CWI Exam Study Path — Free D1.1 Study Tools by Topic
This free study path organizes our calculators, Q&A, and symbol references into six high-yield CWI exam topics. Work through preheat, filler metal, symbols, joints, positions, and heat input in order, with a D1.1-grounded answer from Flux waiting at every step.
New to the exam structure? Start with the CWI Exam Prep guide for the Part A / B / C breakdown, then come back here to drill the high-yield D1.1 topics below. These six are the topics that recur across the exam — not an official Part B outline, just where the code-application questions cluster.
Preheat
Preheat category, minimum preheat and interpass temperature, and the carbon-equivalent logic behind them. The most-referenced D1.1 study area for code-application questions.
- Preheat Calculator — look up minimum preheat by steel and thickness
- D1.1 Preheat Table Explained — how the categories are read
- Carbon Equivalent Calculator — the chemistry behind the category
Filler Metal
Matching-strength filler metal selection — which electrode classifications pair with which base-metal group. A frequent code-navigation target on the exam.
- AWS A5 Filler Metals — the classification system
- ER80 vs ER90 & Shielding Gas — strength matching in practice
Symbols
Reading AWS A2.4 welding symbols — arrow side versus other side, the reference line, and the tail. Symbol questions appear across all three exam parts and are the fastest points to bank.
- Weld Symbol Chart — every A2.4 symbol on one page
- How to Read Weld Symbols — the reading method
- Welding Symbol Q&A — common symbol questions answered
Joints
Joint types and weld sizing — CJP versus PJP groove welds, minimum fillet sizes, and prequalified joint details. Where drawing-reading and acceptance-criteria questions converge.
- CJP Weld Guide — complete joint penetration explained
- Fillet Weld Size — minimum sizes by thickness
- Prequalified WPS — prequalified joint details
Positions
Welding positions and what a given test qualifies. The 1G–4G / 1F–4F system and the position ranges a plate test earns a welder under Clause 6.
- Welder Qualification Test — Clause 6 position-qualification ranges
Heat Input
Heat input calculation and interpass-temperature limits — the math Part A tests and the WPS limits Part C references.
- Heat Input Calculator — the Part A heat-input formula
- Interpass Temperature — why it matters and how it is controlled
- Maximum Interpass Temperature — the upper limit and where it applies
Once a topic clicks, prove it. These diagnostics and question banks map back to the six topics above.
- CWI Practice Test — 198 questions across 18 exam categories
- CWI Readiness Check — 15-question per-topic weakness report
- 2-Minute Quick Diagnostic — 7-question readiness check, no signup
- D1.1 Code-Application Questions — Part C-style code navigation
- Welding Q&A Hub — browse answered questions by topic
Reference data from AWS D1.1/D1.1M:2025. Not affiliated with AWS.