E D1080 Pages: 3

c) Explain the term ‘flux’ or ‘soldering fluid’. Enumerate the fluxes commonly used
in soldering process.

13 a) What is the difference between a consumable electrode and nonconsumable
electrode? For which processes does a filler metal have to be added by a separate
mechanism?

b) Explain the working of Resistance Spot Welding. State their advantages and
limitations

14 a) Explain operation, equipment and applications of ultrasonic welding.

b) Explain construction and working principle of submerged arc welding 4

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