METALLIC ARC WELDING (MAW) ( continued…….)
{"Image DocumentName": "METALLIC ARC WELDING (MAW) ( continued\u2026\u2026.)", "Image ImageDescription": "A simple transformer however widely employed for A.C. arc welding. The transformer sets are cheaper and simple having no maintenance cost as there are no moving parts. With AC system, the covered or coated electrodes are used, whereas with D.C. system for cast iron and non-ferrous metals, bare electrodes can be used. In order to strike the arc an open circuit voltage of between 60 to 70 volts is required. For maintaining the short arc 17 to 25 volts are necessary. The current required for welding, however, varies from 10 amp. to 500 amp. depending upon the class of work to be welded.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}