aws cwi preparation blog

Q:-When using multiple SAW arc systems (twin wire etc) the arc after have different polarities are used as AC rather than DC polarity. This is to,

Posted on


  • Prevent the arc blow between the arcs
  • To minimize the productivity
  • To even out the power factoron the main supply
  • Make it easier to initiate the arc
Advertisements

Q:- A plug weld and a spot weld differ in which h of the following

Posted on


  • A plug weld has a hole in one member 
  • A spot weld has a hole in one member 
  • A spot weld is an arc weld 
  • A plug weld is a friction weld