GATE ME 2020 Set 2 — Question 22

MCQ+1 / -0.33MediumForm & Surface FinishMetrology & InspectionMetrology, CIM & Additive Mfg

Metrology, CIM & Additive Mfg → Metrology & Inspection → Form & Surface Finish

Last updated 5 September 2026

Question

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).

Correct answer (A) I-R, II-Q, III-P, IV-S, V-U, VI-T Solution In the standard surface-texture symbol (perpendicular lay), the values are placed as follows: Left of the check mark: roughness height. The upper value (II) is the maximum roughness height (Q) and the lower value (I) is the minimum roughness height (R) . Above the horizontal extension line: waviness specification written as height-width, so III is the maximum waviness height (P) and IV is the maximum waviness width (S) . Below the horizontal extension line (V): the roughness width cutoff (U) . To the right of the lay symbol (VI): the maximum roughness width (T) . So the match is I-R, II-Q, III-P, IV-S, V-U, VI-T. (A) matches all six positions. (B) puts waviness height at II and roughness height at VI, which is wrong. (C) and (D) place the cutoff and waviness values at the roughness-height positions, which is wrong. Answer: (A) Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (A) I-R, II-Q, III-P, IV-S, V-U, VI-T Solution In the standard surface-texture symbol (perpendicular lay), the values are placed as follows: Left of the check mark: roughness height. The upper value (II) is the maximum roughness height (Q) and the lower value (I) is the minimum roughness height (R) . Above the horizontal extension line: waviness specification written as height-width, so III is the maximum waviness height (P) and IV is the maximum waviness width (S) . Below the horizontal extension line (V): the roughness width cutoff (U) . To the right of the lay symbol (VI): the maximum roughness width (T) . So the match is I-R, II-Q, III-P, IV-S, V-U, VI-T. (A) matches all six positions. (B) puts waviness height at II and roughness height at VI, which is wrong. (C) and (D) place the cutoff and waviness values at the roughness-height positions, which is wrong. Answer: (A)

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