GATE ME 2014 Set 4 — Question 62
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Metrology, CIM & Additive Mfg → Metrology & Inspection → Gauge Design
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Question
A GO-No GO plug gauge is to be designed for measuring a hole of nominal diameter with a hole tolerance of . Considering of work tolerance to be the gauge tolerance and no wear condition, the dimension (in mm) of the GO plug gauge as per the unilateral tolerance system is
Correct answer
(D) 24.985^(+0.003)_(-0.000)
Solution
1.Hole Limits: Nominal diameter is with tolerance .
- Lower Limit (LL) = .
- Upper Limit (UL) = .
3.Gauge Tolerance (GT): of .
4.GO Gauge Design: For a hole, the GO gauge checks the Lower Limit (minimum material condition). Thus, the basic size of the GO gauge is .
5.Unilateral System: In the unilateral system, the gauge tolerance is applied in one direction, typically into the part's tolerance zone to ensure no defective parts are accepted. For a hole GO gauge, the tolerance is added to the LL.
- GO gauge dimension = .
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