Fillet Gauge
Start CWI Part C D1.1Start
Free diagnosticsCWI Part ACWI Part BCWI Part C D1.1CoursesCWI Part A courseCWI Part B courseCWI Part C D1.1 courseGuidesCWI Part A: 165 questions, closed book, 10 domainsCWI Part C with D1.1: on-screen PDF, no word searchWhat the CWI exam costs in 2026: fees, retests and seminarsCWI retest rules: which parts, how many times, and what AWS asks forHow to become a CWI: eligibility, timeline and total costD1.1 for CWI Part C: edition and on-screen codeFree toolsCWI seminar and exam dates by city, 2026-27Welding symbols quiz: read the symbol, name the weldFillet weld calculator: leg, throat, area and weld metal weightFillet GaugeAbout and editorial policy

Free 25-question diagnostic · no signup

Free CWI Part C D1.1 practice test

Use this free CWI Part C practice test for the D1.1 track: 25 original questions in about 61 minutes. See your score by published outline domain and practice code navigation with your own licensed D1.1 copy.

Start the free diagnostic
  • 25 questions
  • About 61 minutes
  • Scored by domain

Full CWI Part C D1.1 course: $99, available now. See what's inside →

Exam at a glance

Format
55 questions in 135 minutesBook: open book; D1.1 PDF provided on screen (English only), bookmarks usable, word search NOT enabled; printed bound copy also permitted for D1.1 per the endorsement description
Delivery
Prometric CBT. The D1.1 codebook is provided as an on-screen PDF (word search disabled; learn the bookmarks). A bound printed D1.1 copy is also permitted (D1.1 endorsement description Rev 10.14.2025 and AWS Exam References Guide 1 Aug 2025).
Fee
Included in initial CWI exam fee ($1,255/$1,520). As a stand-alone D1.1 endorsement: $445 member / $540 non-member. Part C retest: $445.
Retakes
Must retest with the same code within the 3-year retest period; general CWI retest limits apply (3 retests in 3 years; training for 2nd/3rd)

What it covers

Qualification25%
Fabrication25%
Inspection25%
Reports and Records5%
Materials and Design5%

Diagnostic questions follow these domains, subject to the available practice questions.

Original practice questions written to the published content outline. Never real or recalled exam questions.

How it works

  1. Answer

    25 questions on a timer. Skip any you don't know.

  2. See your score

    Blueprint-weighted, broken down by domain, with your weakest one named.

  3. Study smarter

    Add your email and exam date to unlock the answer review and a study plan.

The CWI Part C D1.1 course

Available now · instant access

Learn how D1.1 is laid out, drill finding clauses fast, then practice.

  • 9modules of lessonsEvery task on the outline
  • 2full-length timed exams55 questions in 135 minutes each
  • 160practice questionsEach one explained
  • 35code-navigation drillsFind it fast in AWS D1.1
  • 1week-by-week study planSet to your exam date
See all 9 modules
  1. How D1.1 is organized, and its design and materials rules
  2. Prequalified WPSs
  3. Qualifying a WPS by test
  4. Welder, operator and tack welder qualification
  5. Fabrication: preparation, preheat and fit-up
  6. Workmanship, repairs and distortion
  7. Visual inspection acceptance
  8. NDT and its acceptance criteria
  9. Reports and records

Question bank and timed exams: Expert-reviewed: every question was checked by a CWI with 15 years in structural welding (2026-10-19). Every answer key is confirmed by a separate blind solve, and reported errors are fixed within 2 business days.

Practice test FAQ

How long is the free diagnostic?

The free diagnostic has 25 questions and takes about 61 minutes. It is a short study check, rather than a full-length exam simulation.

Is this a free CWI practice test for every part?

Choose Part A for fundamentals, Part B for the practical or Part C for D1.1 code application. Each has its own diagnostic and outline. Part B questions assume you have the Book of Specifications open, as you will on exam day. This site does not offer a Part C diagnostic for other codes.

Is the diagnostic free?

Yes. You can start the diagnostic and see your score and domain breakdown for free, with no signup or payment.

Where does the practice content come from?

These are original practice questions written to the published outline. We never use real or recalled exam items. Treat the results as a starting point for study.

How is the diagnostic scored?

Practice items are grouped by the published outline's domains, subject to available questions. The diagnostic weights domain results using the configured published outline weights. This practice percentage helps set study priorities; it does not predict your exam score or certification outcome.

What do I see after finishing?

You see your overall practice score, a domain breakdown and your weakest domain. Use those results alongside the published outline to choose topics to revisit.

How should I use the result to study?

Review the domains where you struggled, compare them with the published outline and return to your study references. A short diagnostic samples only part of the content; completing it does not establish exam readiness.

  1. 01Free CWI Part C D1.1 diagnostic25 questions, about 61 minutes. See your weakest domain.Start free
  2. 02Part C (D1.1) course with code-navigation trainer$99. Lessons, timed practice exams and a plan around your exam date.See the plans

Want the full picture first?Format, domains, references and published sources in one page.

Read the CWI Part C D1.1 exam guide

Sitting a different exam? Try the CWI Part A or CWI Part B diagnostic.