Exothermic welding is used to create what type of joint?

• A. A permanent electrical connection
• B. A temporary joint
• C. A mechanical bond
• D. An insulated joint

Answer: (A)

Exothermic welding creates a permanent electrical connection by fusing conductors together with a molten metal produced by a rapid chemical reaction. The molten filler metal fills gaps and welds the pieces into a single, continuous metal path, giving a low-resistance, durable bond that becomes an integral part of the circuit. Because the joint is formed by welding, it isn’t intended to come apart or to serve as a temporary fit, and it doesn’t involve mechanical bonding or insulation. This makes the result a permanent electrical connection, ideal for grounding and other high-reliability electrical connections.