GTAW NC II study guide
GTAW NC II · Work through your exam, one topic at a time.
Gas Tungsten Arc Welding (GTAW) NC II is a Philippine technical-vocational qualification for welders who produce precision TIG welds on carbon steel, stainless steel, aluminum, and other metals. It is typically pursued by entry-level welders, by SMAW or GMAW welders adding a precision process, and by workers in food, dairy, pharmaceutical, and fabrication shops where clean, contamination-free welds matter. The GTAW NC II study guide has 8 sections and about 2,872 words.
01Workplace Safety, Health, and Environment (OHS) Compliance
This domain tests hazard recognition and control for GTAW in shop and field work: PPE, arc radiation, fumes, shielding-gas displacement, cylinder handling, electrical safety, hot work, and emergency response. Complete a risk assessment and hot work permit before striking an arc; clear combustibles, assign a fire watch, and check ventilation.
353 words, about 2 min02Interpretation of Welding Drawings, Symbols, and Specifications
This domain tests reading fabrication and welding documents: drawing views, dimensions, welding symbols, joint details, WPS variables, and specification requirements. Read the title block, revision, units, scale, notes, bill of materials, and weld map before looking at individual welds.
357 words, about 2 min03Preparation of Materials, Tools, Equipment, and Work Area
This domain tests readiness before welding: material identification, joint preparation, cleaning, fit-up, tungsten preparation, equipment checks, and work-area control. Verify base metal against the drawing and material certificate, including grade and heat number.
338 words, about 2 min04GTAW Process Fundamentals, Power Sources, and Parameter Selection
This domain tests how GTAW works and how to set polarity, current, gas, tungsten, and travel variables for a sound weld. GTAW uses a nonconsumable tungsten electrode and an inert shielding gas, usually argon.
375 words, about 2 min05GTAW Welding of Carbon Steel and Stainless Steel (Plate and Pipe)
This domain tests technique and control for carbon steel and stainless steel plate and pipe, including root passes, fill passes, caps, and heat control. For carbon steel, use DCEN, clean joint faces, and ER70S-2 or ER70S-6 filler as specified.
371 words, about 2 min06GTAW Welding of Aluminum and Other Non-Ferrous Metals
This domain tests GTAW of aluminum and other non-ferrous metals, focusing on oxide removal, AC settings, filler selection, and heat control. Aluminum forms a refractory oxide that melts at a much higher temperature than the metal.
364 words, about 2 min07Weld Inspection, Testing, and Defect Identification/Correction
This domain tests inspection across the weld cycle and the identification and correction of common GTAW defects. Inspect before welding: material identity, joint fit-up, cleanliness, WPS availability, filler, and equipment.
359 words, about 2 min08Documentation, Recording, and Reporting of Welding Activities
This domain tests the records that prove a weld was made to specification and can be traced: WPS, welder qualification, material and filler traceability, inspection records, and final reporting. Use the approved WPS and confirm the welder is qualified for the process, position, thickness, and joint.
355 words, about 2 min