Question

iron rims are heated red hot before fixing them on cart wheels​

Answer 1

Answer:

Iron rims are made slightly smaller than the wheels. They are heated red hot before fixing them on the cart wheels to expand them so that they can be easily fixed on the wheels and water is poured on them to cool them. As the rims cool they contract and take the shape of the wheel and get firmly fixed on the wheels.

Answer 2

Answer:

Explanation:

When iron rims is heated red hot , expands and slips onto the wheel easily. When it is cooled, it contracts we'd grips the wheel firmly.