Question

Consider the following basic welding processes:

            1. Arc welding

            2. MIG welding

            3. Laser beam welding

            4. Submerged are welding

Select the correct sequence in increasing order of Heat affected zone (HAZ) using the code given below:

Which one of the following is the correct sequence of  the above steps?

            (a) 1 – 2 – 3 – 4                (b) 1-4-2-3           (c)  3 – 2-4 – 1                 (d) 4 – 3 – 2 -1