Syllabus content and objectives
Official WAEC Refrigeration and Air-Conditioning outline · Detailed Syllabus
Content
Basic refrigeration cycle (evaporation, compression, condensation, expansion), layout diagrams, system components/accessories (relays, thermostats, solenoids, capacitors), refrigerant types/classifications/cylinder colour codes, chemical formulae, flow controls (TEV, AEV, capillary tube), psychrometric properties of air, psychrometers, sensible/latent heat, compressor types/constructions, condenser types/servicing/heat load, liquid receivers, service valves, and evaporator types/construction/servicing
Objective
Explain the vapor compression refrigeration cycle and system accessories; identify refrigerants by chemical names, formulae, properties, and cylinder color codes; operate expansion devices (TEV, AEV, capillary); measure air psychrometric properties using sling psychrometers and distinguish latent vs sensible heat; evaluate construction and working principles of compressors, condensers, and evaporators; service condensers and evaporators and compute heat load estimates.
Opens the CBT engine with Refrigeration and Air-Conditioning past questions and answers.