Try and practice the latest API : API-510 real questions & answers
Updated: Jul 30, 2026
No. of Questions: 175 Questions & Answers with Testing Engine
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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 Format: | Computer-based test, Multiple-choice questions, Two-part: closed-book (no references) + open-book (on-screen code access only) |
| Exam Duration: | 450 (total exam day: 7.5 hours; 165 min closed-book + 225 min open-book + 45 min break) |
| Real Exam Qty: | 170 (140 scored + 30 unscored pretest; 110 closed-book + 60 open-book) |
| 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) |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Exam Price: | $875 (API member) / $1,125 (non-member) USD |
| 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 |
|---|---|---|
| Damage Mechanisms and Corrosion Assessment | 22% | - High-temperature damage and material degradation - Cracking mechanisms (environmental, fatigue, creep) - Corrosion under insulation (CUI) and environmental degradation - Damage assessment and prioritization - Internal, external, and localized corrosion |
| Fitness-for-Service, RBI, and Pressure Testing | 12% | - Risk-based inspection (RBI) principles and application - API 579/ASME FFS-1 screening and assessment - Hydrostatic, pneumatic, and leak testing rules - Acceptance criteria and post-test evaluation |
| Repairs, Alterations, Rerating, and Mechanical Integrity | 16% | - Repair vs alteration definitions and procedures - Rerating, reclassification, and nameplate updates - Authorization and responsibility for work - Pressure relieving devices and overpressure protection - Documentation and post-work verification |
| Design, Materials, and Fabrication Rules | 22% | - Material selection, properties, and toughness requirements - Welding, qualification, and PWHT requirements - Positive material identification (PMI) and traceability - ASME Section VIII, V, IX application - MAWP, thickness, and joint efficiency calculations - Flanges, bolting, gaskets, and special components |
| Inspection Scope, Planning, and Data Evaluation | 28% | - Remaining life and corrosion rate calculations - Records review and baseline data collection - Code scope, jurisdiction, and regulatory requirements - Inspection interval determination and extension rules - TML/CML selection and measurement planning - Inspection methods and technique selection |
API Pressure Vessel Inspector Sample Questions:
1. Inspection for corrosion under insulation (CUI) shall be considered for externally insulated vessels subject to moisture ingress and that operate between which of the following temperature range?
A) 10°F and 350°F for carbon and low alloy steels
B) 175°F and 350°F for austenitic stainless steels
C) 275°F and 450°F for austenitic stainless steels
D) 20°F and 350°F for carbon and low alloy steels
2. Explain the role of digital documentation in maintaining API-510 compliance for pressure vessels.
3. Explain the process and benefits of integrating API-510 inspection standards with ISO 9001 quality management systems.
4. During vessel repairs or alterations, who is required to maintain the welding records?
A) repair organization owner/user
B) authorized inspector
C) pressure vessel engineer
D) welding inspector
5. Discuss how API-510 addresses the issue of high-temperature hydrogen attack (HTHA) in pressure vessels.
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: Only visible for members | Question # 3 Answer: Only visible for members | Question # 4 Answer: A | Question # 5 Answer: Only visible for members |
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