ESE ME Prelims case studies
ESE ME Prelims · Put your knowledge to work in context.
The Engineering Services Examination (Preliminary) in Mechanical Engineering is a UPSC-conducted screening stage for engineering graduates aiming at Group A and Group B technical posts in the central government. The Commission lists it among its active examinations on upsc.gov.in, but the official pages give no current figures for paper structure, marks, duration, cut-offs or fees, so candidates must read the annually issued examination notice before planning. The ESE ME Prelims case studies are 5 cases and about 1,801 words.
1Premium-Efficiency Motor Purchase Under Budget and Gift Pressure
You are the assistant manager (mechanical) of a publicly owned process plant. A vendor has quoted an IE3 premium-efficiency 75 kW induction motor to replace an existing IE2 motor.
442 words, about 2 min2Pump Cavitation Margin at Low Sump Level
A centrifugal pump draws 40 L/s of water at 35°C from an open sump and delivers it to a cooling tower. The pump manufacturer's NPSHr at this duty is 4.5 m.
377 words, about 2 min3Diesel Exhaust ORC Retrofit with Backpressure Penalty
A 1.2 MW diesel generator at a textile mill runs 7,000 h/year. Its exhaust is 3.8 kg/s at 430°C; take cp = 1.05 kJ/kg·K.
357 words, about 2 min4Oil-Cooler Fouling: Clean, Add Area, or Increase Water Flow
A counterflow shell-and-tube oil cooler must cool 5.0 kg/s of oil (cp = 2.10 kJ/kg·K) from 120°C to 70°C using 6.0 kg/s of cooling water (cp = 4.18 kJ/kg·K) entering at 30°C. The installed area is 30 m² and the clean overall heat-transfer coefficient is 450 W/m²·K.
295 words, about 1 min5Taylor Tool Life Versus Delivery Deadline
A CNC lathe must turn 300 identical mild-steel shafts from 200 mm diameter bar to 180 mm diameter over a 300 mm length in one pass. Feed is 0.25 mm/rev.
330 words, about 2 min