Tamil Nadu HSE First Year Basic Mechanical Engineering case studies
Tamil Nadu HSE First Year Basic Mechanical Engineering · Put your knowledge to work in context.
Basic Mechanical Engineering is a first-year subject in the Tamil Nadu Higher Secondary Certificate (HSC) vocational stream, taken alongside general subjects by students who want a practical grounding in workshop technology before moving into polytechnic diploma courses, apprenticeships, or entry-level shop-floor work. It is a school-level vocational subject, not an industrial certification, and completion of the HSC vocational group is what carries value to employers and to higher-secondary-to-diploma pathways. The Tamil Nadu HSE First Year Basic Mechanical Engineering case studies are 5 cases and about 2,790 words.
1Filing a Block to 18.00 ± 0.05 mm: When the High Spot Is Already Undersize
An ITI first-year trainee in a fitting shop is given a mild steel block 100 mm × 60 mm × 20 mm and told to file it to 18.00 ± 0.05 mm thickness, with opposite faces parallel and adjacent faces square within 0.05 mm over 100 mm. He clamps the block with about 8 mm projecting above the vice jaws and starts with a 300 mm bastard file, using crossing strokes at about 30°.
598 words, about 3 min2Blank Size and Leak-Proof Corners for a 200 × 150 × 40 mm GI Tray
A sheet metal shop must make 10 open rectangular trays, inside size 200 mm × 150 mm × 40 mm, from 0.8 mm galvanised iron sheet. The corners are to be notched and folded, and the vertical corner joints must be leak-proof because the trays will hold a water-based cleaning solution.
604 words, about 3 min3Blowholes and a Misrun Rib in a 6 kg Grey Cast Iron Bracket
A foundry pours a grey cast iron bracket weighing 6 kg in a green sand mould. The pattern is a single piece with a 4 mm thick strengthening rib.
525 words, about 3 min4A 500 × 400 mm Welded Angle Frame That Came Out Twisted
A fabricator is making a rectangular frame 500 mm × 400 mm outside, from 25 mm × 25 mm × 3 mm mild steel angle, using a 200 A AC arc welding set, E6013 electrodes of 3.15 mm, at 90 A. The four corners are square butt joints and are welded with a single pass on the outside only.
526 words, about 3 min5A Slipping Flat-Belt Drive That Is Also Running the Machine Too Fast
A small workshop line shaft runs at 1440 rpm from a 3 kW motor through a flat belt. The driven machine needs 360 rpm and the available driven pulley is 300 mm; the centre distance is 1.2 m.
537 words, about 3 min