Exam Name: Pressure Vessel Inspector
Certification Provider: API
Corresponding Certification: Individual Certification Programs
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Updated: Oct 11, 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 |
| Related Certifications: | API 580 API 570 API 653 API 577 |
| Real Exam Qty: | Approximately 150 (varies) |
| Exam Format: | Open-book section (code/standards), Multiple-choice questions, Closed-book section, Computer-based testing at authorized centers |
| Exam Duration: | 480 minutes |
| Available Languages: | English |
| Certificate Validity Period: | 3 years (renewable with recertification requirements) |
| Exam Price: | Varies by region and provider (typically ~USD 350–600) |
| Passing Score: | 70% (scaled) |
| Exam Registration: | API Certification Program Registration |
| Sample Questions: | DOWNLOAD DEMO |
| 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 |
|---|---|
| Topic 1: Codes, Standards, and Fitness-for-Service | - API and ASME standards
|
| Topic 2: Repair, Alteration, and Rerating | - Repair procedures
|
| Topic 3: Inspection, Testing, and Monitoring | - Corrosion monitoring and assessment
|
| Topic 4: Pressure Vessel Design and Engineering Fundamentals | - Design principles and calculations
|
| Topic 5: Risk and Integrity Management | - Risk-based inspection (RBI)
|
API API-510 Exam Questions Answered
The API-510 exam leads to the API 510 Pressure Vessel Inspector Certification certification from American Petroleum Institute (API). It is positioned at the Professional level. The exam validates the knowledge and skills expected of candidates preparing for API Pressure Vessel Inspector.
Related certifications include:
- API 570
- API 653
- API 577
- API 580
The API-510 exam includes Approximately 150 (varies) questions and allows 480 minutes. Before test day, divide the available time by the number of questions in a timed practice set to establish a steady per-question pace. If a difficult item starts consuming too much time, mark it for review and move forward instead of losing momentum. A full timed practice session can help you decide when to move on, when to return, and how much buffer to reserve for a final check.
The passing score for API-510 is 70% (scaled), and the official exam fee is Varies by region and provider (typically ~USD 350–600). Because a retake requires paying the exam fee again, use timed practice results as a readiness check before scheduling your next attempt. If your performance remains inconsistent, continue reviewing weak domains and repeat a timed session before booking the exam.
Requires relevant industry experience in pressure vessel inspection, design, repair, or maintenance as defined by API certification eligibility criteria.
Eligibility rules can change, so confirm the current requirements on the official exam page before registering.
You can register through the official channels listed below:
The available exam delivery method is Computer-based exam at authorized testing centers (proctored exam delivery)..
The official training options include:
After reviewing the recommended training, reinforce what you learned with ActualTestsIT's 175 practice questions for API-510.
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The current API-510 outline is organized into 5 top-level domains. The first listed areas include:
- Repair, Alteration, and Rerating
- Risk and Integrity Management
- Codes, Standards, and Fitness-for-Service
Review the Exam Topics section above for the complete outline and any nested subtopics.
API Pressure Vessel Inspector Sample Questions:
Which document is referenced by API-510 for the guidelines on pressure relieving systems?
- A. API 653
- B. API 650
- C. API 520
- D. API 579
Correct Answer: C 🗳️
Who is responsible to ensure that the Authorized Inspection Agency functions in accordance with the requirements of API 510?
- A. Pressure vessel engineer
- B. Jurisdiction
- C. AI
- D. Owner/user
Correct Answer: D 🗳️
After an alteration to a pressure vessel, in lieu of a hydrostatic test, special inspection procedures will be carried out.
What must be done prior to carrying out the special inspection procedures?
- A. Consult with the chief inspector of the jurisdiction
- B. Check with the NBIC Authorized inspector
- C. Make certain it is permitted by any jurisdictional rules that may exist and consult with an engineer experienced in pressure vessel design and the Authorized Pressure Vessel Inspector
- D. Review all NDE procedures prior to commencement of the NDE used to waive the hydrostatic test requirement
Correct Answer: C 🗳️
Describe the process for re-certifying a pressure vessel that has been out of service for an extended period according to API-510.
Reveal Solution Discussion 0Correct Answer:
Re-certifying a pressure vessel that has been out of service according to API-510 involves a comprehensive inspection and testing process to ensure it meets all current safety standards before being returned to service. This includes a complete internal and external visual inspection, thickness measurements to check for corrosion or erosion, and non-destructive testing to detect any defects.
Additionally, a hydrostatic or pneumatic test must be conducted to verify the integrity of the pressure boundaries. Any issues identified must be repaired, and the vessel must comply with the current versions of the API-510 code before re-certification can be completed.
In API-510, which is not considered a standard practice for extending the life of a pressure vessel?
- A. Periodic recoating of internal surfaces
- B. Regular cleaning and maintenance
- C. Increasing the operating temperature to reduce viscosity
- D. Application of a corrosion inhibitor
Correct Answer: C 🗳️
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