Final answer:
The correct answer to the question is 'Fillet' for local joints and 'Seam' for continuous ones in welding. Fillet welding is used for joining two surfaces at right angles, while seam welding creates continuous welds between similar metals.
Step-by-step explanation:
Welding is a fundamental technique in the field of engineering, where metal parts are joined together using the application of heat and solder. The process generates either local or continuous joints between metal materials. Among the options provided, the correct answer is: local joints can be referred to as "Fillet", and continuous ones as "Seam". A fillet weld is used to join two surfaces at an approximate right angle to each other, creating a triangular cross-section. Seam welding, on the other hand, is a resistance welding process that produces a weld at the faying surfaces of two similar metals by passing current through the metal surfaces. This method is commonly used to make continuous welds.
Welding has been a vital skill since its use by blacksmiths for joining iron and steel pieces through forge welding, an ancient technique that is a precursor to modern welding methods which use gas, electricity, and lasers as sources of heat.