PEC EPE Mechanical case studies
PEC EPE Mechanical · Put your knowledge to work in context.
The Pakistan Engineering Council's Engineering Practice Examination (EPE) in Mechanical Engineering is the assessment step PEC uses when an engineer applies for registration as a Professional Engineer. It is aimed at graduates who already hold a relevant engineering degree and are converting academic knowledge into demonstrable professional competence. The PEC EPE Mechanical case studies are 5 cases and about 4,286 words.
1Fatigue Failure at a Shaft Shoulder on a Conveyor Drive
An AISI 1045 cold-drawn shaft (Sut 630 MPa, Sy 530 MPa) transmits 900 N·m from a gearbox to a belt conveyor. The shaft steps from 45 mm to 40 mm at a bearing shoulder with a 1.2 mm fillet; the belt pull produces a steady radial load of 6.5 kN at 120 mm from that shoulder.
838 words, about 4 min2Underperforming Lube-Oil Cooler After Plant Turndown
A lube-oil cooler is a 1 shell-pass, 2 tube-pass TEMA BEM unit with 17.2 m² of area, designed to cool 3.0 kg/s of oil (cp 2.0 kJ/kg·K) from 85 °C to 55 °C using 2.0 kg/s of cooling water at 24 °C. The design overall coefficient is 340 W/m²·K with F = 0.90.
789 words, about 4 min3Cavitation in a Cooling-Water Pump at High Flow
An open sump supplies a centrifugal pump rated 120 m³/h at 45 m head to a cooling circuit. At the minimum sump level the pump centerline is 3.8 m above the water surface.
859 words, about 4 min4Earned Value, a Supplier Delay, and an Unpriced Client Change
At the end of month 5 of a 10-month, USD 4.8 million machine-build and installation project, the control account reports PV = 2.40 M, EV = 2.00 M, and AC = 2.30 M. The critical path runs through imported gearboxes; the supplier has confirmed a three-week delay, and float on that path is zero.
890 words, about 4 min5Hydrotest Record and Radiograph Discrepancy on an Air Receiver
You are a graduate mechanical engineer at a fabricator building an air receiver to ASME Section VIII Division 1. MAWP is 1.0 MPa; the hydrotest is required at 1.3 × MAWP with a stress ratio of 1.0.
910 words, about 5 min