Maharashtra HSC Mechanical Technology (Vocational) case studies
Maharashtra HSC Mechanical Technology (Vocational) · Put your knowledge to work in context.
The Maharashtra HSC Vocational Mechanical Technology paper is the theory component of a Class XII vocational trade subject examined by the Maharashtra State Board of Secondary and Higher Secondary Education (MSBSHSE). It is built for students who want a recognised higher-secondary qualification alongside a practical, trade-level grounding in mechanical work - typically candidates moving on to a polytechnic diploma, an apprenticeship, or a shop-floor role in machining, fabrication or maintenance. The Maharashtra HSC Mechanical Technology (Vocational) case studies are 5 cases and about 3,455 words.
1Diameter drift and taper on a batch of EN8 pins
A batch of 60 pins, 120 mm long, is being turned from EN8 bright bar on a CNC lathe to Ø25.00/24.95 mm with Ra 1.6 µm on the diameter. The shed has no air conditioning; shop temperature climbs from 26 °C in the morning to 36 °C by mid-afternoon, and the machine gets only a 15-minute warm-up at 1000 rpm before the first cut.
781 words, about 4 min2Micrometer dispute on a ±0.010 mm dowel pin lot
Your company receives 500 hardened ground dowel pins, drawing size Ø12.000 ± 0.010 mm, from a new supplier whose inspection certificate reports every dimension in tolerance. Receiving inspection is done on the shop floor next to a heat-treatment furnace; ambient temperature at the time of checking is 33 °C.
621 words, about 3 min3Blowholes and boss porosity in a grey iron pulley casting
A foundry pours grey cast iron pulley blanks of about 8.2 kg finished weight in green sand moulds on a jolt-squeeze machine. The pattern is a two-part split pattern with the boss in the drag.
720 words, about 4 min4Press ram drifting and cycle slowing after a return-hose change
A 100-tonne hydraulic press used for deep drawing has a 200 mm bore main cylinder, a 300 mm working stroke and a pump delivering 60 L/min at 160 bar. Power-pack oil temperature used to settle at 48 °C but now runs at 68 °C.
691 words, about 3 min5Quoting 300 MS flanges and judging a ₹330 counter-offer
A small job shop near Nashik is quoting to machine MS flanges from black bar. The drawing calls for a Ø150 × 25 mm flange, rough and finish turned on the face and OD, then four Ø14 mm holes drilled on a pitch circle.
642 words, about 3 min