ITI Mechanic Auto Body Repair (AITT Theory) study guide
ITI Mechanic Auto Body Repair (AITT Theory) · Work through your exam, one topic at a time.
The All India Trade Test (AITT) is the national assessment that ITI trainees sit at the end of their trade course, and the Mechanic Auto Body Repair trade theory paper is one component of it; clearing the AITT requirements in full is what leads to the National Trade Certificate. The theory paper asks whether you understand the work you have been doing in the shop - why a panel is straightened with a hammer and dolly rather than a slide hammer, why MIG on 0.8 mm steel needs a particular wire and gas setting, why a basecoat blistered under a topcoat. The ITI Mechanic Auto Body Repair (AITT Theory) study guide has 12 sections and about 3,750 words.
01Occupational Safety, Health and Environment
This domain tests hazard recognition and control in a body shop: PPE selection, ventilation, fire prevention, electrical and vehicle hazards, and waste handling. The exam favours practical control measures over slogans.
340 words, about 2 min02Hand Tools
This domain examines hand-tool selection, inspection, safe use and maintenance in body repair. Questions often describe a fastener or access problem and ask for the correct tool and technique.
321 words, about 2 min03Measuring and Marking Instruments
This domain tests measurement of panels, gaps, frame dimensions and surface condition. The exam expects correct instrument choice, zeroing, datum use and interpretation of tolerances.
332 words, about 2 min04Sheet Metal Work and Body Panel Fabrication
This domain covers metal properties, forming, cutting, flanging, patch fabrication and corrosion protection. Exam items often ask which process preserves strength or prevents future rust.
321 words, about 2 min05Welding, Brazing and Joining Processes
This domain tests process selection, setup, joint preparation and defect avoidance for collision repair. It includes MIG/MAG, TIG, squeeze-type resistance spot welding, brazing, soldering and structural adhesive bonding.
320 words, about 2 min06Chassis, Body Construction and Frame Alignment
This domain tests body construction types, structural measurement, pulling and sectioning rules. The exam expects you to distinguish cosmetic alignment from structural correction.
307 words, about 2 min07Panel Beating, Dent Removal and Body Repair Techniques
This domain tests metal finishing: hammer and dolly work, shrinking, filing, filler application and paint preparation. The exam looks for a sequence that restores shape without overstretching or trapping defects.
307 words, about 2 min08Plastic, Fibreglass and Composite Panel Repair
This domain tests identification of plastics and composites, repair method selection and adhesion. Exam questions often ask whether a part can be welded, bonded or must be replaced.
307 words, about 2 min09Vehicle Body Painting and Refinishing
This domain tests surface preparation, primer and topcoat systems, colour matching, blending, spray technique and defect correction. The exam favours process control over speed.
316 words, about 2 min10Trimming, Upholstery, Glass and Weatherstrip Fitting
This domain covers interior trim, seat upholstery, headliners, glass installation and weather seals. The exam tests materials, fasteners, sealing and post-installation requirements.
288 words, about 1 min11Body Electricals and Vehicle Accessories
This domain tests 12 V electrical diagnosis, wiring repair, accessory installation and safety-system precautions. The exam expects measurement-based diagnosis rather than parts swapping.
303 words, about 2 min12Estimation, Job Documentation and Customer Handling
This domain tests repair estimating, labour and materials calculation, supplements, authorisation and customer communication. The exam expects transparent documentation and correct sequence.
288 words, about 1 min