API 571 Practice Test

The API 571 Practice Test is a free advanced-level, 25-minute skill test from Science of Apps. Practice for the API 571 Corrosion and Materials Professional certification — mechanical and metallurgical failure mechanisms, uniform and localised metal loss, high-temperature corrosion, environment-assisted cracking, and refining-specific damage mechanisms — written to API RP 571 (Damage Mechanisms Affecting Fixed Equipment in the Refining Industry) and related API practices such as RP 941 for 2026. Independent practice; not affiliated with API. Score 70% or more on its 25 questions to earn a verifiable API 571 Readiness certificate (SOA-APIZ). Every question is based on published standards and research — including API RP 571: Damage Mechanisms Affecting Fixed Equipment in the Refining Industry (American Petroleum Institute) — and each answer is explained with its source.

Yes. Science of Apps has a free API 571 Practice Test built on the current American Petroleum Institute (API) exam outline for 2026 and 2027. It covers mechanical and metallurgical failure mechanisms, uniform and localised loss of thickness, high-temperature corrosion, environment-assisted cracking and refining-specific mechanisms, scores you instantly and issues a verifiable certificate.

Read the five skill areas on this page, then take the 25-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a API 571 Readiness certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: API RP 571: Damage Mechanisms Affecting Fixed Equipment in the Refining Industry (American Petroleum Institute). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Five skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Mechanical and Metallurgical Failure Mechanisms (Embrittlement, Creep and Fatigue); Uniform and Localised Loss of Thickness (Corrosion types, Erosion and MIC); High-Temperature Corrosion (Sulfidation, Oxidation and Carburisation); Environment-Assisted Cracking (SCC, Wet H2S and Hydrogen); Refining-Specific Mechanisms (HTHA, Sour water and Acids). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Corrosion or materials engineer, Inspection engineer, Mechanical integrity specialist, Pressure equipment inspector and Refinery process or reliability engineer. It suits anyone who wants a quick, verifiable way to show API 571 knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

API RP 571 describes damage mechanisms that affect fixed equipment in refineries and petrochemical plants, including their causes, affected materials, critical factors, appearance, prevention and inspection. The API 571 certification tests a professional's knowledge of these mechanisms.

Knowing which mechanisms are likely in a given material, process and temperature lets engineers choose the right inspection method, location and interval. API 571 feeds directly into risk-based inspection (API 580/581) and integrity operating windows.

No. It is an independent practice test written to the publicly available API 571 content outline for 2026 and 2027, for checking your readiness before you book the real exam. Passing earns a Science of Apps certificate rather than the official credential.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

25 questions — 5 from each of 5 skill areas — with a 25-minute limit. You need 70% (18 of 25) to pass and 90% for distinction.

We rate it Advanced: assumes years in the role or deep specialist knowledge. It has 25 scenario questions — 5 from each of 5 skill areas — and a 25-minute limit. You need 70% (18 of 25) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.