Tamil Nadu HSE Second Year Basic Mechanical Engineering case studies
Tamil Nadu HSE Second Year Basic Mechanical Engineering · Put your knowledge to work in context.
Basic Mechanical Engineering is the vocational-stream subject taken in the second year of the Tamil Nadu Higher Secondary Certificate (Class XII). It suits students heading for polytechnic diploma programmes, apprenticeships, or shop-floor and maintenance work, and it treats mechanical engineering as a practical trade rather than an abstract science. The Tamil Nadu HSE Second Year Basic Mechanical Engineering case studies are 5 cases and about 4,658 words.
1Perforated pump casing on a brackish-water cooling line
A seafood processing plant on the Tamil Nadu coast runs a 37 kW, 1450 rpm centrifugal pump delivering 90 m³/h of brackish cooling water at about 18,000 ppm chloride, with sand drawn in from an open sump. The casing is grey cast iron FG 200.
951 words, about 5 min2Tie bar that 'did not break' but stretched too far
A roof truss fabricated on site uses a 1.20 m long, 20 mm diameter mild steel tie bar with forged eyes at both ends. The design data are: working tensile load 60 kN, yield strength of the supplied bar 250 MPa, elastic modulus 200 GPa, and a drawing requirement of factor of safety 2.5 on yield.
819 words, about 4 min3Turning a batch of EN8 shafts against a shift deadline
A batch of 200 EN8 shafts must be turned from Ø50 mm bar to Ø44 mm over a length of 300 mm on a centre lathe. Surface finish must be Ra 1.6 µm and the diameter tolerance is ±0.05 mm.
958 words, about 5 min4Diesel genset smoking black at part load
A four-cylinder, four-stroke diesel genset drives a garment factory load. Bore 100 mm, stroke 115 mm, compression ratio 17.5, rated output 60 kW at 1500 rpm, specific fuel consumption 230 g/kWh, calorific value of the diesel 42 MJ/kg.
990 words, about 5 min5Micrometer readings on Ø25 pins in a 34 °C shop
A workshop inspects a batch of 500 ground steel pins, nominal Ø25.000 mm with tolerance +0.000/−0.040 mm, so the limits are 24.960 mm and 25.000 mm. The inspector uses an outside micrometer of 0–25 mm range with 0.01 mm graduation.
940 words, about 5 min