Format
| Part | Questions | Time |
|---|---|---|
| Part A: Fundamentals (closed book) | 165 | 135 minutes |
| Part C: Code Application, AWS D1.1:2020 (open book) | 65 | 135 minutes |
Passing and requirements
72% correct on each part, and a 72% composite (average of Parts A, B and C). Only scored items count; unscored pretest items do not. Totals here cover Parts A and C only (Part B, the hands-on practical, is out of scope).
Part C on our site is written to AWS D1.1/D1.1M:2020.
What's on it
Part A: Fundamentals (closed book)
| Domain | Share of the exam |
|---|---|
| Definitions and Terminology | 15% |
| Welding Processes | 15% |
| Symbols: Welding and NDE | 12% |
| Weld Examination | 12% |
| Welding Performance | 11% |
| Test Methods: NDE | 10% |
| Heat Control and Metallurgy | 7% |
| Welding-Related Calculations | 7% |
| Duties, Responsibilities and Safety | 5% |
| Destructive Tests | 4% |
| Cutting | 2% |
Part C: Code Application, AWS D1.1:2020 (open book)
| Domain | Share of the exam |
|---|---|
| D1.1 Qualification | 30% |
| D1.1 Fabrication | 30% |
| D1.1 Inspection | 30% |
| D1.1 Design, Materials and Records | 10% |
Common questions
Does this cover Part B?
Not yet. Part B is hands-on with replicas. We cover Part A (Fundamentals) and Part C (Code Application on D1.1).
Can my employer pay?
Yes. Checkout gives a receipt with your company name,.
Is the free mock exam really free?
Yes. No account and no card. You get your score, a breakdown by topic and an explanation for every question.
Do you include the code book?
No. AWS codes are copyrighted. Our Part C questions point you to clause numbers so you practice finding them in your own copy.
More about the CWI
- CWI practice test
- Part C and the D1.1 code book
- How hard is the CWI exam?
- CWI exam cost in 2026
- Welding symbols chart
- How to become a welding inspector
Sources
- https://www.aws.org/certification-and-education/professional-certification/certified-welding-inspector/
- https://aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/CWI-Part-A-Fundamental-LanguageAssisted-Exam-Info
- https://aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/CWI-Part-C-Fundamental-LanguageAssisted-Exam-Info
- https://aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/CWI-Examination-User-Guide
- https://aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/QC1-2016-AMD1
- https://aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/AWS-B5.1-2025