GATE 2017 ME (ME2) – Question 63
A pin of diameter $25^{+0.020}_{+0.010}$ mm is electroplated with thickness $2.0^{+0.005}$ mm. Neglect gauge tolerance. The GO ring-gauge diameter for the plated pin, to three decimals, is ______ mm.
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Correct answer: 29.03 to 29.03
Explanation
A GO ring gauge checks the external maximum-material diameter. Largest unplated diameter is25.020mm. Maximum plating thickness is2.005mm on each side, so the maximum plated diameter is25.020+2·2.005=**29.030mm**. Gauge tolerance is explicitly neglected.