| A | B |
|---|
| 5 major weld defects | porosity, inclusions, undercut, incomplete fusion |
| weld test most commonly used by welder | visual inspection |
| disadvantages of dye penetrant test | cannot inspect thick materials |
| magnetic particle testing | non destructive |
| ? | white powder used with non destructive dye penetrant test |
| free bend test | used to test ? |
| 3 specimens used to test groove and plate | ??? |
| systems for identifing filler metals | AWS, ASTM, AISI |
| NEMA | Developed colored dot system |
| Volt | measures pressure |
| wattage | measures power |
| amps | amount of electrons in a circuit |
| radiography | very reliable method of testing but emits harmful rays |
| 80 volts | maximum safe open circuit voltage |
| 11,000 degrees | approximate temperature of welding arc |
| 3 types of current | DC reverse polarity, DC straight, AC |
| On a constant current powere source, as the amperage increases | the voltage decreases |
| 3 sources of heat that can create burns | thermal, chemical, radiant |
| inverter machines | solid state parts, small compact, fewer moving internals |
| tensile | resistance to being pulled apart |
