Exam Name: Pressure Vessel Inspector
Certification Provider: API
Corresponding Certification: Individual Certification Programs
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- Total Questions: 175
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API API-510 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Repairs, Alterations, Rerating, and Mechanical Integrity | 16% | - Pressure relieving devices and overpressure protection - Rerating, reclassification, and nameplate updates - 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 - Remaining life and corrosion rate calculations - TML/CML selection and measurement planning - Code scope, jurisdiction, and regulatory requirements - Inspection interval determination and extension rules - Records review and baseline data collection |
| Damage Mechanisms and Corrosion Assessment | 22% | - Corrosion under insulation (CUI) and environmental degradation - Damage assessment and prioritization - High-temperature damage and material degradation - Cracking mechanisms (environmental, fatigue, creep) - Internal, external, and localized corrosion |
| Fitness-for-Service, RBI, and Pressure Testing | 12% | - Risk-based inspection (RBI) principles and application - Hydrostatic, pneumatic, and leak testing rules - Acceptance criteria and post-test evaluation - API 579/ASME FFS-1 screening and assessment |
| Design, Materials, and Fabrication Rules | 22% | - Flanges, bolting, gaskets, and special components - Positive material identification (PMI) and traceability - ASME Section VIII, V, IX application - Welding, qualification, and PWHT requirements - MAWP, thickness, and joint efficiency calculations - Material selection, properties, and toughness requirements |
API-510 Questions and Answers
The package includes 175 practice questions for the API-510 exam, all verified and arranged in a well-balanced mix of difficulty to support progressive study.
- Fitness-for-Service, RBI, and Pressure Testing (12%)
- Design, Materials, and Fabrication Rules (22%)
- Repairs, Alterations, Rerating, and Mechanical Integrity (16%)
Let the topic weights guide how you split your study hours.
The API Pressure Vessel Inspector questions are spread across a well-proportioned range of difficulty, from fundamentals to challenging items. That distribution lets you build confidence session by session, and by the time the real test approaches, you have already faced everything it can reasonably throw at you.
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
The API-510 exam contains 170 (140 scored + 30 unscored pretest; 110 closed-book + 60 open-book) questions within 450 (total exam day: 7.5 hours; 165 min closed-book + 225 min open-book + 45 min break) minutes. Rehearsing under the same limit on the Lead1Pass simulator builds calm, practiced pacing.
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API Pressure Vessel Inspector Sample Questions:
When developing an inspection plan for equipment operating at elevated temperatures,
____________ having knowledge of elevated temperature and metallurgical effects on vessel materials of construction should be consulted
- A. A pressure vessel repair organization
- B. A registered professional engineer
- C. A corrosion specialist
- D. An authorized Inspector
Correct Answer: C 🗳️
When a vessel is to be entered for an internal inspection which of the following precautions should be observed?
- A. Inspect the vessel for proper electrical grounding
- B. The area should be roped off and no one else is to be working in the area
- C. No hot work permits in the immediate area must be issued until the inspection is complete
- D. OSHA rules should be reviewed and followed where applicable
Correct Answer: D 🗳️
For alterations or repairs on vessels that were previously post-weld heat treated as a code requirement and fabricated of P-1 and P-3 materials, preheating is not to be less than ___________ may be considered as an alternative to PWHT.
- A. 500˚F
- B. 900˚F
- C. 300˚F
- D. 700˚F
Correct Answer: C 🗳️
Widely scattered pits may be ignored as long as all but which of the following is true?
- A. No pit depth greater than 1/2 the vessel wall exclusive of the corrosion allowance
- B. No pit depth greater than 2/3 the vessel wall exclusive of the corrosion allowance
- C. Sum of dimensions along a straight line does not exceed 2 inches
- D. Total area of pits does not exceed 7 square inches in any 8" diameter circle
Correct Answer: B 🗳️
Who must be consulted before the repair of a crack at a discontinuity where stress concentrations may be serious?
- A. The National Board inspector
- B. The pressure vessel engineer
- C. The owner-user
- D. The vessel manufacturer
Correct Answer: B 🗳️
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