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CWI Part ACWI Part BCWI Part C D1.1CWI Part C D1.5WPQ2API 1104 Part CICC S1
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For inspectors sitting CWI Part C or the stand-alone API 1104 endorsement

API 1104 Part C course and practice exams

Open book, on the clock: find the right API 1104 section fast.

Plans and prices

$445 to retake Part C at AWS vs $99 to prepare.

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Pick one and we'll suggest a plan.

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Ask Tack about this course AI

Tap a question, or type your own. With Part C (API 1104) course: up to 40 messages a day.

    Answers come from this course's own plans and contents.

    • 3 modules of lessons, each with a short check
    • 2 timed exams at real length: 60 questions, 135 minutes
    • 16 drills on finding the right section in AWS D1.1 fast

    Lifetime access, including your retake

    The CWI exam fee is paid to AWS, not us: $1,255 for AWS members, $1,520 otherwise. An AWS retest costs $385 for Part B, $445 for A or C. AWS 2026 price list.

    Not ready? Try the free 10-question check

    Other options

    Have my manager pay instead

    Your manager pays with a company card. You get the plan.

    Buying for a team, or need an invoice or purchase order? Email us at hello@filletgauge.com.

    Everything in Part C (API 1104) course

    Learn how API 1104 is laid out, drill finding sections fast, then practice.

    One payment. Lifetime access.
    • 3 lesson modules covering every task in AWS's Part C (API 1104) outline
    • 16 drills on finding the right section in your own AWS D1.1
    • A week-by-week study plan built from your free check and exam date
    • 129 original questions, each explained with the reference it uses
    • 2 full-length timed exams (60 questions, 135 minutes), weighted like the real exam
    • After each timed exam, see how each domain moved since your last one
    • Domain scores after every drill show what to study next
    • Exam-day checklist: what to bring, allowed references and the calculator rules
    • Today's 10: ten a day, and every miss comes back until you get it right
    • Listen to Today's 10 on the go
    • Readiness by domain, from your own practice results
    • Every question, reshuffled into new sets aimed at your weakest domain
    • Flashcards for every domain, with spaced review
    • Tack, your AI study assistant

    Best if: You want a structured path to the API 1104 code exam.

    What's covered

    • How API 1104 is organized, and production welding (Outline topics C.2.1 to C.2.3, C.5.1)
    • Procedure and welder qualification under API 1104 (Outline topics C.1.1 to C.1.3)
    • Inspection, acceptance standards and records on pipelines (Outline topics C.3.1, C.3.2, C.4.1)

    See every lesson topic

    In Part C (API 1104) course

    • 129original questions
    • 2timed exams at real length
    • 3modules of lessons
    • 16code-finding drills

    See how Tack answers

    A concave fillet weld's throat

    Both legs of a fillet weld measure right on the gauge, but its face is dished in. What should you check next?

    1. The throat, which can be thinner than the legs suggestYour answer, right
    2. Nothing more, since the legs are what count
    3. The color of the weld face
    4. How far the weld runs along the joint

    You: Why the throat? Both legs were the right size.

    Tack: A dished-in face pulls the surface of the weld back toward the corner. So the shortest distance from the root to the face gets smaller, even while both legs still measure right. That shortest distance is what carries the load, so a concave weld can come up short with legs that look fine.

    Key point: On a concave fillet, check the throat: it can fall short even when both legs measure right.

    An original example, not an exam question. AI can be wrong, so check it against your course.

    What members get

    With the course.

    • Today's 10 on the course home: ten questions picked from your missed questions and your weakest domainToday's 10 10 questions a day from your misses and your weakest domain, so what you got wrong comes back. Plus a missed set of up to 50.
    • The week card's Add my study plan to my calendar button and the full week-by-week planA plan to your exam date Set your date and get a week-by-week plan you can add to your calendar in one tap.
    • The readiness bar against its study target markerReadiness by domain Your practice results against a 75% study target, and how they moved this week. A study target, not a pass prediction.
    • Timed exams on the real clock. A live pace line, and Save and exit when you need a break. You pick up with the time you had left.
    • Where your time went. After an open-book timed exam, your slowest questions become a practice set.
    • An exam-day guide. What to bring, the references you may use and the calculator rules.

    See your dashboard first

    Starter dashboard. Day 1 and the parts marked open are free.

    Free. Your dashboard opens as soon as you save.

    • 129 original questions, every one explained. Review every miss after each timed exam. Practice sets show you the ones you haven't seen first.
    • Wrong answer key? We fix it within 2 business days and log it publicly.
    • One payment. No subscription, nothing renews.
    • Didn't pass? Every plan except the 7-day pass has lifetime access. Your retake prep is already paid for.

    Practice drawn to the API 1104 Part C outline: every domain within 1 point of its exam weight

    • Qualification29%
    • Fabrication29%
    • Inspection29%
    • Reports and Records6%
    • Materials and Design6%
    See the numbers

    Each domain's weight on the API 1104 Part C outline, as our timed exams draw it, beside its share of the 129-question bank.

    DomainOutlineBank
    Qualification29%30%
    Fabrication29%29%
    Inspection29%28%
    Reports and Records6%6%
    Materials and Design6%6%

    Instant access. Everything in the plan you choose opens as soon as checkout completes.

    The free check uses the same question style and explanations as the course.

    See the teaching before you buyRead a complete lesson from the course, “How API 1104 is organized, and production welding”, and try a short practice set with full explanations. Free, no signup.

    Read the free lesson

    What the course covers

    3 modules, mapped to the task numbers in American Welding Society's published Part C (API 1104) content outline.

    1. How API 1104 is organized, and production welding (Outline topics C.2.1 to C.2.3, C.5.1)
      Finding your way around API 1104 · Materials, filler metal and joint preparation · Production welding practice · Repair and removal of defects
    2. Procedure and welder qualification under API 1104 (Outline topics C.1.1 to C.1.3)
      Procedure specification and essential variables · Test welds and destructive tests · Single and multiple welder qualification
    3. Inspection, acceptance standards and records on pipelines (Outline topics C.3.1, C.3.2, C.4.1)
      Inspection methods and who may inspect · Acceptance standards for each NDT method · Records and reports

    Questions

    When do I get access?

    Straight away. Checkout takes you to your course, and the receipt email has the same link.

    How do I get back into my course?

    Use the link in your receipt email. If you can't find it, enter your email on the course page and we resend it to the address on your order.

    Is 129 questions enough?

    Each one comes with a worked explanation and its reference. You also get 9 end-of-module checks and 16 code-finding drills. Today's 10 and your missed set bring your misses back on later days, so you work the bank instead of reading it once.

    Can I get a refund?

    Eligibility depends on your plan, when you request a refund and your paid use. See the refund terms for the conditions and exceptions.

    How long do I keep access?

    Lifetime access: your access has no end date. Updates are included, so if American Welding Society moves this exam to a newer code edition while you have access, your course moves with it. The 7-day pass is the exception. 7-day pass: access ends 7 days after payment, to the minute. It does not renew and is not a subscription. A timed practice exam started before then can still be finished.

    If I buy the 7-day pass now, is its price taken off a bigger plan later?

    No. Each plan is a separate purchase at its listed price, and the $29 paid for the 7-day pass is not credited toward another plan. With more than a week before your exam, a full plan is the better buy.

    More questions (12)
    Are the questions copied from the exam?

    No. Every question is original and written to American Welding Society's published content outline. Exam content is confidential and we never use it. We are not affiliated with or endorsed by AWS, ICC or AISC.

    How are the questions written?

    In our own words, to AWS's current published outline. See how many questions cover each domain.

    Do I need my own copy of AWS D1.1?

    For Part C, no. AWS provides D1.1:2025 on screen as a PDF, so you do not need a printed copy. The course cites sections by number so you practice finding them, and we never reproduce the code's text. Parts A and B need no copy: Part A is closed book and Part B gives you its Book of Specifications.

    What is the Part B task?

    You judge weld replicas with a gauge kit against a specification, the AWS Book of Specifications. That is the task our Part B course trains.

    In what order do I take the three parts?

    Part B comes first. You book it with your application, at an AWS test site, in one of three fixed daily groups that check in at about 7:00 a.m., 10:45 a.m. or 2:45 p.m. Late arrivals are not moved to another group. About 4 to 6 weeks after you apply, AWS emails a confirmation letter with the eligibility codes you use to book Parts A and C at Prometric.

    What score do I need to pass?

    AWS requires 72% on each part and 72% overall, the average of the three parts. Scores are rounded down to the nearest whole percent.

    What if I need a retest?

    Your access has no end date, so your course, your scores and your missed set are still there. AWS allows up to 3 retests in 3 years from your first test date. The second and third need proof of more training first. A Part C retest uses the same code as your first Part C.

    Why is this so much less than a seminar?

    We teach online, so there is no classroom, travel or time off work. You get lessons, drills and timed exams on your phone or computer, and they stay yours.

    What does the CWI exam fee cover?

    AWS prices members and non-members separately. The non-member price includes a 3-year AWS membership. The all-parts fee also includes the Prometric seat fees, $60 each for Parts A and C.

    Can my employer pay?

    Yes. Pay at checkout and we email a receipt you can expense, or download a reimbursement request to send your manager.

    Is Tack AI?

    Yes. Tack is an AI study assistant, not a person or an instructor. Check important details against your lessons and references.

    Can you promise I will pass?

    No, and nobody honest can. We promise everything listed in your plan, and a fix within 2 business days for any wrong answer key.

    Employer paying?

    Many employers fund API 1104 Part C prep. Generate a reimbursement request PDF to send to your manager. Buying for a crew? Request a quote