d) Blooming of flower(xi) Iron rim isusually heated before fixing into the wooden wheel because on heatingmade slightly smaller than the wooden wheel. The rim istheiron rim:a) Expands and fits on to the wooden wheel.b) Contracts and fits on to the wooden yheel.c) No change in the size takes place.wheel.

d) Blooming of flower(xi) Iron rim isusually heated before fixing into

1.	d) Blooming of flower(xi) Iron rim isusually heated before fixing into the wooden wheel because on heatingmade slightly smaller than the wooden wheel. The rim istheiron rim:a) Expands and fits on to the wooden wheel.b) Contracts and fits on to the wooden yheel.c) No change in the size takes place.wheel.
Answer» <p>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</p>