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What happens to the surface roughness if oxygen gas is introduced in the gap?(a) Increases(b) Decreases(c) Decrease and then increase(d) All of the mentionedThe question was posed to me in unit test.My question comes from EDM-Surface Integrity in chapter Thermal Processes of Advanced Machining |
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Answer» RIGHT CHOICE is (B) Decreases To explain: In EDM, surface ROUGHNESS increases with the supply of OXYGEN gas in gaps. |
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