ITI/NCVT Sheet Metal Worker (AITT Theory) study guide
ITI/NCVT Sheet Metal Worker (AITT Theory) · Work through your exam, one topic at a time.
The ITI/NCVT Sheet Metal Worker trade theory paper is the written All India Trade Test (AITT) that apprentices and institutional trainees in the Sheet Metal Worker trade sit at the end of their training. It tests whether you can think like a fabricator: read a drawing, develop a true-length pattern, choose a joint, set a machine, and work safely. The ITI/NCVT Sheet Metal Worker (AITT Theory) study guide has 13 sections and about 3,893 words.
01Trade Safety, Occupational Health and Environment
This domain tests how well you recognise hazards in a sheet metal shop and apply controls before an injury occurs. Expect questions on PPE, machine guarding, fire fighting, electrical safety, housekeeping, waste disposal and occupational disease.
347 words, about 2 min02Engineering Drawing
This domain checks whether you can read a mechanical drawing correctly: projections, line conventions, dimensions, sections, tolerances and surface finish. The exam often gives a simple part and asks for the missing view, a dimension interpretation or a symbol meaning.
327 words, about 2 min03Sketching and Reading of Sheet Metal Drawings
This domain tests freehand sketching and the special conventions of sheet metal flat-pattern drawings. You must recognise bend lines, bend direction, bend radius, seam allowances, notches and the difference between a finished view and a developed blank.
317 words, about 2 min04Materials and Hand Tools for Sheet Metal Work
This domain covers the common sheet metals, their properties and the hand tools used to cut, shape and finish them. Questions often ask you to select a material or tool for a stated job and to interpret standard wire gauge numbers.
368 words, about 2 min05Marking, Measuring and Layout Development
This domain tests accurate marking from a datum, correct use of measuring instruments and the layout allowances needed before cutting. The exam expects you to calculate a developed length and to choose the right measuring tool for a tolerance.
322 words, about 2 min06Cutting, Shearing and Hand Forming Operations
This domain covers separating sheet by shearing, snips, chisels, sawing and nibbling, and then forming it by hand. Expect questions on blade clearance, shear force, edge quality and the correct sequence for hand forming.
289 words, about 1 min07Edges, Seams, Joints and Fastening
This domain tests how sheet edges are finished and how sheets are joined without welding. You must know hemming, wiring, seam types, joint types and the allowances needed for each.
285 words, about 1 min08Bending, Folding, Rolling and Press Operations
This domain tests plastic deformation of sheet: bend allowance, bend deduction, springback, minimum bend radius, rolling and press-brake work. Numerical questions on bend allowance are common.
287 words, about 1 min09Pattern Development and Surface Layout
This domain tests how a three-dimensional sheet metal article is opened out into a flat pattern. You must choose the development method and calculate true lengths, stretch-outs and seam allowances.
285 words, about 1 min10Welding, Brazing, Soldering and Riveting for Sheet Metal
This domain covers the joining processes used alongside mechanical fastening. Expect questions on process selection, temperature ranges, fluxes, rivet size and distortion control.
275 words, about 1 min11Machines, Equipment and Power Tools
This domain tests safe and correct use of shearing machines, press brakes, slip rolls, drills, grinders, nibblers and power shears. Questions often combine a calculation with a safety decision.
266 words, about 1 min12Estimation, Costing and Material Calculation
This domain tests material weight, cost build-up and estimate types. You must convert dimensions consistently and include wastage, labour, overhead and profit.
235 words, about 1 min13Employability Skills and Basic Computer Literacy
This domain tests the non-technical skills that make a tradesperson employable and safe in a digital workplace: communication, teamwork, resume and interview readiness, basic file management, email, spreadsheets and cyber safety. Communication includes listening, clear speech, accurate written notes and reporting a hazard or defect to a supervisor.
290 words, about 1 min