IESL Part I case studies
IESL Part I · Put your knowledge to work in context.
The Institution of Engineers, Sri Lanka (IESL) is described on its own website as "The apex body of engineering professionals in Sri Lanka," incorporated in 1968 by Parliament Act No. 17, with over 25,000 members. IESL states that it awards credentials such as Chartered Engineer – CEng (SL) and AMIE (SL) enabling a person to practise as a licensed engineer in the country, and that it is the sole credentialing authority for engineering degrees offered in Sri Lanka, including for the internationally recognised Washington Accord. The Part I Examination is known in IESL's own announcements as the "B Paper Examination"; IESL publishes results of sittings under that name, for example a passed candidates list for the March 2026 sitting. The IESL Part I case studies are 5 cases and about 3,153 words.
1Greenhouse Tomato Salinity and Fertigation Decision
A 0.8 ha greenhouse tomato crop is drip-irrigated with water from a borehole. The system has 2 L/h emitters at 30 cm spacing and runs four 45-minute cycles per day.
667 words, about 3 min2Low Delta-T and Humidity in a Variable-Flow Chilled-Water Plant
A 12-storey office building has a 1,200 TR chilled-water plant with two equally sized variable-speed centrifugal chillers in a primary-secondary configuration. Design chilled-water supply/return is 6.5/13.0 C.
679 words, about 3 min3Deep Excavation Adjacent to a Sensitive Masonry Building
A 12 m deep basement excavation in soft marine clay is supported by a 0.8 m thick diaphragm wall with three levels of steel struts. The adjacent six-storey masonry building is 8 m from the wall.
584 words, about 3 min4Batch Nitration Runaway Risk and Scale-Up
A 5 m3 batch reactor is used for nitration of an aromatic compound with mixed acid. The reaction mass is 4,200 kg with a heat capacity of 2.1 kJ/kg·K.
618 words, about 3 min5Power-Factor Correction and Harmonic Resonance in a VFD Plant
A factory is supplied by a 1,000 kVA, 11 kV/400 V transformer. Monthly maximum demand is 650 kW at 0.78 power factor.
605 words, about 3 min