Question

The iron rims are fitted to the wooden wheels of bullock carts and tongas by process of _____________.

Answer 1

1. Thermal expansion is the process of expansion of materials when applied heat.
2. The iron ring made such that its diameter is slightly less than the diameter of the wooden wheel.
3. The iron ring is heated to red hot and then carefully slipped on to the wooden wheel. On pouring water it contracts and grips the wooden wheel tightly.

Hence, The iron rims are fitted to the wooden wheels of bullock carts and tongas by process of thermal expansion.