10.1 Part A (Fundamentals) Exam Strategies
Key Takeaways
- Part A: 150 scored questions, closed book, 135 minutes — approximately 49 seconds per question
- Passing score is 72% — you can miss 42 questions and still pass
- Highest-yield topics: Definitions (12%), Welding Processes (12%), Symbols (10%), Weld Examination (10%)
- Use flashcards for definitions, practice drawing welding symbols, work math problems
- Do not spend more than 60 seconds on any question in the first pass — mark and return
- Read all four options before selecting — the second-best answer is designed as a trap
Last updated: March 2026
10.1 Part A (Fundamentals) Exam Strategies
Part A is the largest and most challenging section of the CWI exam: 150 scored questions, closed book, 135 minutes. Here are proven strategies for maximizing your score.
Time Management
| Metric | Value |
|---|---|
| Scored questions | 150 |
| Total questions | 165 (15 unscored pretest) |
| Time limit | 135 minutes |
| Average time per question | ~49 seconds |
| Passing score | 72% (108 of 150) |
Strategy: Do not spend more than 60 seconds on any question in the first pass. Mark difficult questions and return to them after completing easier ones. You need 108 correct out of 150 — you can miss 42 questions and still pass.
Topic Weight Prioritization
Focus your study time on the highest-weighted topics for maximum return on investment:
| Priority | Topic | Weight | Strategy |
|---|---|---|---|
| High | Definitions & Terminology | 12% | Memorize precise definitions — many questions hinge on exact wording |
| High | Welding Processes | 12% | Know all five major processes cold — equipment, parameters, advantages/limitations |
| High | Welding Symbols | 10% | Practice reading symbols until arrow-side/other-side is automatic |
| High | Weld Examination | 10% | Know VT requirements, discontinuity identification, acceptance criteria |
| Medium | Welding Performance | 9% | Position qualification, essential variables, 6-month rule |
| Medium | NDE Methods | 8% | Know capabilities/limitations of each method, what each detects |
| Medium | Heat Control & Metallurgy | 6% | Iron-carbon diagram, HAZ, HIC, preheat, CE formula |
| Medium | Calculations | 6% | Practice heat input, throat calculation, deposition efficiency formulas |
| Lower | Duties & Responsibilities | 4% | Before/during/after inspection duties |
| Lower | Destructive Tests | 3% | Tensile, bend, impact, hardness — acceptance criteria |
| Lower | Cutting Processes | 2% | OFC, PAC, CAC-A basics |
Key Study Tips for Part A
- Use flashcards for definitions and terminology — this is the single highest-yield study activity
- Draw welding symbols by hand — do not just read about them; actively practice creating and reading them
- Work practice problems for math — heat input, throat calculation, electrode consumption
- Create comparison tables — compare welding processes side by side (SMAW vs. GMAW vs. FCAW, etc.)
- Study electrode classifications — E7018, ER70S-6, E71T-1 — know what each character means
- Understand NDE capabilities — create a matrix: VT vs. PT vs. MT vs. UT vs. RT — what each detects
- Focus on HIC prevention — the three required conditions and how to eliminate each one
- Know the CWI's role — what inspectors do before, during, and after welding
Common Part A Traps
| Trap | Avoidance |
|---|---|
| Similar-sounding options | Read ALL four options before selecting — the second-best answer is designed to trap you |
| "Which is MOST correct" | When multiple answers seem right, choose the most complete or most specific answer |
| Absolute words | Beware of "always," "never," "only" — they are often incorrect; "usually" or "typically" are safer |
| Changed terminology | Know both old and new terms (e.g., DCEP = DCRP, DCEN = DCSP) |
| Unit mismatches | Check units carefully — ksi vs. psi, °F vs. °C, inches vs. mm |
Test Your Knowledge
On Part A of the CWI exam, which two topics together account for approximately 24% of the questions?
A
B
C
D
Test Your Knowledge
How many questions can you answer incorrectly on Part A and still pass?
A
B
C
D