- What You Are Actually Preparing For
- Domain 1: Part A - General Knowledge Examination
- Domain 2: Part C - Code Knowledge Examination
- Domain 3: Part B - Practical Film Interpretation Examination
- Best Books and Reference Materials for CRI Candidates
- Digital Tools and Practice Resources
- Building a Domain-Focused Study Schedule
- Who Hires CRI Credential Holders and Why It Shapes Your Study Focus
- Frequently Asked Questions
- The CRI exam has three distinct parts: General Knowledge (Part A), Code Knowledge (Part C), and Practical Film Interpretation (Part B).
- Part B is the only hands-on component - you physically evaluate radiographic film, making visual practice non-negotiable.
- Code Knowledge requires mastery of specific welding and inspection codes, not general reading comprehension of standards.
- Your best study foundation combines AWS and ASME reference materials with structured practice on real or sample radiographs.
What You Are Actually Preparing For
The Certified Radiographic Interpreter (CRI) credential, administered by the American Welding Society, is not a general NDT awareness certificate. It tests a specific, applied skill set: the ability to read radiographic images of welds, apply the correct acceptance criteria from the governing code, and document findings accurately. The exam is built around three parts that test fundamentally different capabilities, and the materials you choose must reflect that division.
Too many candidates approach CRI prep the same way they would a multiple-choice knowledge test - they read a textbook cover to cover and hope it transfers. It does not. Part B, the practical film interpretation component, rewards candidates who have spent real time looking at radiographs and making accept/reject decisions. No amount of reading replaces that practice.
This guide is built around the three exam domains, matching study materials and strategies to each specific part. Whether you are weeks out from your first attempt or revisiting preparation after consulting the CRI Exam Retake Policy 2026: Rules, Fees and Waiting Periods, the resources below are selected for what the CRI actually tests - not for NDT study in general.
Domain 1: Part A - General Knowledge Examination
Part A is the written multiple-choice component covering the foundational science and technology of radiographic testing. This is where physics knowledge, equipment understanding, and procedural competency are assessed. It is closed-book.
Domain 1: Part A - General Knowledge Examination
Candidates must demonstrate a solid understanding of the principles that govern how radiographic images are produced and what affects image quality. Topics include radiation physics, film and digital detector characteristics, exposure variables, geometric factors, and radiation safety fundamentals.
- X-ray and gamma-ray production - understanding sources including Iridium-192 and Cobalt-60
- Film processing variables and how they affect density and contrast
- Geometric unsharpness, source-to-film distance, and penumbra effects
- IQI (image quality indicator) placement and sensitivity requirements
- Radiation safety principles including dose, shielding, and regulatory framework under 10 CFR and NRC guidelines
- Equipment types: industrial X-ray machines, panoramic sources, and portable gamma units
Primary Study Materials for Part A
The AWS Radiographic Interpretation study guide (available through AWS Bookstore) is the most directly aligned text for this domain. Supplement it with the Nondestructive Testing Handbook, Volume 4: Radiographic Testing published by ASNT. The ASNT handbook is denser but provides the physics depth that Part A questions demand, particularly around film characteristics and geometric factors.
For radiation safety, candidates should review NRC regulatory basics and understand the principles behind ALARA. This is not a licensing exam, but safety principles are embedded in Part A questions.
When reviewing exposure variables, do not just memorize formulas - understand the relationship between each variable and the resulting image. Part A questions are written to test whether you understand the why, not just the what.
Domain 2: Part C - Code Knowledge Examination
Part C is an open-book examination, which misleads some candidates into underestimating it. The ability to bring reference materials into the room is only useful if you already know where to look and understand the structure of the codes. Candidates who are unfamiliar with the organization of the applicable standards lose significant time navigating them under exam pressure.
Domain 2: Part C - Code Knowledge Examination
This part tests the ability to apply specific code provisions to radiographic examination scenarios. Candidates must interpret acceptance criteria, radiographic procedure requirements, and qualification requirements as written in the governing standards.
- AWS D1.1 Structural Welding Code - Steel: radiographic examination provisions and discontinuity acceptance criteria
- ASME Boiler and Pressure Vessel Code, Section V: nondestructive examination procedures and technique requirements
- ASME BPVC Section VIII: pressure vessel acceptance criteria for radiographic examination
- API 1104: pipeline welding standard and its radiographic examination requirements
- Understanding the difference between procedure qualification and performance qualification requirements under each code
- Knowing when radiographic examination is mandatory versus optional under different code applications
How to Study Codes Without Just Reading Them
Passive reading of code documents is ineffective for Part C preparation. The most productive approach is to work through practice scenarios and then locate the answer within the code - this forces you to learn code navigation under time pressure. Create index tabs in your physical copies for the most frequently referenced sections: examination requirements, acceptance criteria, and IQI requirements.
Develop a quick-reference summary of acceptance criteria differences between codes. AWS D1.1, ASME Section VIII, and API 1104 have meaningfully different criteria for the same discontinuity types. Confusing these on exam day is a common and costly error.
Key Takeaway
For Part C, your study goal is not to memorize code language - it is to understand the structure of each standard well enough to navigate it in under two minutes per question. Practice with your actual exam copies, tabbed and annotated, not clean reference copies.
Domain 3: Part B - Practical Film Interpretation Examination
Part B is what separates the CRI from most written certification exams. Candidates are given actual radiographic film sets and must identify discontinuities, classify them correctly, apply the appropriate code acceptance criteria, and render an accept or reject decision. This is a hands-on, time-pressured exercise in applied visual interpretation.
Domain 3: Part B - Practical Film Interpretation Examination
Candidates must demonstrate the ability to interpret radiographic images of welds, identify the nature and extent of discontinuities, and make code-based accept/reject determinations. Visual acuity, systematic evaluation technique, and code application must all work together under exam conditions.
- Identifying weld discontinuity types: porosity, slag inclusions, incomplete fusion, cracks, undercut, and burn-through
- Distinguishing artifact indications from genuine discontinuities
- Measuring discontinuity dimensions and comparing against code allowables
- Evaluating film quality: density range, IQI visibility, and coverage requirements
- Systematic film reading technique - establishing a consistent scan pattern to avoid missed indications
Building Visual Interpretation Skills
There is no shortcut here. Candidates who score well on Part B have spent substantial time in front of actual radiographs - not just photographs of radiographs in textbooks. There are several concrete ways to build this exposure:
- AWS Radiographic Atlas: The AWS atlas of radiographic discontinuities provides labeled film images that are the closest widely available substitute for actual exam film sets. Study every image until you can name the discontinuity type before reading the caption.
- Employer or training center access: Many CRI candidates work in environments where production radiographs are available. Reviewing these - with a qualified Level III - is excellent practical preparation.
- ASNT Training Film Sets: ASNT offers film interpretation training materials that simulate the format of practical examination components. These are worth the investment for candidates who do not have regular access to production radiographs.
- Online image databases: Several NDT training providers maintain digital image libraries. While digital images on a monitor differ from film on a viewer, they are useful for building pattern recognition and discontinuity vocabulary.
Best Books and Reference Materials for CRI Candidates
| Resource | Best For | Exam Part | Open Book Allowed? |
|---|---|---|---|
| AWS Radiographic Interpretation Study Guide | Foundational knowledge, exam-aligned content | Part A (primary), Part B (secondary) | No (Part A closed book) |
| ASNT NDT Handbook Vol. 4 - Radiographic Testing | Physics depth, equipment, film science | Part A | No |
| AWS D1.1 Structural Welding Code | Code navigation, acceptance criteria | Part C | Yes |
| ASME BPVC Section V and Section VIII | Pressure vessel and procedure requirements | Part C | Yes |
| API 1104 | Pipeline weld acceptance criteria | Part C | Yes |
| AWS Radiographic Atlas of Discontinuities | Discontinuity recognition, film reading practice | Part B (primary) | No (practical exam) |
| ASNT Film Interpretation Training Sets | Hands-on film evaluation practice | Part B | No |
Digital Tools and Practice Resources
Online practice testing is valuable for Part A preparation specifically. Multiple-choice practice questions help you identify which physics and equipment concepts are not yet at recall level - the speed at which you can retrieve correct answers matters for a timed closed-book test. The CRI practice test platform provides domain-organized questions that mirror the format of Part A, allowing you to measure your readiness by topic area rather than by overall score alone.
For Part C, some vendors offer digital code navigation exercises, but most candidates find that nothing replaces working with physical tabbed code books. Muscle memory for code structure - knowing that acceptance criteria live in Clause 6 of D1.1, for example - is built through repetition with the actual document.
For Part B, digital radiographic image viewers and virtual simulation tools have improved significantly. While they do not perfectly replicate the experience of reading film on a light box, they are effective for building initial discontinuity recognition vocabulary. Pair digital tools with physical film practice whenever possible.
Building a Domain-Focused Study Schedule
With three distinct exam parts requiring different skills, your study timeline must allocate time by domain - not just by total hours. Most candidates need a minimum of six to eight weeks of structured preparation if they are working full time. Below is a domain-sequenced approach that respects the skill-building requirements of Part B.
Part A Foundation - General Knowledge
- Read AWS Radiographic Interpretation Study Guide, Chapters 1-4 (radiation physics, sources, equipment)
- Review ASNT Handbook Vol. 4 for geometric factors and film characteristics
- Complete daily practice questions on Part A topics; log every missed concept
- Begin radiation safety review (ALARA, shielding basics, regulatory framework)
Part C Code Knowledge - Navigation and Application
- Tab and index all open-book code references: AWS D1.1, ASME Section V, Section VIII, API 1104
- Build a cross-code comparison chart for acceptance criteria by discontinuity type
- Work through 20+ scenario-based code application exercises per week
- Time yourself navigating to answers - target under 90 seconds per code lookup
Part B Film Interpretation - Visual Practice Intensive
- Daily sessions with AWS Radiographic Atlas - identify, classify, and render decisions on every image
- Practice with ASNT film sets or employer production radiographs if accessible
- Integrate Part C code application into film decisions - not just "what is it" but "does it pass D1.1?"
- Establish a consistent film evaluation sequence: density check, IQI check, systematic scan, documentation
Full Integration and Weak-Point Remediation
- Take full-length timed Part A practice tests and review all errors against reference materials
- Conduct timed code navigation drills under simulated exam conditions
- Complete film interpretation sessions that combine discontinuity identification with live code lookups
- If applicable, review the CRI Exam Retake Policy 2026 so you understand your options if one part requires a retake
Who Hires CRI Credential Holders and Why It Shapes Your Study Focus
Understanding the professional context of the CRI helps you prioritize your study emphasis. CRI holders are employed in industries where radiographic examination is a quality assurance requirement - not a best practice. These include pressure vessel and piping fabrication, structural steel construction, pipeline construction and maintenance, power generation (both conventional and nuclear), and aerospace manufacturing.
In structural steel environments, AWS D1.1 is the governing document. In process piping and pressure vessel fabrication, ASME Section V and Section VIII dominate. Pipeline contractors operate under API 1104. Candidates who know which industry they are targeting - or which codes their current employer uses most - should weight their Part C preparation accordingly. The open-book format means depth of familiarity with one or two codes is more valuable than shallow exposure to all of them.
Employers who specify CRI as a hiring requirement are looking for someone who can review radiographic examination records, evaluate technician film interpretation, and make or confirm disposition decisions. This is a quality-assurance and oversight role, which is why the practical film interpretation component of the exam is structured as a decision-making exercise - not just a discontinuity naming exercise.
If you are building your study materials list from scratch and want to align your preparation with what the exam actually tests, reviewing the CRI Study Materials 2026 overview is a useful starting checkpoint before committing to any specific resource purchases.
Frequently Asked Questions
Most candidates find Part B (Practical Film Interpretation) the most challenging to prepare for because it requires hands-on visual skill that cannot be developed through reading alone. Unlike Parts A and C, which can be studied from textbooks and code documents, Part B demands repeated exposure to actual radiographic images and decision-making practice. Start building this skill early - do not leave film interpretation work for the final weeks of your preparation.
AWS specifies which editions of reference documents are permitted for the Part C open-book examination. Check the current CRI Candidate Handbook from AWS for the approved edition list before your exam date. Using a superseded edition with different section numbering or criteria can cause serious navigation problems under time pressure.
The CRI Part C examination covers multiple codes including AWS D1.1, ASME BPVC Section V and Section VIII, and API 1104. You do not need to memorize all provisions, but you must be able to navigate each document efficiently and understand the acceptance criteria differences between them. Building a cross-reference comparison chart during your study period is one of the most practical preparation strategies for this part.
Online practice questions are most directly useful for Part A (General Knowledge), where multiple-choice format mirrors the actual exam structure. For Part B, digital image libraries can help build initial discontinuity recognition vocabulary, but they do not replicate the experience of evaluating actual film on a light box. Use CRI practice tests to sharpen your Part A performance and code vocabulary, but invest separately in physical film interpretation practice for Part B.
The CRI exam parts are evaluated independently. AWS has specific rules governing which parts must be retaken and what waiting periods apply. Before your exam, review the current CRI Exam Retake Policy 2026: Rules, Fees and Waiting Periods so you understand exactly what a partial failure means for your certification timeline and costs.