Pressure Vessel Inspector: API-510 Exam

"Pressure Vessel Inspector", also known as API-510 exam, is a API Certification. With the complete collection of questions and answers, PrepPDF has assembled to take you through 175 Q&As to your API-510 Exam preparation. In the API-510 exam resources, you will cover every field and category in Individual Certification Programs Certification helping to ready you for your successful API Certification.

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  • Exam Code: API-510
  • Exam Name: Pressure Vessel Inspector
  • Certification Provider: API
  • Corresponding Certification: Individual Certification Programs
  • Updated: Aug 04, 2026
  • No. of Questions: 175 Questions & Answers with Testing Engine
  • Download Limit: Unlimited

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API API-510 Exam Syllabus Topics:

SectionWeightObjectives
Design, Materials, and Fabrication Rules22%- MAWP, thickness, and joint efficiency calculations
- ASME Section VIII, V, IX application
- Material selection, properties, and toughness requirements
- Positive material identification (PMI) and traceability
- Flanges, bolting, gaskets, and special components
- Welding, qualification, and PWHT requirements
Repairs, Alterations, Rerating, and Mechanical Integrity16%- Documentation and post-work verification
- Pressure relieving devices and overpressure protection
- Authorization and responsibility for work
- Repair vs alteration definitions and procedures
- Rerating, reclassification, and nameplate updates
Fitness-for-Service, RBI, and Pressure Testing12%- Acceptance criteria and post-test evaluation
- Hydrostatic, pneumatic, and leak testing rules
- API 579/ASME FFS-1 screening and assessment
- Risk-based inspection (RBI) principles and application
Damage Mechanisms and Corrosion Assessment22%- Corrosion under insulation (CUI) and environmental degradation
- Cracking mechanisms (environmental, fatigue, creep)
- High-temperature damage and material degradation
- Internal, external, and localized corrosion
- Damage assessment and prioritization
Inspection Scope, Planning, and Data Evaluation28%- Inspection methods and technique selection
- Remaining life and corrosion rate calculations
- Inspection interval determination and extension rules
- TML/CML selection and measurement planning
- Records review and baseline data collection
- Code scope, jurisdiction, and regulatory requirements

API Pressure Vessel Inspector Sample Questions:

1. Explain the significance of maintaining a corrosion monitoring program for pressure vessels under API-510 and describe the typical methodologies used.


2. 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


3. 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) 300˚F
B) 900˚F
C) 500˚F
D) 700˚F


4. Explain the process and benefits of integrating API-510 inspection standards with ISO 9001 quality management systems.


5. An on-stream inspection can NOT be substituted for an internal inspection unless the remaining life exceeds:

A) 2 years
B) 5 years
C) 4 years
D) 10 years


Solutions:

Question # 1
Answer: Only visible for members
Question # 2
Answer: B
Question # 3
Answer: A
Question # 4
Answer: Only visible for members
Question # 5
Answer: D

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