Question

In the tools which are used to dig the soil, the iron blade in these tools fixed to the wooden handle. Which of the following is used during the change?

• A. Expansion
• B. Contraction
• C. Both expansion and contraction.
• D. Neither expansion and contraction.

Answer 1

The correct option is C Both expansion and contraction.

Both expansion and contraction are used during the change.
The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than the wooden handle. The ring is heated and it becomes slightly larger in size (expands). The handle fits into the ring. When the ring cools it contracts and tightly fits on the handle.