Q$\mathrm{.}4$ GMAW DC power source generating $375$ kW power is supplied for making contimuces fillet weld of $25m{m}^{2}x$ sectiveal area in steel workpiece havimg melting temperature $1760K.$ If heat trensfor fictor is $0\mathrm{.}75$ and melting fictor is $0\mathrm{.}65$ then find $($i$)$ the required welding speed for the juint $($iil$)$ Heat generation rate required ar the welding source to fitricate the weid at welding speed of $5m\frac{m}{s}$ mosming weld bead shape as right iscoceles triangle with a leg lenght of $5$ imm