Question

Iron rim is made slightly smaller than the wooden wheel.The rim is usually heated before fixing into the wooden wheel, because on heating the iron rim _______ *
Expands and fits onto the wooden wheel

Contracts and fits onto the wooden wheel

No change in the size takes place

Expands first, then on cooling contracts and fits onto the wooden wheel​

Answer 1

Answer:

Expands and fits onto the wooden rim

Answer 2

Answer:

d) expands first, then on cooling contracts and fits onto the wooden wheel.

Explanation:

As we know metals expand on heating, so when we heat the metal rim the metal rim expand and fits onto the wooden wheel. Then cold water is poured so that the rim contracts and fits on the wheel tightly.