ITI/NCVT Welder (Fab & Fit) (AITT Theory) study guide
ITI/NCVT Welder (Fab & Fit) (AITT Theory) · Work through your exam, one topic at a time.
The ITI/NCVT Welder (Fabrication & Fitting) All India Trade Test is the theory examination taken by trainees who have completed the two-year ITI trade course in welding under the NCVT framework. It is intended for apprentices and ITI trainees who want a nationally recognised trade qualification for employment in fabrication shops, structural steelwork, pressure-vessel work, shipbuilding, railways, and general engineering maintenance. The ITI/NCVT Welder (Fab & Fit) (AITT Theory) study guide has 13 sections and about 4,802 words.
01Safety, Health and Environment in Welding Workshop
Hazard recognition, PPE selection by process and current, statutory limits on gas and electrical equipment, and emergency response. Questions are scenario-based rather than definitional.
417 words, about 2 min02Engineering Drawing
Reading orthographic views, identifying line types and their meaning, applying dimensioning rules, and calculating limits and fits from toleranced sizes. First-angle projection is standard Indian workshop practice (BIS drawing practice, SP 46): the object lies between the observer and the plane, so the top view is drawn below the front view and the left side view on the right .
351 words, about 2 min03Reading of Weld Symbols and Fit-up Layout
Decoding a welding symbol into a real joint preparation, and the marking and fit-up that turns that symbol into an aligned, correctly gapped assembly. Arrow line pointing to the joint, reference line, identification line, tail (process or specification), elementary symbol on the reference line, plus size, length and pitch dimensions.
396 words, about 2 min04Materials, Ferrous and Non-Ferrous Metals, and Heat Effects of Welding
Carbon equivalent and weldability, alloy behaviour, non-ferrous filler selection, and how the thermal cycle changes the heat-affected zone. As carbon and manganese rise, hardenability rises and weldability falls.
347 words, about 2 min05Oxy-Acetylene Gas Welding, Cutting and Brazing
Flame adjustment and identification, cutting procedure and parameters, brazing versus soldering, and safe handling of gas equipment. Neutral is roughly 1:1 oxygen to acetylene, about 3200 °C, with a sharply defined rounded white inner cone.
382 words, about 2 min06Manual Metal Arc Welding (SMAW): Power Sources, Electrodes and Techniques
Power-source characteristics, duty cycle and derating, electrode classification and storage, polarity choice, arc blow, and technique for each position. SMAW needs a constant-current (drooping) characteristic so that arc-length variation changes current only slightly.
355 words, about 2 min07Gas Metal Arc Welding (MIG/MAG) and Flux Cored Arc Welding
Transfer modes, shielding-gas selection, polarity, parameter relationships, deposition rate, and where FCAW beats GMAW. Short-circuiting (low current, CO2-rich gas, thin sheet, high spatter), globular (unstable, avoid), spray (argon-rich gas and current above the transition value, high deposition, low spatter), and pulsed spray which gives spray-like transfer at lower average current.
319 words, about 2 min08Gas Tungsten Arc Welding (TIG) and Allied Processes
Polarity and electrode selection by material, shielding practice, parameters, and awareness of allied processes. DCEN for carbon steel, stainless, and most metals - it concentrates heat in the work and spares the tungsten.
358 words, about 2 min09Weld Joints, Positions, Distortion and Residual Stress Control
Joint and weld taxonomy, position designations, distortion mechanisms, and the sequence and technique used to control shrinkage and residual stress. Five joint types - butt, lap, T, corner, edge.
349 words, about 2 min10Welding Defects, Inspection and Testing of Welds
Defect naming, cause tracing, and selecting the correct inspection method for the defect type and location. Porosity, slag inclusion, incomplete fusion, incomplete penetration, undercut, overlap, spatter, burn-through, misalignment, arc strike, and cracks (hot, cold/hydrogen, lamellar tearing).
382 words, about 2 min11Fabrication, Fitting, Marking, Shearing, Bending and Pipe/Tube Work
Marking and measuring technique, blank-length calculations for bends, shearing clearance, and pipe layout including offsets and mitres. Marking and checking.
393 words, about 2 min12Workshop Calculation and Science
Numeric work applied to real welding jobs: heat input, weld-metal weight, stress and strain, thermal expansion, and simple electrical relationships. H = (60 × V × I) / (1000 × v) kJ/mm, with V in volts, I in amperes, v in mm/min.
378 words, about 2 min13Employability Skills and Industrial Practices
Workplace discipline, quality systems, documentation that a welder must handle, cost estimation, and communication skills for interview and shop-floor work. Seiri (sort), Seiton (systematise), Seiso (sweep), Seiketsu (standardise), Shitsuke (self-discipline).
375 words, about 2 min