... welding.(a) forge (b) fusion3. The principle of applying heat and pressure is widely used in(a) spot welding (b) seam welding(c) projection welding (d) all of these368 n A Textbook ... and pressure, either sequentially orsimultaneously, is widely used in the processesknown as *spot, seam, projection, upset and flashwelding.10.910.910.910.910.9TTTTTypes of ypes of ypes ... the fillet joint, it is assumed that the section of fillet is aright angled triangle ABC with hypotenuse AC making equal angles with other two sides AB and BC.The enlarged view of the fillet...