Welding Glossary V
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| Term | Definition |
|---|---|
| Vacuum | A condition in which atmospheric pressure in a closed vessel or chamber has been decreased.This is accomplished by pumping out the air. |
| Vee groove | See butt joint. |
| Vertical down weld | A vertical weld made from the top of the joint to the bottom. |
| Vertical position | A type of weld where the welding is done on a vertical seam or surface. |
| Vertical up weld | A vertical weld made from the bottom of the joint to the top. |
| Visual inspection | A method for determining the quality of a weld by looking at it and comparing it to welds of known high quality. |
| Volt | The unit of measure of electrical pressure in a circuit. |
| Volt/Amp Curve | A graph demonstrating output of a welding power source, showing both volt and amp capabilities. |
| Voltage | The pressure that forces electrons through a conductor, causing amperage to flow.Also referred to as ãelectromotive force (EMF)ä or ãdifference in potential.ä |
| Voltage drop | The voltage loses that occur when electricity travels a long distance from the welding machine due to the resistance in the leads. |
| Voltmeter | An instrument for measuring the voltage in a circuit. |
| Voltage-Sensing Wire Feeder | This type of feeder operates from arc voltage generated by the welding power source. |