IESL Part III study guide
IESL Part III · Work through your exam, one topic at a time.
The Institution of Engineers, Sri Lanka (IESL) is the apex body of engineering professionals in Sri Lanka, incorporated in 1968 by Parliament Act No. 17, and it awards credentials such as Chartered Engineer - CEng (SL) and AMIE (SL) that enable a person to practise as a licensed engineer in the country. The IESL Part III study guide has 7 sections and about 2,564 words.
01Agriculture and Plantation Engineering: Irrigation, Soil–Water, Machinery and Post-Harvest Plant
Agriculture and Plantation Engineering in IESL Part III examines whether you can size field irrigation and drainage systems, work with soil–water relationships, select agricultural machinery, and design post-harvest and processing facilities for paddy, tea, rubber and coconut. Total available water TAW = (θ field capacity − θ wilting point) × root-zone depth; readily available water RAW = manage-allowed depletion (MAD) × TAW, with MAD typically 0.4–0.6 for high-value crops.
384 words, about 2 min02Building Services Engineering: Cooling Loads, Lighting, Water, Drainage and Fire
Building Services Engineering in IESL Part III tests the design and coordination of the environmental, electrical and plumbing systems inside a building: air conditioning and ventilation, lighting, water supply and drainage, fire protection, lifts and the building's electrical distribution. Cooling load is built up from conduction through fabric, solar gain through glazing (use shading coefficients), internal gains from people, lights and equipment, and ventilation outdoor air with both sensible and latent components.
400 words, about 2 min03Civil Engineering: Structural, Geotechnical, Water and Transportation Design
Civil Engineering in IESL Part III spans structural analysis and reinforced concrete design, soil mechanics and foundation design, hydraulics and water resources, transportation and surveying, and construction materials and quality control. Structures: use limit state design with factored load combinations, and check both ultimate (bending, shear, bond, deflection is serviceability) and serviceability criteria.
377 words, about 2 min04Chemical and Process Engineering: Balances, Reactors, Separation and Process Safety
Chemical and Process Engineering in IESL Part III tests material and energy balances, reactor sizing, separation operations, heat transfer and fluid transport in process plants, together with process control and safety analysis. Balances are written on a consistent basis, usually molar for reaction and mass for separations; check degrees of freedom before solving.
356 words, about 2 min05Electrical, Electronics and Telecommunication Engineering: Systems, Machines, Protection and Electronics
Electrical, Electronics and Telecommunication Engineering in IESL Part III covers power system analysis and protection, transformers and machines, power electronics, analogue and digital electronics, and communication links. Per-unit analysis: choose base MVA and base kV, convert impedances with Z pu,new = Z pu,old × (S base,new/S base,old) × (V base,old/V base,new)².
349 words, about 2 min06IT and Communication Engineering: Networks, Protocols, Software, Security and Telecom
IT and Communication Engineering in IESL Part III combines data networking, protocol behaviour, software and database engineering, information security, and telecommunication transmission and services. Layering: OSI seven layers and the TCP/IP stack, with the mapping of functions (routing at network layer, retransmission and flow control at transport layer).
325 words, about 2 min07Mechanical Engineering: Thermodynamics, Fluids, Machine Design and Plant
Mechanical Engineering in IESL Part III tests thermodynamic cycle analysis, fluid flow and turbomachinery, heat transfer, strength and machine element design, manufacturing tolerances, and plant equipment such as boilers and refrigeration systems. Use absolute pressure in gas laws and cycles: p abs = p gauge + p atm.
373 words, about 2 min