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State whether the following statement is true or false regarding the surface roughness in EDM. “In EDM, graphite electrodes produce smoother surfaces than metal ones.”

State whether the following statement is true or false regarding the surface roughness in EDM. “In EDM, graphite electrodes produce smoother surfaces than metal ones.” Correct Answer False

In EDM, graphite electrodes produce rougher surfaces than that of the metal ones.

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The figure below shows a symbolic representation of the surface texture in a perpendicular lay orientation with indicative values (I through VI) marking the various specifications whose definitions are listed below. P: Maximum Waviness Height (mm); Q: Maximum Roughness Height (mm); R: Minimum Roughness Height (mm); S: Maximum Waviness Width (mm); T: Maximum Roughness Width (mm); U: Roughness Width Cutoff (mm); The correct match between the specifications and the symbols (I to VI) is
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