Principal of Refrigeration & Electrical Controlling Devices
Type of Compressor & Compressor Repairing Reciprocating & Rotary
Type of Refrigerant, Oil & Lubrication & Type of Condenser, Oil Separator
Type of Receiver, Filter, Refrigerant, Control Devices & Refrigerator Wiring
Type of Evaporator, Type of Refrigerator & Refrigerator Gas Charging
Type of Water Cooler & Electrical Wiring, ICE Candy Plant, ICE Plant & 3 Phase Panel Control Wiring
Air-Conditioning System & Type of Air-Conditioning System Window & Split A.C., Repairing & Wiring of all Domestic A.C. System
Commercial A.C. System, Cold Storage Plant, Commercial Water Cooler
Package A.C.
