Free NBIC R – Repair Inspector Exam Practice Test Quiz – With The Latest Questions
50 practice questions • All 9 exam objectives • Answers, explanations and code references
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Are you looking for a free NBIC R – Repair Inspector Exam Practice Test Quiz with the Latest Questions and Answers
Preparing for the National Board NBIC R – Repair Inspector Endorsement Exam? Take our free online practice test with multiple-choice questions, correct answers, and detailed explanations to improve your understanding of the examination requirements.
Welcome to UpWeld’s Free NBIC R Repair Inspector Exam Practice Test, designed for inspectors, inspection trainees, welding and quality professionals, and candidates preparing for the National Board Repair Inspector (R) Endorsement Examination.
Our practice questions cover the major examination objectives, including material identification, welding procedures, nondestructive examination (NDE), heat treatment, pressure testing, Quality Management Systems (QMS), joint reviews, repairs and alterations, and Inspector Diary requirements.
The questions focus on practical situations involving boilers, pressure vessels, pressure piping, repair organizations, and the responsibilities of commissioned Repair Inspectors.
What you will find on this page:
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Free NBIC R Repair Inspector practice test questions and answers.
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Correct answers with explanations to support self-study.
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Latest exam pattern, duration, and passing score.
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Complete NBIC R exam syllabus and study topics.
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Eligibility requirements and how to apply for the R Endorsement.
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Recommended NBIC, ASME, and National Board reference books.
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Examination rules, re-examination, and endorsement renewal information.
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Preparation tips and a recommended study plan.
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Information about our optional 300+ question study bank.
Start Your Free NBIC R – Repair Inspector Exam Practice Test
Take the free NBIC R practice quiz below and test your knowledge before the actual examination.
Our original practice questions are based on the technical objectives covered by the National Board Repair Inspector Body of Knowledge (NB-464) and applicable reference-code provisions.
The quiz includes technical questions about welding qualifications, material traceability, NDE acceptance requirements, repair classifications, inspection documentation, and pressure-testing procedures.
How to use the free practice test:
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Read each multiple-choice question carefully.
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Select the most appropriate answer from options A, B, C, or D.
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Check the correct answer and explanation.
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Review the relevant NBIC or ASME requirement.
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Repeat the practice test to improve your accuracy and code-reference skills.
START FREE NBIC R REPAIR INSPECTOR QUIZ
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The free questions are educational practice material. They are not copied from the National Board’s confidential examination.
What Is the NBIC R – Repair Inspector Endorsement?
The National Board Repair Inspector (R) Endorsement is a specialized qualification issued by the National Board of Boiler and Pressure Vessel Inspectors (NBBI) to eligible commissioned inspectors.
The endorsement establishes that an individual has satisfied the applicable requirements for inspection duties involving repairs and alterations of pressure-retaining equipment under the National Board Inspection Code (NBIC).
Repair Inspector duties may involve pressure vessels, power boilers, heating boilers, pressure-retaining piping, welded repairs, replacement parts, and alteration activities.
An R Endorsement is associated with an existing National Board Inservice Inspector (IS) Commission or Authorized Inspector (AI) Commission.
Difference Between the R Endorsement and R Stamp
These two National Board qualifications are not the same.
| R Endorsement | R Certificate of Authorization |
|---|---|
| Issued to an eligible individual inspector | Issued to a qualifying repair organization |
| Qualifies the inspector for applicable repair and alteration inspection duties | Authorizes an organization to perform repairs or alterations within its approved scope |
| Governed primarily by NB-263, RCI-1 | Governed by NBIC Part 3 and NB-415 |
| Requires applicable inspector qualifications, training, and examination | Requires an acceptable QMS, accreditation review, and other organizational controls |
The NBIC R examination discussed on this page is for the individual Repair Inspector Endorsement, not for obtaining a company’s R Certificate of Authorization.
NBIC R Repair Inspector Exam Pattern
The National Board Repair Inspector Endorsement Examination is an open-book, multiple-choice examination.
| Exam Detail | Official Pattern |
|---|---|
| Exam name | Repair Inspector (R) Endorsement Examination |
| Exam authority | National Board of Boiler and Pressure Vessel Inspectors |
| Question format | Multiple-choice questions (MCQs) |
| Total questions | 50 |
| Exam duration | 4 hours |
| Passing score | 70% |
| Minimum correct answers | 35 out of 50 |
| Examination type | Open-book |
| Official course | National Board Repair Inspector Course (R) |
| Examination delivery | Applicable in-person examination arrangements or approved on-demand provider |
| Main technical reference | NBIC Part 3, Repairs and Alterations |
To pass the NBIC R Exam, candidates must answer at least 35 of the 50 questions correctly.
Although the examination is open-book, candidates must be able to identify the correct code provisions, interpret technical requirements, and apply them to inspection scenarios.
The official handbook and examination catalog should be checked for the applicable permitted books, examination instructions, and current scheduling arrangements.
NBIC R Repair Inspector Exam Syllabus – All 9 Main Objectives
The National Board Body of Knowledge for Repair Inspectors, NB-464, identifies the principal knowledge areas for preparing for the R examination.
1. Material Identification
Candidates should understand how to identify and verify materials used for repairing or altering pressure-retaining items.
Important topics include:
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Material specifications and allowable material selection.
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Identification of existing materials.
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Material Test Reports (MTRs).
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Material marking and heat-number traceability.
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Material compatibility and weldability.
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Replacement parts and material documentation.
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Control of welding electrodes, filler metals, and other consumables.
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Inspector responsibilities for reviewing material documentation.
Practice focus: Determine whether material is acceptable, properly identified, and traceable before installation or welding.
2. Welding
Welding is a major technical area because many repairs and alterations involve welded pressure-retaining components.
Important topics include:
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Welding Procedure Specifications (WPS).
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Procedure Qualification Records (PQR).
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Standard Welding Procedure Specifications (SWPS).
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Welder Performance Qualifications (WPQ).
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Welding Operator Performance Qualifications (WOPQ).
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Essential, nonessential, and supplementary essential variables.
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Welding process qualifications.
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Welder qualification ranges and process continuity.
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Weld repairs, defect removal, and joint preparation.
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Welding records and welder-to-weld traceability.
Practice focus: Determine whether a welding procedure and welder are qualified for the proposed work under ASME Section IX and the applicable NBIC requirements.
3. Nondestructive Examination (NDE)
Candidates must understand the purpose, applicability, procedures, personnel qualifications, and acceptance requirements of common examination methods.
Important topics include:
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Radiographic Testing (RT).
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Ultrasonic Testing (UT).
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Magnetic Particle Testing (MT).
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Liquid Penetrant Testing (PT).
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Visual Testing (VT).
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NDE personnel qualification and certification.
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NDE written procedures.
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Examination extent and timing.
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Identification and evaluation of weld discontinuities.
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Acceptance criteria and alternative NDE methods.
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Examination reports and records.
Practice focus: Select an appropriate NDE method, identify applicable examination requirements, and assess whether inspection results comply with the governing code.
4. Heat Treatment
Heat treatment is an important subject when repairing carbon steel, alloy steel, and other pressure-retaining materials.
Important topics include:
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Preheating requirements.
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Minimum and maximum temperature controls.
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Interpass temperature requirements.
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Postweld Heat Treatment (PWHT).
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Local PWHT and controlled heating methods.
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Heating and cooling rates.
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Holding temperatures and soaking times.
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Temper-bead welding.
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Alternative welding methods without PWHT.
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Heat-treatment procedures and documentation.
Practice focus: Evaluate whether the proposed welding and heat-treatment arrangement satisfies the applicable material and construction-code requirements.
5. Pressure Testing
Candidates must understand how repair and alteration integrity is verified through pressure tests and other permitted testing methods.
Important topics include:
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Hydrostatic or liquid pressure testing.
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Pneumatic pressure testing.
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Initial service leak testing.
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Vacuum testing.
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Test-pressure selection and calculations.
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Pressure-test hold times.
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Test temperature and brittle-fracture precautions.
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Pressure relief device precautions.
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Pressure gauge calibration.
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Inspector witnessing requirements.
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Alternative examination and testing arrangements.
Practice focus: Determine a suitable testing method and assess compliance with the applicable pressure, temperature, safety, and inspection requirements.
6. Quality Management Systems (QMS)
Repair Inspectors must understand how an R Certificate Holder establishes, implements, and maintains an acceptable Quality Management System.
Important topics include:
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R Stamp QMS requirements.
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Scope of repair and alteration activities.
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Management authority and responsibilities.
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QMS manual and document control.
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Design and drawing controls.
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Material control and welding procedures.
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NDE, heat treatment, and examination controls.
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Equipment calibration.
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Subcontractor control.
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Nonconformance and corrective-action procedures.
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R Symbol Stamp control.
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Inspection and certification records.
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Records retention.
Practice focus: Identify QMS deficiencies and determine whether the organization is implementing its approved procedures correctly.
7. Joint Review Process
Candidates should understand the National Board accreditation and review process for R Certificate Holders.
Important topics include:
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Initial accreditation reviews.
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Renewal and triennial reviews.
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Review-team composition.
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Jurisdiction and AIA responsibilities.
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QMS manual review.
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QMS implementation verification.
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Review demonstrations and mock-ups.
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Qualification Review Reports (QRR).
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Certificate scope and authorization.
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Review findings and corrective actions.
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Repair Inspector and Supervisor participation.
Practice focus: Understand the responsibilities of the review team and how an organization’s QMS implementation is evaluated.
8. Repairs and Alterations
This objective concerns the proper classification, planning, execution, examination, and documentation of repair and alteration work.
Important topics include:
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Difference between a repair and an alteration.
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Routine versus nonroutine repairs.
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Repair methods for pressure-retaining components.
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Weld buildup and corrosion-related repairs.
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Replacement parts and pressure-retaining attachments.
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Nozzle additions and design changes.
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Defect removal and repair welding.
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Rerating and design calculations.
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Applicable jurisdictional acceptance.
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Form R-1, R-2, R-3, and R-4 requirements.
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Documentation, registration, and stamping.
Practice focus: Determine whether proposed work is a repair or alteration and identify the appropriate inspection, design, and documentation requirements.
9. Inspector Diary
Repair Inspectors must maintain appropriate inspection activity records and monitor the accepted QMS of assigned Certificate Holders.
Important topics include:
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Inspector Diary ownership and control.
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Bound and electronic diary requirements.
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Daily inspection records.
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Inspection observations and findings.
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Inspection hold points.
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Reasons for using alternative NDE methods.
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Inspector signatures and Commission numbers.
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Monitoring of QMS activities.
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Nonconformance reporting.
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Corrective-action verification.
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Record retention and supervisory review.
Practice focus: Determine what information must be recorded and how the Inspector demonstrates that inspection and monitoring duties have been completed.
Who Should Take the NBIC R Repair Inspector Exam?
The R Endorsement is intended for eligible National Board commissioned inspectors who wish to perform repair and alteration inspection duties.
Professionals who may benefit from studying the material include:
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National Board Inservice Inspectors (IS).
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National Board Authorized Inspectors (AI).
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Repair Inspector trainees.
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Authorized Inspection Agency personnel.
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Boiler and pressure vessel inspection professionals.
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Welding inspection and quality-control professionals.
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Engineers involved in pressure equipment repair design.
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Repair organization Quality Managers and Supervisors.
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Personnel preparing to pursue a National Board inspector commission.
Important: Welding inspectors, NDE professionals, QA/QC engineers, and other technical personnel may use this free practice test for learning, but professional experience alone does not establish eligibility for the R Endorsement.
Applicants must satisfy the current National Board Commission, training, experience, examination, and employer requirements.
Eligibility Requirements for the NBIC R Endorsement
The R Endorsement requirements are established primarily in NB-263, RCI-1.
1. Hold a National Board Commission
A candidate seeking the R Endorsement must hold an applicable National Board Inservice Inspector (IS) Commission or Authorized Inspector (AI) Commission.
The R Endorsement is added to an eligible inspector’s qualification; it is not a replacement for the underlying commission.
2. Complete the National Board R Course
Candidates must satisfactorily complete the National Board Repair Inspector Course (R).
The National Board offers course sessions according to its published training calendar, with delivery arrangements that may include classroom and virtual instruction.
Course length, tuition, available dates, and examination arrangements should be confirmed in the current official course catalog.
3. Complete the Applicable Experience Requirements
Under the 2025 RCI-1 qualification rules, an IS Commission holder seeking the R Endorsement must complete 80 hours of diversified Repair Inspector trainee experience, including applicable supervised on-the-job training.
The standard permits qualifying credit for specified Authorized Inspector training and limited participation as an observer in a National Board joint review.
The exact experience requirements and permitted credits depend on the applicable commission and current RCI-1 provisions.
Trainees must not independently perform Code-required Repair Inspector inspections or sign repair documents or the Inspector Diary.
4. Pass the R Examination
Candidates must pass the National Board R Endorsement Examination with a score of at least 70%.
5. Apply Through the National Board
Candidates and employers complete the appropriate application through the National Board Business Center.
The employer must verify and certify the candidate’s qualifications and required information.
6. Meet Applicable Employment and Jurisdictional Requirements
Inspector commissions and endorsements are subject to the employment requirements established by RCI-1.
Additional jurisdictional authorization or requirements may apply where inspection activities are performed.
Remember: Passing the examination is only one part of obtaining the R Endorsement.
How to Apply for the NBIC R Endorsement
Follow these steps:
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Verify your existing IS or AI Commission status.
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Review the current RCI-1 qualification requirements.
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Arrange the required supervised experience, if applicable.
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Enroll in the National Board Repair Inspector Course.
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Prepare using NB-464 and the required reference codes.
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Take and pass the R Endorsement Examination.
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Complete the R Endorsement application jointly with your employer.
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Submit supporting documentation and applicable fees through the National Board system.
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Await confirmation that the endorsement has been issued before performing duties requiring that endorsement.
Under the 2025 RCI-1 provisions, an endorsement application must be submitted within two years after passing the examination. If the endorsement has not been issued within that period, re-examination is generally required unless an applicable National Board PEI Repair Qualification exception is satisfied.
Official links:
Recommended Books for NBIC R Repair Inspector Exam Preparation
The National Board’s NB-464 Body of Knowledge identifies the main technical references candidates should study.
| Book or Standard | Main Study Purpose |
|---|---|
| NBIC Part 3 – Repairs and Alterations | Repair classifications, alteration requirements, examinations, pressure testing, QMS, and documentation |
| NB-263, RCI-1 – Rules for Commissioned Inspectors | Qualification, Inspector responsibilities, monitoring, diary, ethics, and renewal |
| NB-415 – Accreditation of R Repair Organizations | R Certificate Holders, QMS review, accreditation, and renewal |
| ASME BPVC Section I | Construction requirements for power boilers |
| ASME BPVC Section IV | Construction requirements for heating boilers |
| ASME BPVC Section VIII, Division 1 | Pressure vessel design and construction requirements |
| ASME BPVC Section IX | Welding procedures, PQRs, SWPSs, and personnel qualification |
| ASME B31.1 – Power Piping | Piping welding, examination, heat treatment, and pressure-testing requirements |
Additional construction-code references, material tables, and NDE standards may be useful where relevant to the particular technical question.
Important: The NB-464 reference list is a syllabus and preparation guide. The official list of books and editions permitted inside the examination must be checked separately in the current National Board R Course instructions.
How to Study the Code Books
Rather than trying to memorize every paragraph, candidates should become familiar with:
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Where specific requirements are located.
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When the original construction code governs.
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When an NBIC alternative may be permitted.
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Which activities require Inspector or Jurisdiction acceptance.
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How to identify essential welding qualification variables.
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How repair requirements differ from alteration requirements.
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How to interpret conditional limits, tables, and exceptions.
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How inspection results must be documented.
Regular practice with code-based MCQs can help build the skills needed for an open-book examination.
NBIC R Open-Book Examination Rules
The National Board Candidate Handbook, NB-465 Revision 1, identifies specific examination rules.
Candidates should review these rules before taking the examination.
The handbook permits previously highlighted reference text and tabs identifying paragraph numbers or paragraph names, subject to its restrictions.
Reference material must not contain unauthorized inserted pages, exam answers, crib sheets, or other prohibited notes. Blank tabs must be removed.
Writing or underlining in Code books during the examination is not permitted.
Only permitted calculators and reference materials may be brought into the examination area. Cell phones, smartwatches, and unauthorized recording or communication devices are prohibited.
Always follow the latest examination instructions supplied by the National Board and the test provider.
NBIC R Exam Re-Examination – What If You Fail?
Candidates who do not achieve the required passing score may be eligible to take the examination again.
According to NB-263, RCI-1, an applicant who fails an examination three times within a 12-month period cannot take that examination for at least 12 months following the last attempt.
Candidates who fail receive an examination score report identifying performance by exam objective, as described in the National Board Candidate Handbook.
How to Prepare for a Re-Exam
If you do not pass on your first attempt:
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Review the objectives in which your score was lowest.
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Revisit the applicable NBIC and ASME paragraphs.
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Practice identifying conditional requirements and exceptions.
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Solve additional scenario-based questions.
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Practice completing 50 MCQs within four hours.
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Confirm your eligibility and registration arrangements for another attempt.
Avoid relying only on memorized answers. Understanding the requirements and locating the correct references is more useful for unfamiliar examination scenarios.
NBIC R Endorsement Renewal and Recertification
The National Board R Endorsement must be maintained in accordance with the current RCI-1 renewal requirements.
Under the 2025 edition:
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National Board Commissions expire annually on December 31.
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The R Endorsement expires concurrently with the underlying commission.
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The employer handles applicable commission and endorsement renewals.
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Applicable continuing education is required for renewal.
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The required continuing education category for the R Endorsement is B&PV Repair.
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Continuing education is not required during the year in which the commission or endorsement was issued.
A routine annual renewal does not automatically require retaking the R examination when the applicable renewal conditions are satisfied.
What If an R Endorsement Has Expired?
RCI-1 provides separate rules for reinstatement.
If a commission or endorsement has not been renewed for less than two years, reinstatement may be possible through the applicable application and recent continuing education requirements.
If it has not been renewed for more than two years, reinstatement generally requires application and successful completion of any required examinations, subject to the specified PEI certification exceptions.
Changes of employment must also be processed through the appropriate National Board procedure. An unexpired card does not remain valid automatically after termination of the employment on which it was issued.
Note: This is the renewal of an individual’s R Endorsement. The organizational R Certificate of Authorization has a separate accreditation and renewal process under NB-415.
How to Pass the NBIC R Repair Inspector Exam – Preparation Strategy
Because the examination is open-book, efficient reference use is especially important.
Step 1: Read the Body of Knowledge
Begin with NB-464 and identify the nine examination objectives.
Step 2: Study NBIC Part 3
Give particular attention to repair and alteration classifications, welding, NDE, pressure testing, QMS, and documentation.
Step 3: Study RCI-1 and NB-415
Understand the qualification and responsibilities of Repair Inspectors, the Inspector Diary, QMS monitoring, and R Certificate accreditation reviews.
Step 4: Review ASME Section IX
Practice questions involving WPS, PQR, SWPS, performance qualification, essential variables, and welder continuity.
Step 5: Practice With Construction Codes
Review relevant design, welding, examination, and testing provisions of ASME Sections I, IV, VIII Division 1, and B31.1.
Step 6: Take Timed Mock Exams
Complete 50 original multiple-choice questions within the four-hour examination period.
Step 7: Review Incorrect Answers
For every incorrect answer, identify the controlling paragraph, table, note, or exception and understand why the other options are wrong.
Step 8: Repeat Until Consistent
Aim to perform comfortably above the official minimum passing score during practice rather than stopping immediately when you reach 70%.
Suggested Four-Week NBIC R Exam Study Plan
| Study Period | Recommended Topics |
|---|---|
| Week 1 | Material identification, welding, WPS, PQR, SWPS, and qualifications |
| Week 2 | NDE, heat treatment, pressure testing, and related Code requirements |
| Week 3 | QMS, joint review, repair and alteration classification, and documentation |
| Week 4 | Inspector Diary, mixed mock exams, code navigation, and review of weak areas |
This is a suggested UpWeld study plan, not a mandatory National Board course schedule.
Buy the Latest NBIC R – Repair Inspector Exam Question Bank – 300+ Practice Questions
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NBIC R Question Bank Details
| Study Material | Details |
|---|---|
| Product | NBIC R – Repair Inspector Exam Question Bank |
| Total questions | 300+ practice questions |
| Question type | Multiple-choice questions |
| Difficulty | Mixed, including hard-level scenarios |
| Coverage | All nine main NBIC R exam objectives |
| Answers | Correct answers with explanations |
| Price | $25.00 USD |
| Ordering | Email or WhatsApp |
What You Get With the Paid Study Material
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300+ original NBIC R Repair Inspector practice questions.
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Multiple-choice questions with correct answers.
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Explanations to improve understanding of technical requirements.
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Practice across material identification, welding, NDE, heat treatment, pressure testing, QMS, joint reviews, repairs and alterations, and Inspector Diary requirements.
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Scenario-based questions to develop inspection judgment.
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Additional study material and free learning guidance provided with the question bank.
Question Bank Price: Only $25.00 USD
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WhatsApp to Order: Contact UpWeld on WhatsApp
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Why Practice With the UpWeld Question Bank?
Preparing for an open-book technical examination requires more than remembering answers.
Our practice material is intended to help you understand inspection situations, identify relevant Code requirements, recognize common mistakes, and become more comfortable working through difficult multiple-choice questions.
The additional question bank is optional. You can continue using the free quiz on this page without purchasing anything.
Important disclaimer: UpWeld is an independent educational website and is not affiliated with, authorized by, or endorsed by the National Board of Boiler and Pressure Vessel Inspectors. The question bank contains independently prepared practice questions, not actual confidential examination questions. No specific exam-question appearance, score, certification result, or passing outcome is guaranteed.
Conclusion – Start Your Free NBIC R Exam Practice Test Today
The National Board R – Repair Inspector Endorsement Examination requires an understanding of repair and alteration procedures, welding qualifications, material identification, NDE, heat treatment, pressure testing, quality management, and Inspector responsibilities.
Success requires both technical knowledge and the ability to apply the correct code provisions to practical inspection scenarios.
Start the free NBIC R Repair Inspector practice quiz on UpWeld, review the explanations, and use the recommended references to strengthen your preparation.
If you need additional practice, you can also order our 300+ NBIC R Exam Question Bank for $25 USD.
For study material enquiries, contact upweld.org@gmail.com or WhatsApp.
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Official Sources and Further Reading
Exam and certification information reviewed for 2026. Candidates should verify current rules, permitted reference editions, training dates, and application requirements directly with the National Board before registration.
1. How many questions are in the NBIC R Repair Inspector Exam?
The official R Endorsement Examination consists of 50 multiple-choice questions.
Candidates must achieve at least 70%, equivalent to 35 correct answers out of 50.
It is an open-book examination. Only the reference materials and other items permitted under the current examination rules may be used.
The official examination catalog specifies a four-hour examination period.
The published examination format specifies multiple-choice questions. Technical scenarios and calculations may be included within the MCQ format.
The R Endorsement is intended for eligible individuals holding an applicable National Board IS or AI Commission. Passing the R exam alone does not establish endorsement eligibility.
Yes. Successful completion of the applicable National Board Repair Inspector Course is part of the R Endorsement qualification requirements.
Re-examination may be permitted, but candidates who fail three times within a 12-month period must wait at least 12 months after the last attempt before taking the examination again.
Yes. It expires concurrently with the underlying National Board Commission and is subject to the applicable annual renewal and continuing education requirements.
Form R-1 documents repairs performed under the NBIC. Form R-2 documents alterations. Additional information or supporting records may be required depending on the work.
Yes. Free original MCQs help candidates practice technical concepts, inspection decisions, and code-reference skills. They should be used together with the official Body of Knowledge and applicable code books.
Yes. UpWeld offers a separate study question bank containing 300+ practice questions with answers and explanations for USD $25.