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Real API API-510 practice exam questions for easy pass!
Updated: Jul 22, 2026
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API API-510 Exam Overview:
| Certification Vendor: | American Petroleum Institute (API) |
| Exam Name: | API 510 Pressure Vessel Inspector Certification Exam |
| Exam Number: | API-510 |
| Exam Price: | $875 (API member) / $1,125 (non-member) USD |
| Exam Duration: | 450 (total exam day: 7.5 hours; 165 min closed-book + 225 min open-book + 45 min break) |
| Available Languages: | English |
| Related Certifications: | API 570 Piping Inspector API 653 Storage Tank Inspector API 571 Damage Mechanisms API 576 Pressure Relieving Devices |
| Passing Score: | 550 (scaled score, range 200–750) |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 170 (140 scored + 30 unscored pretest; 110 closed-book + 60 open-book) |
| Exam Format: | Computer-based test, Multiple-choice questions, Two-part: closed-book (no references) + open-book (on-screen code access only) |
| Recommended Training: | API 510 Body of Knowledge API Official Training Resources |
| Exam Registration: | API Certification Portal Prometric Scheduling |
| Sample Questions: | API API-510 Sample Questions |
| Exam Way: | In-person computer-based test at Prometric authorized centers worldwide; no remote testing available |
| Pre Condition: | Education + experience: BS/Eng Tech: 1 year; 2-yr degree: 2 years; High school: 3 years; No degree: 5 years. All require minimum 1 year performing/supervising pressure vessel inspection work within last 10 years |
| Official Syllabus URL: | https://www.api.org/certification/icp/programs/510 |
API API-510 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Inspection Scope, Planning, and Data Evaluation | 28% | - Remaining life and corrosion rate calculations - Records review and baseline data collection - TML/CML selection and measurement planning - Code scope, jurisdiction, and regulatory requirements - Inspection interval determination and extension rules - Inspection methods and technique selection |
| Topic 2: Design, Materials, and Fabrication Rules | 22% | - MAWP, thickness, and joint efficiency calculations - Flanges, bolting, gaskets, and special components - Material selection, properties, and toughness requirements - Welding, qualification, and PWHT requirements - Positive material identification (PMI) and traceability - ASME Section VIII, V, IX application |
| Topic 3: Damage Mechanisms and Corrosion Assessment | 22% | - Damage assessment and prioritization - Cracking mechanisms (environmental, fatigue, creep) - High-temperature damage and material degradation - Corrosion under insulation (CUI) and environmental degradation - Internal, external, and localized corrosion |
| Topic 4: Repairs, Alterations, Rerating, and Mechanical Integrity | 16% | - Documentation and post-work verification - Authorization and responsibility for work - Repair vs alteration definitions and procedures - Pressure relieving devices and overpressure protection - Rerating, reclassification, and nameplate updates |
| Topic 5: Fitness-for-Service, RBI, and Pressure Testing | 12% | - Hydrostatic, pneumatic, and leak testing rules - API 579/ASME FFS-1 screening and assessment - Acceptance criteria and post-test evaluation - Risk-based inspection (RBI) principles and application |
API Pressure Vessel Inspector Sample Questions:
1. The surface remote from a welded joint is defined as:
A) 2 inches on either side of the weld
B) 1 inch on either side of the weld or twice the minimum thickness whichever is less
C) 1 inch on either side of the weld or twice the minimum thickness whichever is greater
D) For vessels with inside diameters less than 60 inches 20 inches or ½ the vessel diameter
2. The function of an authorized inspection agency in accordance with API-510, is whose responsibility?
A) Authorized engineering company
B) Authorized repair organization
C) Owner-user
D) Authorized inspection agency
3. Which of the following will vessel rerating involve:
A) Review Inspection records verify the pressure vessel has been in the proposed service previously
B) Calculations from only a manufacturer experienced in pressure vessels
C) Calculations from either the manufacturer or an owner-user engineer experienced in pressure vessels
D) Use of Non-Code requirements as established in accordance with the alternative rules of API 572
4. How does API-510 guide the handling of historical pressure vessels that do not fully comply with current standards?
5. Describe the process for re-certifying a pressure vessel that has been out of service for an extended period according to API-510.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: C | Question # 3 Answer: C | Question # 4 Answer: Only visible for members | Question # 5 Answer: Only visible for members |
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