How to Start Using Classroom Assessment Techniques in Your Classroom by @n8ngrimm | Ecology of Education http://bit.ly/aArU3h Great post! How to Use Classroom Assessment Techniques in Your Classroom http://bit.ly/cekUHZ ~> Formative assessment moves student learning forward.
Flux-cored arc welding. Flux-cored arc welding (FCAW or FCA) is a semi-automatic or automatic arc welding process. FCAW requires a continuously-fed consumable tubular electrode containing a flux and a constant-voltage or, less commonly, a constant-current welding power supply.
Before picking a flux, it's useful to have a good definition of flux: Flux is a chemical composition critical to the heat joining methods of soldering, brazing and welding that: 1  Chemically: â¢ Cleans metal surfaces to assist the flow of filler metals over base metals.â¢ 2  Provides a protective barrier against re-oxidation and heat scale.efore picking a flux, it's useful to have a good definition of flux: Flux is a chemical composition critical to the heat joining methods of soldering, brazing and welding that: 1  Chemically: â¢ Cleans metal surfaces to assist the flow of filler metals over base metals.