Large size bolts head ate made by?

Solution (By Examveda Team)

The correct answer is (C) Hammer forging.

Let's break down why:

Hammer forging is a process where a hammer repeatedly strikes and shapes the metal.
This is ideal for making large bolt heads because it can apply significant force to form the desired shape.
Think of a blacksmith shaping metal with a hammer – that's the basic idea.

Now let's look at the other options:

Swaging: This is a process of reducing the diameter of a metal bar.
It's not suited for creating the head of a bolt.

Roll forging: This is used to shape metal using rotating dies or rolls.
While useful for some shapes, it's not the best choice for forming large, complex bolt heads.

Tumbling: This is a finishing process used to smooth and clean surfaces, not to form them.

Therefore, hammer forging is the most appropriate method for making large-size bolt heads.