10.2 Part C (Code Application) Exam Strategies
Key Takeaways
- Part B (Practical) and Part C (Code) are both open book and both scored at 72% — speed and navigation, not memorization, win them
- Part B uses molded replica specimens plus the inspection kit (fillet, Bridge-Cam, V-WAC, hi-lo gauges) judged against the Book of Specifications and Book of Exhibits — 46 questions in 2 hours
- Part C tests applying a code (AWS D1.1, API 1104, or ASME Section IX) to look-up scenarios; tab every key table and figure
- On Part B, measure exactly (leg, throat, reinforcement, undercut, convexity) and accept/reject ONLY against the Book of Specifications, never memory
- On Part C, identify the clause/table first, navigate by tab, read the actual code text, and trust it — do not assume
- Practice both with a timer: find any major reference or take any gauge reading in under 30 seconds
Part B (Practical) — Gauges, Replicas, and the Book of Specs
Part B is the hands-on, open-book practical part: 46 questions in 2 hours, passed at 72%. AWS provides everything — you do not bring tools. You inspect molded plastic replica weldments (groove plate, fillet/T-joint, and a pipe specimen) using a calibrated inspection tool kit, then accept or reject each feature strictly against the Book of Specifications, with supporting documents in the Book of Exhibits. The whole part is a discipline test: measure precisely, then compare to the written spec — never to memory or field habit.
The inspection kit and what each tool reads:
| Tool | Measures |
|---|---|
| Fillet weld gauge | Leg size and throat of fillet welds |
| Bridge-Cam gauge | Reinforcement, fillet leg, undercut depth, angle of preparation |
| V-WAC (undercut) gauge | Undercut depth and surface porosity sizing |
| Hi-Lo gauge | Internal misalignment (high-low) on pipe |
| Dial caliper / ruler / protractor | Lengths, thickness, groove angle |
| Magnifier, mirror, flashlight | Surface-flaw detection (cracks, porosity, overlap, IF) |
What you measure and judge per replica:
| Feature | Tool | Accept/reject basis |
|---|---|---|
| Fillet leg & throat | Fillet/Bridge-Cam | Book of Specifications min size |
| Reinforcement | Bridge-Cam | Max height per spec |
| Undercut | V-WAC/Bridge-Cam | Depth limit per spec |
| Convexity/concavity | Bridge-Cam | Profile limits |
| Cracks, porosity, overlap, IF | Visual + magnifier | Spec acceptance limits |
Part B traps: wrong gauge for the feature; reading the gauge from the wrong reference face; and — most common — judging by memory instead of the Book of Specifications. Always cite the spec line. Re-zero gauges, and report measured values to the precision the gauge allows.
Part C (Code Application) — Navigation Over Memory
Part C is open book against a chosen code — most candidates sit AWS D1.1 Structural Welding Code — Steel, but API 1104 (pipelines) and ASME Section IX are options. It is 50 scored questions plus pretest, and 72% passes. Because the code is in front of you, the exam tests how fast and accurately you can find and apply the right clause, table, or figure — not whether you memorized it.
Tab the code before exam day. A consistent color scheme turns a 90-second hunt into a 10-second flip:
| Tab | D1.1 reference | Content |
|---|---|---|
| Red | Table 5.3 | Approved base metals (groups) |
| Blue | Table 5.4 | Matching filler metals |
| Green | Table 5.8 | Minimum preheat / interpass |
| Yellow | Figure 5.1 | Prequalified CJP groove joints |
| Orange | Figure 5.2 | Prequalified PJP groove joints |
| Purple | Table 7.7 | Minimum fillet weld size |
| Pink | Table 8.1 | Visual acceptance criteria |
| Brown | Table 8.2 | UT acceptance criteria |
| Black | Clause 6 | Welder/WPS qualification |
Common Part C question types:
| Type | Approach |
|---|---|
| Table look-up (preheat, fillet size) | Identify metal group, then cross-read thickness row |
| Acceptance criteria | Table 8.1; pick statically vs cyclically loaded column |
| Prequalification check | Verify ALL Clause 5 conditions — one miss = not prequalified |
| Joint detail (root opening, angle) | Figures 5.1/5.2 by joint designation |
| Qualification range | Clause 6 tables — position, thickness, diameter limits |
| Repair/NDE timing | Clause 8 |
Memorize the structure, not the contents: which clause holds qualification, fabrication, and inspection. That mental map is what lets you go straight to the tab.
Open-Book Time Management and Step-by-Step Method
Both open-book parts pass at 72% and both reward a calm, repeatable routine. Time budgets:
| Part | Scored Q | Time | Pace | Pass |
|---|---|---|---|---|
| B (Practical) | 46 | 120 min | ~2.6 min/Q | 72% |
| C (Code) | 50 | ~120 min | ~2.4 min/Q | 72% |
That pace is generous only if your gauges and tabs are second nature. Build the habit now: set a timer and practice taking each gauge reading and finding each major table until both take under 30 seconds.
The six-step look-up loop (apply to every Part C item):
- Read the full question — pin down exactly what value or decision is asked.
- Identify the clause/table/figure needed (this is the make-or-break step).
- Navigate by tab — go straight to the reference.
- Read the actual code text/row — do not assume from memory.
- Match the answer to the code wording exactly.
- Move on — trust the code; do not second-guess.
Part C mistakes to avoid:
| Mistake | Prevention |
|---|---|
| Answering from memory | Always verify in the code, even when sure |
| Static vs cyclic mix-up | Re-read the loading condition before choosing the column |
| Boundary thickness error | Note "up to and including" vs "over" — equal values matter |
| Partial prequalification check | A WPS is prequalified only if EVERY condition is met |
| Time sink | If unfound in ~4 minutes, flag and move on |
Part B/C Readiness Checklist (Last Cram Pass)
- Take leg, throat, reinforcement, and undercut readings on a sample weld with the correct gauge, blind
- Practice accepting/rejecting a feature by citing a specific Book of Specifications line
- Confirm all code tabs are placed and labeled (5.3, 5.4, 5.8, 5.1, 5.2, 7.7, 8.1, 8.2, Clause 6)
- Time yourself finding any major table — target under 30 seconds
- Run the six-step look-up loop on 20 practice code questions
- Verify which code edition the exam allows and tab THAT edition only
- Plan to flag-and-return on any item exceeding ~4 minutes
For the exam: the single highest-payoff prep for both open-book parts is timed repetition — gauge readings for Part B, table navigation for Part C — until accuracy is automatic and speed is no longer a worry.
On Part B (Practical), what is the correct basis for accepting or rejecting a feature you measured on a replica weldment?
Why is fast code navigation the decisive skill on Part C rather than memorization?
Approximately how much time per question do you have on Part C (50 scored questions in about 120 minutes)?