The AWS Certified Welding Inspector (CWI) credential is one of the most respected certifications in the welding and fabrication industry. But before you schedule your exam, you need to meet the eligibility requirements set by the American Welding Society. These aren't formalities — AWS takes them seriously, and your application gets reviewed against documented evidence. Practice with the free CWI practice test on PracticeTestGeeks (11 questions with answer explanations).
The CWI exam has three eligibility paths. Which one applies to you depends on your combination of education and experience:
There's also a provision for applicants with a current ASNT Level III or equivalent NDT certification, which can substitute for some experience requirements. Check the AWS QC1 standard directly if you're in that situation.
AWS defines qualifying experience broadly — it doesn't have to be formal welding inspection work. The following all count:
One year of your qualifying experience must be specifically in inspection, testing, evaluation, or supervision of welding. Experience doesn't have to be continuous — you can aggregate years from multiple positions. But you'll need to document it, and AWS will verify it.
Facts verified Oct 28, 2026 against American Welding Society (AWS) — Certification and Education. Dates that have passed are removed automatically.
| Item | Detail | Official source |
|---|---|---|
| Number of questions (Part A – Fundamentals) | 150 questions | American Welding Society (AWS) — Certification and Education |
| Number of questions (Part B – Practical) | Hands-on activities + 46 questions | American Welding Society (AWS) — Certification and Education |
| Number of questions (Part C – Code Book) | 50–65 open-book questions | American Welding Society (AWS) — Certification and Education |
| Time limit | 2 hours per part (2.5 hours seat time) | American Welding Society (AWS) — Certification and Education |
| Passing score | 72% on each part | American Welding Society (AWS) — Certification and Education |
| Exam fee | $1,255 (AWS member) / $1,520 (non-member) for the initial CWI exams | American Welding Society (AWS) — Certification and Education |
| Retake fee | $445 per part (A or C), $870 for A and C, $385 for Part B, $915 member / $1,180 non-member for all parts | American Welding Society (AWS) — Certification and Education |
| Retake policy | Retest within a 3-year period; Part C retest must use the same code | aws-p-001-delivery.sitecorecontenthub.cloud |
| Validity | 9 years, with renewals at years 3 and 6 | American Welding Society (AWS) — Certification and Education |
| Delivery | Parts A & C: computer-based at Prometric centers; Part B: in person at AWS seminar sites | American Welding Society (AWS) — Certification and Education |
| Score release | About 2 weeks after Parts A and C (by email) | American Welding Society (AWS) — Certification and Education |
| Late registration deadline | Fast Track up to 18 business days before the event week, $395 non-refundable | aws-p-001-delivery.sitecorecontenthub.cloud |
| Registration deadline | 6 weeks before the seminar/exam week | aws-p-001-delivery.sitecorecontenthub.cloud |
| Testing window | Parts A and C within 120 days after Part B | aws-p-001-delivery.sitecorecontenthub.cloud |
Facts verified Oct 28, 2026 against American Welding Society (AWS) — Certification and Education. Dates that have passed are removed automatically.
Interactive CWI resources on PracticeTestGeeks, free to start:
AWS CWI exams are administered at testing centers approved by AWS — not at general testing facilities like Prometric or Pearson VUE. AWS coordinates dedicated testing events at specific locations throughout the year.
Here's how CWI testing actually works:
Testing events fill up — especially popular locations in Texas, Louisiana, Ohio, and California. Don't wait until you're fully ready to look at the calendar. Check availability early and register well in advance. Missing a testing window often means waiting months for the next one in your region.
The CWI exam has three parts, all taken on the same day:
You must pass all three parts. If you fail one part, you can retake only that part within a year — you don't have to redo the parts you passed. After one year, you start over entirely.
Part A is closed-book. That alone makes it the hardest part for many candidates. You can't look anything up — you need to actually know welding metallurgy, process principles, discontinuity types, mechanical testing methods, and welding symbol interpretation.
Welding symbols trip up a lot of candidates — even experienced welders who learned visual inspection but never had to read a drawing precisely. AWS A2.4 symbol interpretation gets tested in depth. Make sure you can read any weld symbol combination, including combined groove and fillet welds, supplementary symbols, and tail information.
Metallurgy is another common stumbling block. You don't need to be a metallurgist, but you do need to understand why metals crack, how preheat prevents cracking, what HAZ stands for and why it matters, and how different base metals behave during welding and cooling.
| Pros | Cons |
|---|---|
| CWI exam preparation strengthens your knowledge across all domains | Exam anxiety can affect performance — practice tests help reduce it |
| Passing the exam proves competency to employers and clients | Registration fees are non-refundable if you miss your test date |
| Study materials and practice tests are widely available | Limited retake opportunities may apply with waiting periods |
| Exam-based credentials are portable across states and employers | Exam content updates periodically — use current study materials |
| Clear exam objectives help focus your study plan effectively | Testing center availability may require advance scheduling |
Try these questions from our free CWI practice tests. The correct answer and an explanation follow each question.
Which section of AWS D1.1 contains the requirements for WPS qualification by testing (as opposed to prequalification)?
Answer: C. Section 5
Section 5 of AWS D1.1 covers the qualification of welding procedures by testing, including required test specimens and acceptance criteria.
In radiographic testing, a higher density (darker area) on a film indicates the presence of:
Answer: B. Less material or void-type discontinuities
Darker (higher density) areas on RT film indicate less material for radiation to penetrate, suggesting voids, porosity, or cracks.
In ultrasonic testing, what does the term 'dead zone' refer to?
Answer: B. Region near the transducer face where near-surface defects cannot be detected
The dead zone is the region immediately beneath the transducer face where the ringing of the crystal prevents detection of echoes from near-surface reflectors.
For radiographic testing of a butt weld, which ASME code parameter defines the maximum allowed geometric unsharpness (Ug)?
Answer: B. Material thickness being radiographed
ASME Section V Table T-285 specifies maximum Ug values based on the material thickness being radiographed.
Start with Part A — it's closed-book and therefore requires the most internalized knowledge. The AWS CWI Study Guide covers the content areas explicitly. Don't just read it; test yourself constantly. Flashcards for welding symbols, metallurgy terms, and discontinuity types work well. You need this information to come to mind quickly and accurately under pressure.
For Parts B and C, familiarity with your reference materials is critical. Tabbing your code book takes time upfront but pays off massively on exam day. Know which chapter covers which requirements. For D1.1 users: know where prequalified joint details live, where qualification requirements are, and where the acceptance criteria tables are. If you have to search from page one every time, you'll run out of time.
AWS CWI prep seminars are genuinely useful — not because they reveal secret questions, but because the instructors highlight the areas that trip up candidates most consistently and give you direct experience reading weld specimens. If you can attend one, do it. If you're self-studying, use practice tests aggressively to simulate the actual exam format and build your weak areas before test day.