| A | B |
|---|
| distortion and stress | major aspects of contraction |
| minimum root opening | using welds with this will prevent distortion |
| residual stress | remain after weld has cooled |
| post heating | most common way to control residual stress |
| strong backs | stiffeners used to prevent distortion |
| full annealing | most effective way to control residual stress, difficult |
| stick | SMAW |
| core, flux | two parts of electrode |
| low hydrogen electrodes | used to weld high carbon and alloy steels |
| composition of the covering | determines bes polarity for d.c. applications |
| 60% of its filler material | a MIG welder is designed to consume |
| carbon dioxide | improved the GMAW process |
| semi-automatic GMAW | pre-set wire feed power setting and gas flow |
| pull | wire feeder designed for soft wire |
| current density | amperage per square inch in relation to cross sectiona area of the electrode |
| spray, globular, pulse | 3 types of metal transfer |
| transformer rectifier, motor generator | 2 types of power supples for welding |
| reverse polarity | preferred for GMAW |
| adjustment knob | adjust current |
| Drive rolls | move wire from the spool to the torch |
