CWI Part C practice test and D1.1 exam guide

Try a Part C drill

Open your own copy of D1.1:2025 to the bookmarks pane and time yourself. For each one, name the clause where the answer lives. Aim for under a minute each.

1. A fabricator wants to weld a groove joint with a WPS that was never tested, because the joint detail, process and filler all match what the code already accepts. Which clause sets the conditions for that?
2. A welder's last weld with a process was eight months ago. You need to decide if their qualification is still in effect. Where do you look?
3. You've measured undercut on a finished fillet weld in a statically loaded, nontubular connection and need the visual acceptance limit. Which clause and part?
4. A crack turns up in a production weld. Where are the rules for removing it and rewelding the area?
5. Shear studs are going onto a beam flange and you need the production bend-test requirements. Which clause?

Answers

1. Clause 5, Prequalification of WPSs.
2. Clause 6, Part C, welder qualification (period of effectiveness).
3. Clause 8, Part C, the visual acceptance criteria table.
4. Clause 7, Fabrication (repairs).
5. Clause 9, Stud Welding.

Got all five fast? Good. The real test asks you to find the answer inside the clause too, under time. The free check shows whether you can. For the visual acceptance lookup in question 3, D1.1 visual acceptance criteria, explained walks the column-then-row route.

Where the points are

• Qualification, fabrication and inspection are at least 25% each: procedure and welder qualification, workmanship and fabrication requirements, and inspection and acceptance criteria.
• Reports and records and materials and design make up smaller shares, at least 5% each.

AWS publishes these as minimums. The five minimums total 85%, so the remaining 15% of questions can come from any domain.

How to prepare

• Learn the layout of D1.1:2025: which clause covers design, prequalification, qualification, fabrication and inspection, and how the tables and annexes are organized. With word search off, reach every clause by its number through the bookmarks, if bookmarks work.
• Take the free check and time yourself on each question. Finding the clause fast matters as much as knowing the answer.
• Study the edition your exam uses. Tests in 2026 use D1.1:2025, and a retest uses the same code as your original exam. The D1.1 edition guide covers which book to buy.
• Use your own licensed copy. We cite clause numbers only.
• Practice qualification reviews on the WPS and PQR review drill: spot the entry a PQR or welder's WPQ does not cover.

Free Part C practice tests compared

Check the edition before you trust a free Part C test. The free FlexiQuiz D1.1 test is on D1.1:2020, and 2026 exams use D1.1:2025. Practice on the edition you'll sit, with answers that point you to the clause, so the drill matches exam day.

Exam day, step by step

Part C is an open-book, computer-based test at a Prometric test center. Here's the day in order.

1. Get your eligibility code. You can book Parts A and C only after your Part B confirmation letter arrives, because it carries the eligibility codes you use at Prometric. AWS suggests booking at least 30 days ahead, because seats fill fast.
2. Book at Prometric and match your name. Prometric emails a confirmation with the test center, time and exam name. Print it. Prometric turns you away without a valid government-issued ID, or if the name on the appointment doesn't exactly match your ID. Call AWS ahead of time to fix a name problem; leaving it can mean rescheduling and extra fees.
3. Check your ID. It must be current and show your full name, date of birth, a recognizable photo, a signature and an expiration date. No signature on it? Bring a second ID that has one.
4. Arrive 30 minutes early. You sign in, agree to Prometric's rules, and staff check your identity, exam and appointment. Lockers hold your personal items.
5. Expect a security check. Staff check that nothing prohibited comes in: a metal-detector wand, emptied pockets, glasses inspected and large jewelry in the locker, every time you enter the room. Your calculator is inspected at check-in.
6. Know what comes in with you. Your ID, the pencil and scratch paper the test center gives you, your locker key, a hard-copy code book where your exam allows one, and an approved calculator: four-function, construction or non-programmable scientific, not noisy, programmable, alphabetical or memory models. Water in a clear container with labels removed is allowed after inspection. Phones, tablets, wearables, bags, coats, hats and food are not.
7. Accept the agreement and take the tutorial. You agree to the Candidate Attestation Agreement, and a tutorial shows how to move through the test. Tutorial time doesn't come off your test time.
8. Take the exam. There are no scheduled breaks. If you need one, raise your hand. The time comes off your test time, you show ID and pass security again to get back in, and AWS is told about the break.
9. Finish. Raise your hand, and staff confirm the exam ended properly before you leave.
10. Get your results. Prometric emails a preliminary score report within two hours. AWS's score letter follows two to four weeks after your last part. Scores round down to the whole percent, and each part needs 72%.

Staff can't answer questions about exam content, but report any computer problem right away. Exam content is confidential, and sharing it can cost you your scores.

Part C specifics: the code book. Where a printed code book is allowed, it must be an original printed publication or a permanently bound copy with every page secured. Loose pages, folders, binder clips and damaged bindings are out, and errata must be bound in. You may tab, highlight and write margin notes, and staff review the book before the exam. For some Prometric exams printed copies are not allowed at all, and the code is an on-screen PDF instead, so practice with PDF bookmarks either way. Your appointment details tell you which applies to your code. On-screen references are in English only. If you fail Part C, the retest uses the same code.

Find your D1.1 navigation gaps free

Take the free 10-question Part C check. It's scored by domain, takes no signup, and shows exactly where you're losing time or points. When you're ready for the full prep, the Part C course gives you code-navigation drills that train you to find the right D1.1 clause, table or figure fast with bookmarks and clause numbers, a lesson for every exam subject, two full-length timed practice exams, and a worked explanation with every answer that cites the clause.

FAQ

How many questions are on CWI Part C for D1.1?

For D1.1, Part C has 55 questions in 135 minutes, and each part needs 72%.

Is CWI Part C open book?

Yes. For D1.1 the code is shown as a PDF at the test center with word search off, so practice reaching each clause through the bookmarks.

Can you bring your own code book to Part C?

Only where your exam allows a printed code book, and then it must be an original printed publication or a permanently bound copy with errata bound in. Your appointment details tell you whether your code is a printed copy or an on-screen PDF.

Which D1.1 edition does Part C use in 2026?

Tests in 2026 use D1.1:2025, and a retest uses the same code as your original exam.

Can you tab or highlight your Part C code book?

Where a printed book is allowed, you may tab, highlight and write margin notes, and staff review the book before the exam.