Exam Name: Corrosion and Materials Professional
Certification Provider: API
Corresponding Certification: ICP Programs
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API-571 Online Test Engine
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- Total Questions: 151
- Updated on: Nov 09, 2026
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- Total Questions: 151
- Updated on: Nov 09, 2026
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API-571 PDF Practice Q&A's
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- Total Questions: 151
- Updated on: Nov 09, 2026
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API API-571 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Environmentally Assisted Cracking | 25% | - Caustic Stress Corrosion Cracking - Chloride Stress Corrosion Cracking - Hydrogen Embrittlement - Sulfide Stress Cracking |
| Topic 2: Uniform or Localized Loss of Thickness | 25% | - Hydrochloric Acid Corrosion - Oxidation and Scaling - Ammonium Bisulfide Corrosion - Corrosion Under Insulation (CUI) - Sulfidation |
| Topic 3: Other Damage Mechanisms | 15% | - Cavitation Damage - Liquid Metal Embrittlement - Erosion and Erosion-Corrosion - Microbiologically Influenced Corrosion |
| Topic 4: Mechanical and Metallurgical Failure Mechanisms | 15% | - Creep and Stress Rupture - Thermal Fatigue - Mechanical Fatigue - Brittle Fracture |
| Topic 5: High-Temperature Corrosion and Degradation | 15% | - Decarburization - Carburization - Metal Dusting - Graphitization |
| Topic 6: Terms, Definitions, and Acronyms | 5% |
API-571 Exam FAQ — Design, Delivery, Dedication
The API-571 exam is a API certification exam validating the API Corrosion and Materials Professional syllabus shown above. It belongs to these credential paths: API 510 Pressure Vessel Inspector, API 570 Piping Inspector, API 653 Aboveground Storage Tank Inspector. Candidates in 2026 start with ActualTestsIT's 151 practice questions, available as a printable PDF, a Windows Desktop Test Engine, and an Online Test Engine — three versions of the same materials.
The official API Corrosion and Materials Professional outline defines 6 domains. The leading three are Environmentally Assisted Cracking (25%), Terms, Definitions, and Acronyms (5%), and Uniform or Localized Loss of Thickness (25%). The full list is in the topics section above, and ActualTestsIT's 151 practice questions cover each one.
Hold current API 510, 570 or 653 certification; or meet education + experience requirements: BS/BS in engineering/tech + 1 year, 2-year degree + 2 years, high school + 3 years industry experience (past 10 years) Since requirements change over time, confirm the latest on the official API exam page before scheduling.
Three versions of the same study materials: a printable, expert-prepared PDF with free demo download and instant access; a Desktop Test Engine for Windows with customizable simulation and timed modes that works offline; and an Online Test Engine for any browser on Windows, Mac, Android, and iOS with test history and performance review. All 151 practice questions are identical across versions. Every purchase includes 365 days of free updates, a 50% renewal discount afterward, and unlimited computer installations.
The API Corrosion and Materials Professional exam requires 70% / Scaled score determined by API to pass, and registration costs $440 USD. A failed attempt means paying the same fee again — a readiness check with the ActualTestsIT engines before booking is the cheaper option.
API recommends these training resources for the API Corrosion and Materials Professional exam:
Follow the training with steady self-testing — the 151 practice questions from ActualTestsIT help you apply theory and fill any gaps the training leaves.
The API Corrosion and Materials Professional exam contains 110 (100 scored, 10 unscored pretest) to complete within 195 minutes. Timed simulation in the ActualTestsIT Desktop Test Engine teaches that rhythm before exam day does.
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Computer-based testing (CBT) at Prometric test centers; online proctored option available Register for the API Corrosion and Materials Professional exam through these official channels:
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API Corrosion and Materials Professional Sample Questions:
In a naphthenic acid corrosive (NAC) environment, what is the effect of sulfur?
- A. Sulfide cracking
- B. No effect
- C. Corrosion accelerator
- D. Inhibition
Correct Answer: D 🗳️
Explanation: Only visible for ActualTestsIT members. You can sign-up / login (it's free).
Naphthenic acid corrosion (NAC) is most severe in what phase of flow?
- A. Two phase
- B. Vapor phase
- C. Water phase
- D. Hydrocarbon phase
Correct Answer: A 🗳️
Explanation: Only visible for ActualTestsIT members. You can sign-up / login (it's free).
(Graphitization occurs in:)
- A. Carbon steel
- B. Stainless steel
- C. Monel
- D. Aluminum
Correct Answer: A 🗳️
Explanation: Only visible for ActualTestsIT members. You can sign-up / login (it's free).
Which of the following will be most effective in finding sour water corrosion?
- A. Profile radiographic testing
- B. Spot ultrasonic testing
- C. Angle beam ultrasonic testing
- D. Guided wave ultrasonic testing
Correct Answer: A 🗳️
Explanation: Only visible for ActualTestsIT members. You can sign-up / login (it's free).
Boiler water condensate corrosion is caused primarily by:
- A. Dissolved iron oxides
- B. High pH from water treatment problems
- C. Carbon dioxide and oxygen
- D. Sodium sulfites or hydrazines
Correct Answer: C 🗳️
Explanation: Only visible for ActualTestsIT members. You can sign-up / login (it's free).
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