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Exam 8: GDT Concepts

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Question 1

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The way to determine which boundary term should be used is if a(n) ____________________ is specified in the feature control frame.

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Question 2

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Where geometric tolerances, containing the MMC modifier are applied to a feature of size, its worst-case boundary is called a(n) ____________________.

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virtual condition (VC) virtual condition VC

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Explain the difference between an MMC virtual condition of an external feature of size and an MMC virtual condition of an internal feature of size.

Where a geometric tolerance is applied to a feature of size, and it does not override____________________, then two worst-case boundaries will exist.

Where the MMC modifier is specified in the tolerance portion of a feature control frame, what four items should come to mind?

What is the main criterion for determining if a worst-case boundary is affected by a geometric tolerance?

An inner boundary (of an internal feature of size) is a worst-case boundary generated by the smallest feature of size (LMC) minus the effects of the applicable geometric tolerance and any additional tolerance (bonus) that may apply.

An outer boundary (of an external feature of size) is a worst-case boundary generated by the largest feature of size (MMC) plus the effects of the applicable geometric tolerance.

What indicates if a geometric tolerance applies to a feature or a feature of size?

If geometric tolerances at RFS are applied to an external feature of size, the worst-case boundary is called the inner boundary.

Where a geometric tolerance at MMC is applied to an external feature of size, the worst-case boundary is called the virtual condition boundary (MMC).

When a feature control frame is associated with a feature, it applies to a surface and does not affect the worst-case boundary.

A(n) ____________________ is an additional tolerance for a geometric tolerance.

A(n) ____________________ is a fixed-limit gage used to verify a virtual condition boundary.

Define a worst-case boundary.