Q1: Which of the following is categorised as the plastic welding ?

ANS:C - Forge welding

Forge welding is a traditional method of joining two pieces of metal together by heating them in a forge or furnace and hammering them together. It is one of the oldest methods of welding, dating back thousands of years. The process begins by heating the ends of the metal pieces to be welded until they reach a temperature where they become malleable or plastic. This temperature is typically well below the melting point of the metal but high enough to allow the metal to be forged or hammered together. Once heated, the pieces are quickly removed from the forge and placed on an anvil or similar surface. A blacksmith then strikes the pieces with a hammer to forge them together, creating a solid bond between the two pieces. Forge welding is often used for joining pieces of wrought iron, steel, or other metals that can be heated and hammered together. It requires skill and experience to control the heating and hammering process to ensure a strong and durable weld. While it is not as commonly used in modern industrial settings as other welding methods, it is still practiced by blacksmiths and artisans for creating custom metalwork and decorative ironwork.