MPPSC SES Mechanical case studies
MPPSC SES Mechanical · Put your knowledge to work in context.
The MPPSC State Engineering Service Examination (Mechanical Engineering) is a Madhya Pradesh Public Service Commission recruitment test used to shortlist candidates for state government engineering posts, typically Assistant Engineer and equivalent technical roles in departments such as PWD, Water Resources, and energy utilities. It is intended for mechanical engineering graduates who want a stable public-sector technical career in Madhya Pradesh rather than private industry or central services. The MPPSC SES Mechanical case studies are 5 cases and about 3,380 words.
1Loose Bolts on a Reversing Bracket
A 6 kN vertical service load, reversing between zero and full value, is carried 150 mm from the centroid of a bracket fixed to a machine frame by four M12 grade 8.8 bolts on an 80 mm × 80 mm square pattern. The bracket face is painted, and the bolts were tightened with a torque wrench of unknown calibration; the maintenance log records only “tightened firmly”.
694 words, about 3 min2Vibration After a VFD Retrofit
After a 22 kW induction motor driving a centrifugal fan was fitted with a variable-frequency drive, bearing-housing vibration rose from 2.1 mm/s RMS to 11 mm/s RMS, dominated by 1× running speed. The fan runs at 1,470 rpm.
655 words, about 3 min3Cavitation in a Hot-Well Pump
A centrifugal pump rated 60 m³/h at 45 m head draws from an open concrete sump through a 100 mm line with a foot valve and two bends. The water is process return at 80 °C, with vapour pressure 47.4 kPa absolute and density 971 kg/m³.
613 words, about 3 min4Compressor Heat Recovery Payback
A plant is considering heat recovery from a 75 kW oil-injected screw compressor. The vendor states: “75 kW × 80% recoverable × 6,000 h = 3,60,000 kWh per year, worth about ₹24 lakh at current LPG cost, so the ₹6.5 lakh unit pays back in under four months.” Plant records show the compressor averages 68 kW input over 5,000 h/yr at 70% load.
712 words, about 4 min5Capability and Calibration Pressure on a Shaft Line
A CNC turning cell machines a hydraulic shaft to 40.000/39.975 mm. Over the last 200 pieces the mean is 39.993 mm with σ = 0.0030 mm, and the drawing requires Cpk ≥ 1.33.
706 words, about 4 min