Question

During welding operation with a heat supply rate of 14 kW, the area of weld beads is 40 ${\text{mm}}^2$ and welding speed of 100 mm/min. if the heat required for melting of weld bead is 0.1 kJ/$m^2$, the welding process used is

• A. Arc welding
• B. Resistance welding
• C. Gas welding
• D. None of the above

Answer 1

The correct option is A Arc welding

$\text{H.R/ sec}=[\text{(area}\times \text{velocity})/60]\times 0.1\text{= 6.67 kJ/sec}$

$\text{Efficiency of welding process =}\frac{6.67}{14}\text{= 47.61\%}$

$\text{Based on the efficiency, the welding process}$

$\text{used in Arc welding process}$

$\text{Efficiency of arc welding is 45 to 55\%}$