Question

Why does a blacksmith heat the metal rim to fix it on a cartwheel?

Answer 1

Hint: A metalsmith who creates objects by the process of forcing the metal, using tools to hammer, bend or cut from wrought iron or steel is known as a blacksmith. When the metal rim is heated, its size increases.

Complete step by step answer:
A metalsmith who creates objects by the process of forcing the metal, using tools to hammer, bend or cut from wrought iron or steel is known as a blacksmith. Several objects are produced by Blacksmith like gates, grilles, railings, light fixtures, furniture, sculpture, tools, agricultural implements, decorative and religious items, cooking utensils, weapons, etc.
The process of working of the blacksmith is by heating the pieces of the metal such as wrought iron or steel until the metal becomes soft. Now, this soft metal can be molded into desired shapes like a hammer, anvil, chisel, etc. For the heating purpose natural gas, coal, coke, or oil are used.
The work ability of the metal is indicated by the change in the color of the metal. When the color is bright red or orange it can be molded into the desired shape and when the metal becomes white it starts to acquire the shape.
So, when the blacksmith heats the metal, the size of the metal increases and it is heated to such an extent that it fits the rim of the cartwheel. This cooling acquires the shape of the cartwheel and is safe for use.

Note: We can define the ‘black’ in “blacksmith” as the black fire scale which is a layer of oxides that forms on the surface of the metal during heating and the ‘smith’ means the skilled worker which is an English word.