Question:easy
Which ONE or MORE of the following welds can be performed through resistance welding method?
Which ONE or MORE of the following welds can be performed through resistance welding method?
Show Hint
Think about which weld types are defined by how the electrodes touch the plates rather than by joint geometry needing filler.
Updated On: Jul 28, 2026
- Seam
- Spot
- Fillet
- Groove
Show Solution
The Correct Option is A, B
Solution and Explanation
Step 1: Recall how resistance welding works. $\\$
Two copper electrodes clamp the plates together and a large current is forced through the contact area. Heat from the plates' own electrical resistance melts a small fused zone, no filler rod and no arc is used. $\\$
Step 2: Match this to seam and spot welds. $\\$ Spot welding uses two point electrodes to fuse overlapping sheets at one spot, which is the direct textbook example of this process. Seam welding replaces the point electrodes with rolling wheel electrodes, so the same resistance heating happens continuously along a line, giving a leak tight seam. Both fit the resistance welding description. $\\$
Step 3: Rule out fillet and groove. $\\$ Fillet and groove describe the shape of the joint itself (a corner fillet, or a machined groove between butted edges), not the heating method. Filling that shape needs molten filler metal deposited by an arc or gas process, something resistance electrodes cannot supply. $\\$
Final Answer: $\\$ Seam and spot are resistance welding types; fillet and groove are joint shapes made by arc welding. \[ \boxed{\text{A and B}} \]
Step 2: Match this to seam and spot welds. $\\$ Spot welding uses two point electrodes to fuse overlapping sheets at one spot, which is the direct textbook example of this process. Seam welding replaces the point electrodes with rolling wheel electrodes, so the same resistance heating happens continuously along a line, giving a leak tight seam. Both fit the resistance welding description. $\\$
Step 3: Rule out fillet and groove. $\\$ Fillet and groove describe the shape of the joint itself (a corner fillet, or a machined groove between butted edges), not the heating method. Filling that shape needs molten filler metal deposited by an arc or gas process, something resistance electrodes cannot supply. $\\$
Final Answer: $\\$ Seam and spot are resistance welding types; fillet and groove are joint shapes made by arc welding. \[ \boxed{\text{A and B}} \]
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