Correct option is A
Friction welding is not a conventional welding process as it falls under the category of
solid-state welding techniques. Unlike conventional welding processes, which rely on melting and fusing materials (e.g., gas welding, arc welding), friction welding joins materials by generating heat through mechanical friction at the interface, followed by forging pressure.
Conventional welding is the process of joining two similar or dissimilar metal by applying heat with or without the application pressure or a filler metals.
· Thermit welding.
· Gas welding
· Arc welding
