Apps / CWI Prep
CWI Prep
IndustrialLive on App StoreCWI Prep is an iOS and Android app with 450+ digital supplemental questions for Part A fundamentals, Part B concepts, and Part C code navigation, plus a Weld Symbol Decoder. It works offline; purchase terms are set by the app store. Hands-on Part B activities require AWS-provided equipment and are not reproduced by digital practice.
Available on iPhone and Android · Free to download · optional in-app purchases; check your store for current local terms
Official-source boundary
Use digital practice for the parts it can support
AWS currently lists 150 questions for Part A, 46 for the hands-on Part B, and 50–65 for the open-book Part C, with at least 72% required on each part. VoltExam is independent supplemental practice; it does not reproduce AWS-provided Part B equipment, issue certification, or predict an official result.
AWS boundary last reviewed 2026-10-16; public native purchase terms rechecked for this page on 2026-10-19.
Why CWI Prep?
Weld Symbol Decoder
Weld Symbol Decoder — build any AWS A2.4 symbol and get an instant plain-English interpretation
493+ Practice Questions
493 digital supplemental questions for Part A, Part B concepts, and Part C code navigation
Works Offline
Full offline access — study in the shop, field, or job trailer without Wi-Fi
Progress Tracking
Per-topic progress tracking for practice, not an AWS score or pass prediction
How It Works
Step 01
Download Free
Free to download on iPhone and Android. Optional purchases use the terms shown in your store.
Step 02
Practice Daily
Built-in Weld Symbol Decoder plus full practice questions — not just quizzes.
Step 03
Unlock Full Practice
Choose only from the purchase options and terms displayed by your app store.
Native app purchase options
Apple App Store
The US listing currently shows monthly, annual, and lifetime in-app purchase options. Open the App Store for the current price, trial eligibility, renewal terms, and availability shown for your region and account.
Google Play
Google Play lists the app as free to install with in-app purchases. Review the purchase terms and final local price in Google Play before confirming.
Native app purchases are separate from VoltExam web access. CWI question inventory and purchase options can differ by platform and version; check the selected store and the separate web study destination for their current content and terms.
Frequently Asked Questions
What is on the AWS CWI exam?
AWS currently describes three parts: Part A Fundamentals has 150 questions; Part B Practical has 46 questions tied to hands-on activities with AWS-provided equipment; and Part C is an open-book code exam with 50–65 questions based on the candidate's approved code. AWS requires at least 72% on each part.
How hard is the CWI exam?
AWS's current CWI program page does not publish a first-time pass rate or rank one part as the hardest. Part B is a hands-on assessment, so digital questions can support concept review but cannot replace practice with physical specimens, gauges, tools, and the current AWS Book of Specifications.
How many questions are on the CWI exam?
AWS currently lists 150 questions for Part A, 46 questions for Part B, and 50–65 questions for Part C. Confirm the current schedule, selected code and permitted edition in the AWS CWI Examination User Guide, Official Exam Reference Guide and your candidate records.
Ready to Pass?
Free to download on iPhone and Android. Review the current purchase options in your store.
Free Web Tools
Free CWI Prep Practice Questions
Browse topic-by-topic in your browser — no app required
Free Study Hub — Web App
Read the guide, memorize with flashcards, and test yourself — all in your browser, no download required.
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