Exam 9: Flatness Tolerance

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What are the five conditions that apply where a flatness tolerance is applied to a planar surface?

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Thwe following conditions apply:
1. The tolerance zone is the space between two parallel planes
2. The tolerance zone may be oriented to best fit the high and low points of the surface
3. All surface elements of the controlled surface must be within this zone
4. The distance between the parallel planes is equal to the flatness tolerance value
5. The tolerance zone extends across the length and width of the surface

Wherever Rule #1 applies to a planar regular feature of size, a(n) ____________________ flatness deviation requirement exists for the derived median plane of the feature of size.

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What are the four areas of requirements that should be looked at to determine if a flatness tolerance is a standard-compliant specification?

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The four area of requirements, represented by the initials CARE, are:
1. Check for datums
2. Assess the application
3. Review the modifiers
4. Evaluate the tolerance

A(n) ____________________ is a solid, flat plate used as the main horizontal reference plane for precision inspection and tooling setup.

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If the limit of the flatness deviation provided by Rule #1 is sufficient for the function of the application, there is no need to specify a flatness tolerance.

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Where a flatness tolerance is applied to a surface that is associated with a size dimension, and Rule #1 applies to the size dimension, the flatness tolerance value must be more than the size tolerance.

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Explain how you can determine whether a flatness tolerance is applied to a planar surface or a feature of size.

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____________________ is the condition of a surface or a derived median plane having all of its elements in one plane.

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A dial indicator, also known as a dial gage and probe indicator, is an instrument used to accurately measure small linear distances, and is frequently used in inspection of parts.

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The tolerance zone for a flatness tolerance is the space between two perpendicular planes.

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If a flatness tolerance is applied to a surface, the high and low points of the surface must be within the tolerance zone.

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Two typical form deviations are waviness and ____________________.

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Define flatness tolerance.

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A(n) ____________________ is an imperfect plane formed by the center points of all line segments bounded by the feature of size.

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Describe Rule #1's effects on flatness deviation of a surface.

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