Manual metal arc welding is to be used for welding two plates each measuring 800x200x19mm. given that
Length of weld: 180mm
Length of electrode: 450mm
Diameter of electrode: 50mm
Diameter of electrode: 3mm
Weld reinforcement area: 10%
Spatter and other losses: 15%
Root gap = land = 2mm
Angle of groove : 600
Estimate the required number of electrodes for the weld.