Exam Name: Pressure Vessel Inspector
Certification Provider: API
Corresponding Certification: Individual Certification Programs
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Instant Download API : API-510
Check Updated on: Oct 15, 2026
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- Total Questions: 175
- Updated on: Oct 15, 2026
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- Total Questions: 175
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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 |
| Available Languages: | English |
| Real Exam Qty: | 170 (140 scored + 30 unscored pretest; 110 closed-book + 60 open-book) |
| Exam Format: | Two-part: closed-book (no references) + open-book (on-screen code access only), Multiple-choice questions, Computer-based test |
| Exam Duration: | 450 (total exam day: 7.5 hours; 165 min closed-book + 225 min open-book + 45 min break) |
| Exam Price: | $875 (API member) / $1,125 (non-member) USD |
| Certificate Validity Period: | 3 years |
| Related Certifications: | API 571 Damage Mechanisms API 576 Pressure Relieving Devices API 653 Storage Tank Inspector API 570 Piping Inspector |
| Passing Score: | 550 (scaled score, range 200–750) |
| Recommended Training: | API 510 Body of Knowledge API Official Training Resources |
| Exam Registration: | API Certification Portal Prometric Scheduling |
| Sample Questions: | DOWNLOAD DEMO |
| 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 |
|---|---|---|
| Design, Materials, and Fabrication Rules | 22% | - Welding, qualification, and PWHT requirements - Material selection, properties, and toughness requirements - MAWP, thickness, and joint efficiency calculations - ASME Section VIII, V, IX application - Flanges, bolting, gaskets, and special components - Positive material identification (PMI) and traceability |
| Repairs, Alterations, Rerating, and Mechanical Integrity | 16% | - Rerating, reclassification, and nameplate updates - Pressure relieving devices and overpressure protection - Repair vs alteration definitions and procedures - Authorization and responsibility for work - Documentation and post-work verification |
| Inspection Scope, Planning, and Data Evaluation | 28% | - Inspection methods and technique selection - TML/CML selection and measurement planning - Code scope, jurisdiction, and regulatory requirements - Remaining life and corrosion rate calculations - Records review and baseline data collection - Inspection interval determination and extension rules |
| Damage Mechanisms and Corrosion Assessment | 22% | - Corrosion under insulation (CUI) and environmental degradation - Damage assessment and prioritization - Cracking mechanisms (environmental, fatigue, creep) - Internal, external, and localized corrosion - High-temperature damage and material degradation |
| Fitness-for-Service, RBI, and Pressure Testing | 12% | - API 579/ASME FFS-1 screening and assessment - Hydrostatic, pneumatic, and leak testing rules - Acceptance criteria and post-test evaluation - Risk-based inspection (RBI) principles and application |
API-510 Study Material: Answers
The API Pressure Vessel Inspector exam requires a score of 550 (scaled score, range 200–750) to pass, and the official registration fee is $875 (API member) / $1,125 (non-member) USD. Knowing these numbers in advance keeps your planning honest.
Each round of the API-510 question bank starts from the official exam objectives: experts map the syllabus, draft questions to cover it with precision, and review the result before release. When new exam points appear, the bank is updated accordingly — deliberate coverage, not guesswork.
Any details you leave with us during browsing or purchase are guarded against misuse and external threats, and they are used only to deliver your order and support. Your API-510 purchase stays between you and us — that is a standing commitment, not a marketing line.
The API Pressure Vessel Inspector exam contains 170 (140 scored + 30 unscored pretest; 110 closed-book + 60 open-book) questions, and you will have 450 (total exam day: 7.5 hours; 165 min closed-book + 225 min open-book + 45 min break) minutes to complete them. Practicing under the same constraints makes exam-day pacing feel rehearsed.
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
You can confirm the current eligibility requirements on the official API-510 exam page before you register.
Many candidates combine practice questions with official training. Recommended options include:
This package includes 175 practice questions for the API Pressure Vessel Inspector exam. Every answer is verified by an experienced team of experts, so you can trust what you study.
You can register for the API Pressure Vessel Inspector exam through the official channels:
The API Pressure Vessel Inspector practice questions are organized around the official exam objectives. Key topics include:
- Repairs, Alterations, Rerating, and Mechanical Integrity (16%)
- Inspection Scope, Planning, and Data Evaluation (28%)
- Damage Mechanisms and Corrosion Assessment (22%)
Syllabus-driven coverage means no wasted practice on irrelevant material.
API Pressure Vessel Inspector Sample Questions:
Discuss how API-510 standards can be adapted to accommodate advancements in material science used in pressure vessel construction.
Reveal Solution Discussion 0Correct Answer:
API-510 standards can be adapted to accommodate advancements in material science by incorporating new research and technologies into the codes and guidelines regularly. This adaptation involves collaborating with material scientists and industry experts to evaluate the performance and safety implications of new materials. When a new material offers proven benefits such as enhanced durability or corrosion resistance, API-510 standards are updated to include guidelines for its use, testing requirements, and best practices for inspection. This ensures that the standards remain relevant and provide the necessary guidance to safely incorporate innovative materials into pressure vessel construction.
According to API-510, the acceptance criteria for a welded repair must be in accordance with which of the following?
- A. Any internationally recognized welding standard
- B. The original code of construction
- C. The latest edition of the ASME code
- D. The discretion of the inspecting engineer
Correct Answer: B 🗳️
When must both an internal and external inspection always be performed?
- A. at installation of vessel
- B. whenever the vessel's ownership changes
- C. whenever there is a change in fluid service
- D. whenever the vessel's ownership and location changes
Correct Answer: D 🗳️
Who is responsible to ensure that the Authorized Inspection Agency functions in accordance with the requirements of API 510?
- A. Pressure vessel engineer
- B. Owner/user
- C. Jurisdiction
- D. AI
Correct Answer: B 🗳️
Explain how API-510 assists in determining the repair or replacement decisions for damaged pressure vessels.
Reveal Solution Discussion 0Correct Answer:
API-510 assists in making repair or replacement decisions for damaged pressure vessels by providing criteria for assessing the extent of damage and its impact on the vessel's safety and functionality. The standard includes guidelines for conducting thorough inspections to understand the damage fully and for evaluating the feasibility and safety of various repair methods. If repairs can restore the vessel to a condition that is safe and compliant with API-510, then repairs are recommended.
However, if the damage is too extensive or if repairing the vessel is not cost-effective or feasible, replacement is advised.
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