Certified welding inspector study plan: 30, 60 or 90 days

The exam you're planning around

You need 72% on each of three parts, and the order is fixed: Part B first, then Parts A and C.

Read how to become a CWI for the eligibility rules and the full route, and the CWI test dates by state to work back from a real test date. Seminar and exam fees are in the cost guide, and the CWI study guide lists what to learn in each part and in what order. Don't build a plan that has to be paid for twice. To weigh those costs against the credential, see is the CWI certification worth it.

Day 1 for every plan: take the check

Before you commit to a timeline, spend ten minutes on the free 10-question check for the part you're taking first. It's scored by area, so the result shows which topics you can skip and which need weeks. Strong on processes and symbols but weak on metallurgy? Your plan changes. Do this on day 1, and again at the end of each phase to see movement.

Which timeline fits you?

These are planning ranges, not promises. A strong background shortens the plan and a gap lengthens it. For what's known about outcomes, see what AWS publishes on pass rates.

The 30-day plan: one part, one topic a day

Best for Part A when you already work around welding inspection.

• Week 1: welding processes, joint types and definitions. Read welding processes for the CWI exam and daily recall the vocabulary.
• Week 2: symbols and NDE. Work the Part A guide and its symbol and NDE links.
• Week 3: metallurgy, destructive testing, calculations and duties. Do the math by hand until the formulas are automatic.
• Week 4: timed practice. Run 40 to 50 mixed questions at a time under the clock, review every miss and retake the check.

The 60-day plan: add Part B

Best when you know the shop and need the inspector's skills.

• Days 1 to 30: Part B first, since it comes first at the exam. Learn the gauges and the Book of Specifications. Practice readings on the weld gauge trainer and use the Part B guide.
• Days 31 to 50: Part A as in the 30-day plan, compressed to one topic every other day, with the weakest areas first.
• Days 51 to 60: Part C navigation if you're taking it close behind, then a full timed review.

The 90-day plan: all three parts

Best for newcomers to inspection, or anyone taking the three parts within a short window.

1. Days 1 to 10: foundations. Drawings, symbols and welding vocabulary. Take the check for each part.
2. Days 11 to 40: Part A content. One domain per few days, with 10 to 15 recall questions at the end of each.
3. Days 41 to 65: Part B skills. Gauge work three to four times a week and specification lookups. Review visual weld inspection in three stages.
4. Days 66 to 85: Part C. Buy or open the code edition AWS lists, then drill clause-finding with the D1.1 navigation drill. Choosing a code? See D1.1 or API 1104.
5. Days 86 to 90: consolidate. Retake all checks, patch the last gaps and rest before test day.

A weekly rhythm that works for any plan

• Three study blocks of 60 to 90 minutes, each on one topic.
• One timed block that mimics the exam format.
• One review block to redo every miss and write the reason in one line.
• One rest day. Memory consolidates when you stop.

Track misses by domain, not by question. Patterns show you where to spend the next week.

Adjust the plan with the numbers

After each timed block, count misses per domain. If one domain holds most of them, give it half your next week. If misses are scattered, the issue is probably pace or careless reading. Retake the free check at the end of each phase. Start with the Part A check here, and the result shows exactly which areas to study first. If you've already sat an exam part, the rebuild plan for a failed part uses the same approach.

FAQ

How long should I study for the CWI exam?

Plan on about 30 days for one part with a strong background, around 60 for two or three parts with shop experience and 90 if the material is new. Your first check score is a better guide than any rule of thumb.

Which part should I study first?

Part B, because it comes first in the exam order. Wait for its confirmation letter before you book travel for the later parts. Start Part A reading at the same time if your timeline is long.

Do I need the seminar?

Seminar training is optional. Choose prep around your gaps and compare the costs in the exam cost guide before you pay.

What do I need for Part C?

The code edition AWS lists for your exam, and practice finding clauses fast on a screen with word search off. Read the Part C D1.1 guide for the format and a routine.