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To obtain the certification, applicants must successfully complete a two-part examination consisting of one closed-book and one open-book test.

– The closed-book test assesses candidates’ everyday working knowledge of API 510 and related documents.

– The open-book test evaluates candidates’ proficiency in more detailed issues, where answers are typically not memorized but can be referenced in relevant documents.

Click below to study our first and second modules for free + try our free quiz.

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🛢️ API 653 Exam tips

  🧮 CORE FORMULAS (MEMORIZE ONLY THESE) 📉 Corrosion Rate (CR) CR =  t initial−t actual/ years in service ➡️ Always subtract initial − actual     ⏳ Remaining Life (RL) RL = t initial−t current / CR    

Top 30 API 653 Calculation Problems with Full Solutions

Here’s your Top 30 API 653 Calculation Problems with Full Solutions—focused on real exam patterns: corrosion, remaining life, thickness, hydrostatic pressure, and decision logic. Use this to build speed + confidence. 🛢️ API 653 — TOP 30 CALCULATION QUESTIONS (WITH

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