Question

How is a metal rim fixed on a wooden wheel?

Answer 1

On heating, metals undergo expansion and contract to their original size on cooling. Therefore, a metal rim that is fixed on the wooden wheel is a little smaller in size. On heating the metal rim, it expands and then it is fixed on to the wooden wheel. After cooling, metal rim contracts and gets fixed firmly to the wooden wheel. This is how a metal rim is fixed on a wooden wheel.