Question

which one of the following is a reason why welders must match filler metal composition with the base metal? a to make the electrode easier to handle b to allow for faster welding speeds c to prevent cracking, corrosion, and porosity d to reduce the amount of flux needed

Explanation:

Matching filler metal composition with the base metal ensures similar physical and chemical properties. This helps prevent issues like cracking due to different thermal - expansion rates, corrosion from galvanic reactions, and porosity from poor fusion.

Answer:

C. to prevent cracking, corrosion, and porosity