Q:- Three essential factors for producing fusion weld are melting, removal of surface oxide from the joint surfaces and elimination of atmosphere from the region of the arc. Name the fourth one :

Posted on December 16, 2015

(a) The weld must be free from stress.

(b) The filler material must match that of the weld.

(c) The completed joint must at lease match the mechanical properties.

(d) An arc for a heat surface.