Zinc Embrittlement
  • 21. Atmospheric Corrosion
  • 22. Creep / Stress Rupture
  • 23. Brittle Fracture
  • 24. Strain Aging
- Environment-Assisted Cracking
  • 1. Ammonia Stress Corrosion Cracking
  • 2. Chloride Stress Corrosion Cracking (Cl-SCC)
  • 3. Stress-Oriented Hydrogen-Induced Cracking (SOHIC)
  • 4. Hydrogen Embrittlement
  • 5. Hydrogen-Induced Cracking (HIC) / Stepwise Cracking
  • 6. Polythionic Acid Stress Corrosion Cracking (PTA-SCC)
  • 7. Ethanol Stress Corrosion Cracking (SCC)
  • 8. Carbonate Stress Corrosion Cracking
  • 9. Amine Stress Corrosion Cracking
  • 10. Sulfide Stress Cracking (SSC) / Hydrogen Stress Cracking
  • 11. Caustic Stress Corrosion Cracking
- High Temperature Corrosion (800°F / 425°C and above)
  • 1. Metal Dusting
  • 2. Fuel Ash Corrosion
  • 3. Sulfidation
  • 4. Carburization
  • 5. Oxidation
  • 6. Nitriding
- High-Temperature Hydrogen Attack (HTHA)
  • 1. Decarburization
  • 2. Internal Hydrogen Attack (IHA)
- Uniform or Localized Loss of Thickness
  • 1. Boiler Water / Condensate Corrosion
  • 2. Corrosion Under Insulation (CUI)
  • 3. Dealloying (Selective Leaching)
  • 4. Microbiologically Influenced Corrosion (MIC)
  • 5. Galvanic Corrosion
  • 6. Flow-Accelerated Corrosion (FAC) / Flow-Assisted Corrosion
  • 7. Caustic Corrosion
  • 8. Cooling Water Corrosion
  • 9. CO2 Corrosion
  • 10. Flue Gas Dew Point Corrosion
  • 11. Soil Corrosion
  • 12. Atmospheric Corrosion

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API Corrosion and Materials Professional Sample Questions (Q44-Q49):

NEW QUESTION # 44
(Graphitization occurs in:)

Answer: B

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
According to API RP 571, graphitization is a high-temperature degradation mechanism that occurs in carbon and carbon-molybdenum steels exposed for long periods at temperatures typically above 800 °F (425 °C).
In this process:
* Iron carbides decompose into free graphite nodules
* The steel loses strength, ductility, and pressure-retaining capability
* Failures can occur without significant wall loss
Graphitization does not occur in aluminum, stainless steels, or nickel-copper alloys such as Monel.
Referenced Documents (Study Basis):
* API RP 571 - Section on Graphitization


NEW QUESTION # 45
The creep threshold temperature for 1 ¼, 2 ¼, 5 and 9 Cr is ________.

Answer: A


NEW QUESTION # 46
Erosion and erosion-corrosion metal loss is characterized by:

Answer: D

Explanation:
Erosion and erosion-corrosion are mechanical degradation mechanisms enhanced by fluid motion, and typically result in directional or flow-oriented metal loss patterns.
According to API RP 571 Section 5.4.2 (Erosion and Erosion/Corrosion):
"Erosion typically results in localized thinning, often described as grooves, gullies, or horseshoe-shaped patterns... The metal loss is directional and may occur in elbows, tees, reducers, and pumps." Hence, Option C (grooves and gullies) most accurately describes erosion and erosion-corrosion characteristics.


NEW QUESTION # 47
Which of the following alkanolamine systems is the least aggressive in causing amine corrosion?

Answer: D


NEW QUESTION # 48
Microbiologically induced corrosion is largely independent of the:

Answer: C

Explanation:
From API RP 571 on Microbiologically Influenced Corrosion (MIC):
"MIC depends on the presence of water, nutrients, and specific microbial species such as SRB (sulfate- reducing bacteria)."
"While flow velocity may influence deposition and oxygen content, MIC can occur in both stagnant and flowing systems. Hence, it's not strongly dependent on velocity." Thus, option D is correct - MIC is largely independent of flow velocity.


NEW QUESTION # 49
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