CWI Part B practice test: two 46-question mocks with Book of Specifications references
Most questions are decisions under the Part B Book of Specifications (BOS): accept or reject a weld, say what a PQR or a welder test qualifies, read a table or annex.
- BOS clause, table or annex named
- Every answer explained
- Score by Part B domain
- Real Part B count and time
- Welding Inspection and Flaws34% min
- Procedure and Welder Qualifications28% min
- Mechanical Test and Properties8% min
- NDE8% min
- Utilization of Specification and Drawings8% min
- 92 original Part B questions
- Two 46-question mocks, 120 minutes each
- All 5 Part B domains
- Book of Specifications references in the answers
- Every answer explained
Start with the free sample
The 3 free questions (an undersized fillet weld, a welder's filler metal range and a drawing tolerance) run in the same test player as the mocks. Each mock is 46 questions across the five Part B domains, each domain at or above the minimum share AWS publishes, with a 120-minute clock. AWS's pass mark for Part B is 72%.
Double-checked questions Real exam pattern Free sample · 3 questions
Full tests 3 tests
One payment unlocks both tests
- 92 original Part B questions
- Two 46-question mocks, 120 minutes each
- All 5 Part B domains
- Book of Specifications references in the answers
- Every answer explained
₹2,299·no subscription
Every test: instant score, answer review and a breakdown of topics to work on
Free sample
Free samplePart B practice mock 1
Included in the full set
Part B practice mock 2
Included in the full set
How the practical exam is practised here
2 mocks of 46 questions with a 120-minute clock, the question count and time of the real Part B. Most questions are decisions under the Part B Book of Specifications (BOS): accept or reject a weld, say what a PQR or a welder test qualifies, read a table or annex. Those answers name the BOS clause, table or annex they come from; the few general NDE and welding symbol questions follow standard practice. Start with the 3 free questions below.
On the real Part B you measure plastic weld replicas with a tool kit and read documents and photographs in an exhibits booklet that AWS keeps confidential, then decide against the Book of Specifications. Here most questions state the measurement, the narrative or the WPS, PQR or welder test data in words, and you make the same decision against the same book; the general NDE and welding symbol questions follow standard practice. Keep AWS's free Book of Specifications (2017, U.S. customary) open while you practise. Every question is our own; none is an AWS exam question, and this practice is not made or endorsed by the American Welding Society.
What is inside
| Part B domain (AWS minimum) | What the questions practise | Questions |
|---|---|---|
| Welding Inspection and Flaws (34%) | Accept or reject under BOS Clauses 2-4: undercut, porosity, undersize, reinforcement and convexity, crack and crater rules, fillet terminations, pipeline IP, IPD, burn-through and accumulation, pressure piping reinforcement and rounded indications, repairs. | 34 |
| Procedure and Welder Qualifications (28%) | PQR thickness ranges (Table 7), PQR variables (Table 8), WPS data (Table 6), welder variables (6.2), positions, diameters and deposit limits (Tables 9, 10, 15), bend counts, F-Number coverage. | 28 |
| Mechanical Test and Properties (8%) | Tensile strength from load and size (Annex V), bend and tensile acceptance (5.4.2, 5.4.3), specimen preparation (Annex IV). | 10 |
| NDE (8%) | Repair examination under 3.1.9.7 and 4.1.9.3, and general NDE practice: which method finds what, magnetic particle and penetrant basics, the Part B tool kit. | 10 |
| Utilization of Specification and Drawings (8%) | Shall / should / may, dimensional tolerances (1.3), annex look-ups (F-, A-, M-Numbers, pipe schedules), conversions, and one welding symbol question on standard practice. | 10 |
| Total | 2 mocks of 46; the 3 free questions are part of mock 1 | 92 |
The five domains and their minimum shares are the ones AWS lists for Part B. Structural steel, pipeline and pressure piping work all appear, as in the Book of Specifications. Each question has one correct answer; the BOS text is not reproduced here, only its clause, table and annex numbers.
What you see after every mock
- Your score out of 46 and your score in each domain, so you can see where the marks go.
- Your time per question, against a 120-minute clock for 46 questions.
- The reason behind every answer, with the BOS clause, table or annex that decides it where there is one.
A score here is your score on our questions. It is not a CWI result and does not predict one.
Part B, as AWS describes it
- Part B (Practical) is a hands-on and written exam: you evaluate a physical characteristic against given acceptance criteria or code requirements and make the decision.
- It has 46 questions, a 120-minute limit and a pass mark of 72%. It is open book: the reference is the Part B Book of Specifications, supplied on the day and free to download from AWS.
- It is a paper-based test at AWS test sites. You also get an exhibits booklet of sample documents and photographs (including WPSs, PQRs and WQTRs), a four-piece plastic weld replica set and an inspection tool kit (fillet weld gauges, V-WAC gauge, dial caliper, ruler, C4.1 gauge, protractor, hi-lo gauge, magnifier, mirror, flashlight).
- You take Part B first: Parts A (Fundamentals) and C (Code Book) can be scheduled only after the Part B confirmation letter.
Sources: American Welding Society, CWI Part B Practical Examination Information (Rev. 03.01.2024) and Examination User Guide for CWI (09.04.2026), read on 23 October 2026; Part B Book of Specifications 2017, read on 30 October 2026. AWS is the authority on the exam.
Before you buy
How can a practical exam be practised online?
The decision is the part you can practise: most questions give you what you would measure or read (a gauge reading, a WPS or PQR value, a welder's test) and ask what the Book of Specifications says; the general NDE and welding symbol questions follow standard practice. Measuring the replicas with the tool kit is something to practise by hand.
Which Book of Specifications edition is used?
This practice uses the 2017 U.S. customary Book of Specifications. AWS uses customary units for exams in the United States and Canada and metric units elsewhere, with a metric edition of the book.
Does this cover Part A or Part C?
No. Part A (Fundamentals) has its own practice test. Part C (Code Book) is not covered.
What do I get?
2 mocks of 46 questions with a 120-minute clock, in the full test player with a question palette and mark for review. After each mock: your score by domain, your time per question and the explanation of every answer. Retake either mock as often as you like.
How do I pay and get access?
One payment by card (or PayPal where offered), handled by our payment provider. In the United States the price is charged in US dollars; in Canada, the United Kingdom and the euro area in your own currency; elsewhere in your own currency where we support it, otherwise in Indian rupees with the local figure shown as an estimate. Access opens on this device straight after payment. Sign in afterwards to keep it on your account. Purchase policy.
Disclaimer
Independent practice material by ProSyllabus. Not written or endorsed by the American Welding Society. These are original questions, not AWS exam questions, and no code or standard text is reproduced. Facts about the exam come from AWS's own documents, read in October 2026.
Are these real AWS Part B questions? No. Every question is our own, written to the five Part B domains. Most answers come from the Book of Specifications; the general NDE and welding symbol answers follow standard practice. The real exhibits booklet and weld replicas are confidential and are not used.