Project ForgeManufacturing Engineering
Machining Processes
GATE 2022
Medium
Which of these processes involve(s) melting in metallic workpieces?
- AElectrochemical machining
- Electric discharge machining
- Laser beam machining
- Electron beam machining
Explanation
Electrochemical machining (ECM) removes material by controlled anodic electrochemical dissolution — no melting occurs. Electric discharge machining (spark erosion), laser beam machining, and electron beam machining all remove material by locally melting and/or vaporizing it via intense thermal/kinetic energy input — all three involve melting.
Source: GATE ME 2022 Session 2 (ME-2) (2022)
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