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:

a) Expands and fits onto the wooden wheel.
b) Contracts and fits onto the wooden wheel.
c) No change in the size takes place.
d) Expands first, then on cooling contracts and fits onto the wooden wheel.

what is the correct answer ??

Answer 1

Answer:

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