Attributes . Troubleshoot heating ventilation and air conditioning (HVAC) systems and a variety of low-pressure pneumatic or gas systems;Measuring air flow heat treating and quenching (cooling) processes;Detecting blockages in filters, condensers and chillers;HVAC/R and refrigeration servicing and plastic manufacturing processing;Testing of pressure switches and other relief devices;Calibrating pressure transmitters;Calibrating pressure recorders . Names