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Updated: Sep 25, 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 |
| Related Certifications: | API 653 API 570 API 580 API 577 |
| Exam Format: | Multiple-choice questions, Computer-based testing at authorized centers, Open-book section (code/standards), Closed-book section |
| Exam Duration: | 480 minutes |
| Real Exam Qty: | Approximately 150 (varies) |
| Exam Price: | Varies by region and provider (typically ~USD 350–600) |
| Certificate Validity Period: | 3 years (renewable with recertification requirements) |
| Passing Score: | 70% (scaled) |
| Available Languages: | English |
| Exam Registration: | API Certification Program Registration |
| Sample Questions: | API API-510 Sample Questions |
| Exam Way: | Computer-based exam at authorized testing centers (proctored exam delivery). |
| Pre Condition: | Requires relevant industry experience in pressure vessel inspection, design, repair, or maintenance as defined by API certification eligibility criteria. |
| Official Syllabus URL: | https://www.api.org/products-and-services/certifications/inspection-and-mechanical/api-510 |
API API-510 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Repair, Alteration, and Rerating | - Alteration and rerating requirements
|
| Pressure Vessel Design and Engineering Fundamentals | - Design principles and calculations
|
| Risk and Integrity Management | - Risk-based inspection (RBI)
|
| Inspection, Testing, and Monitoring | - Corrosion monitoring and assessment
|
| Codes, Standards, and Fitness-for-Service | - Fitness-for-service evaluation
|
API Pressure Vessel Inspector Sample Questions:
Outline the process and requirements for the decommissioning and safe disposal of pressure vessels according to API-510.
Reveal Solution Discussion 0Correct Answer:
Decommissioning a pressure vessel under API-510 involves a thorough cleaning to remove hazardous substances, a final inspection to document the vessel's condition, and ensuring all environmental regulations are met during disposal. The vessel may need to be dismantled in a controlled manner, especially if it contained toxic or radioactive substances. Documentation of the decommissioning process is crucial for compliance and environmental protection.
Describe the training requirements for new inspectors under API-510.
Reveal Solution Discussion 0Correct Answer:
New inspectors under API-510 are required to undergo comprehensive training that covers all aspects of pressure vessel inspection, including theoretical knowledge of materials science and the practical application of inspection techniques. The training must include a detailed study of the API-510 code, hands-on experience with non-destructive testing methods, and familiarity with documentation and compliance procedures. Additionally, inspectors must pass a certification exam and participate in continuing education to maintain their certification and stay updated with industry developments.
The API authorized pressure vessel inspector may give prior authorization for repairs that do not involve:
- A. Pneumatic testing
- B. Radiography
- C. Final visual inspections
- D. Pressure tests
Correct Answer: D 🗳️
In API-510, which is not considered a standard practice for extending the life of a pressure vessel?
- A. Increasing the operating temperature to reduce viscosity
- B. Application of a corrosion inhibitor
- C. Regular cleaning and maintenance
- D. Periodic recoating of internal surfaces
Correct Answer: A 🗳️
What does API-510 require to verify a welder's qualifications when welding on a pressure vessel?
- A. A practical demonstration
- B. Performance qualification records
- C. Inspection of previous work
- D. A written test
Correct Answer: B 🗳️
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