Transmission Heat 9 Chemical engineering 4 Fluid dynamics 4 Chemical processes 3 Chemical reactors 3 Design and construction 3 mer ... Heat engineering 3 Mathematics 3 Separation (Technology) 3 Biotechnology 2 Chemical kinetics 2 Chemical process control 2 Distillation 2 Drainage 2 Environmental engineering 2 Equipment and supplies 2 Fluid mechanics 2 Heat exchangers 2 Internal combustion engines 2 Management 2 Mass transfer 2 Measurement 2 Mechanical engineering 2 Piping 2 Plumbing 2 Power resources 2 Power-plants 2 Purification 2 Refrigeration and refrigerating machinery 2 mindre ...