Karnataka SSLC Elements of Mechanical Engineering IV - JTS (KSEAB) case studies
Karnataka SSLC Elements of Mechanical Engineering IV - JTS (KSEAB) · Put your knowledge to work in context.
Elements of Mechanical Engineering IV is a vocational theory subject in the Karnataka SSLC Job Training (JTS) stream, examined by the Karnataka School Examination and Assessment Board (KSEAB). It is written for students who are learning a trade alongside their Class 10 subjects and who need a working, practical understanding of mechanical engineering ideas rather than a full diploma-level treatment. The Karnataka SSLC Elements of Mechanical Engineering IV - JTS (KSEAB) case studies are 5 cases and about 3,692 words.
1Line-shaft flat belt losing speed under full load
A coir-yarn spinning unit runs its main line shaft from a 7.5 kW, 1440 rpm three-phase motor through an open flat-belt drive. The motor pulley is 100 mm diameter, the line-shaft pulley is 400 mm, and the centre distance is 900 mm.
760 words, about 4 min2Repeated 6205 bearing failure on a water pump
A municipal water pumping station has three horizontal centrifugal pumps, each rated 90 m³/h at 45 m head. One pump's drive-end bearing, a single-row deep-groove ball bearing 6205 (25 mm bore × 52 mm outside diameter × 15 mm wide), failed after 900 running hours.
796 words, about 4 min3Fire-tube boiler efficiency and whether to buy an economiser
A textile processing unit runs a two-pass horizontal fire-tube boiler rated at 1.5 tonnes of steam per hour at 8 bar. During a six-hour trial the boiler evaporated 8,100 kg of dry saturated steam at 8 bar from feedwater at 32 °C, using 1,250 kg of washed coal of calorific value 24.5 MJ/kg.
761 words, about 4 min4Diesel genset with black smoke and high fuel consumption
A rice mill runs a three-phase diesel generating set rated 25 kVA, 415 V, 1500 rpm, directly coupled to an alternator of about 90 per cent efficiency. During a four-hour evening shift the set carried an average electrical load of 15 kW at 0.8 power factor.
686 words, about 3 min5Micrometer zero error and an argument over rejected pins
A bicycle-parts job shop must inspect a lot of 500 hardened steel pins, nominal diameter 12.000 mm with a tolerance of ±0.020 mm. The inspector uses a 0-25 mm outside micrometer with 0.01 mm graduations, one division on the thimble.
689 words, about 3 min