Correct option is A
The process of spot welding basically depends on heat generation and application of forging pressure.
Important points of spot welding are -
The complete resistance spot weld cycle has been divided into four parts.
Electrodes used for spot welding are of many shapes and sizes, the most common is centre tip.
The maximum temperature of weld zone in spot welding is 900oC to 1200oC.
In spot welding spacing between two spot welds are 2t.
