Which among the following is a property of fusion welding not of solid state welding?

Which among the following is a property of fusion welding not of solid state welding? Correct Answer Filler metal is added

In case of a fusion welding coalescence is accomplished by melting the two parts to be joined, in some cases adding filler metal to the joint, but in case of solid state welding filler metal is not added.

Related Questions

Variation of electrical resistivity $$\rho $$ with temperature T of three solids is sketched (on different scales) in the figure, as curves P, Q and R.
Which one of the following statements describes the variations most appropriately?
Solid State Physics mcq question image
Which of the following welding is NOT a fusion welding process?