When I look up HVAC/R trades in my area for apprenticeship all I can find is Refrigeration Mechanic.
-Read and interpret blueprints, drawings or other specifications.
-Measure and lay out reference points for installation.
-Assemble and install refrigeration or air conditioning components using hand and power tools.
-Measure and cut piping, and connect piping using welding and brazing equipment.
-Start up system and test for leaks using testing devices.
-Recharge system with refrigerant, check and test regulators, calibrate system and perform routine maintenance.
What about heating, ventilation?
What kind of math, science, communication is expected for the entrance exam?