Practice Test Geeks(GD&T) Geometric Dimensioning and Tolerancing Certification Practice Test
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Composite Feature Control Flashcards

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  1. In a composite feature control frame, the upper segment is called the:

    Answer: Pattern-Locating Tolerance Zone Framework (PLTZF)

    The upper segment of a composite feature control frame is called the Pattern-Locating Tolerance Zone Framework (PLTZF), which controls the location of the pattern as a whole.

  2. Which datum references are typically included in the Feature-Relating Tolerance Zone Framework (FRTZF) of a composite callout?

    Answer: Only orientation datums, no location datums

    The FRTZF typically references only orientation datums (like datum A for perpendicularity) but not location datums, since it controls feature-to-feature relationships rather than absolute location.

  3. A composite positional tolerance has PLTZF of ⌀0.8 and FRTZF of ⌀0.3. What does ⌀0.3 control?

    Answer: The spacing between individual features within the pattern

    The FRTZF tolerance of ⌀0.3 controls the spacing and orientation of features relative to each other within the pattern.

  4. Can a composite feature control frame be used with profile of a surface tolerances?

    Answer: Yes, composite profile tolerances are explicitly defined in ASME Y14.5

    ASME Y14.5 explicitly defines composite profile tolerances, where the upper segment controls location and the lower segment controls form, orientation, and feature-to-feature relationships.

  5. When a datum reference is repeated in both the PLTZF and FRTZF of a composite callout, what does it mean in the lower segment?

    Answer: It restricts the FRTZF from translating relative to that datum

    When a datum is repeated in the FRTZF, it restricts translation of the tolerance zone relative to that datum while still allowing the zone to shift in other directions.

  6. Two single-segment position callouts differ from a composite callout because:

    Answer: Each segment of a two single-segment callout independently locates features from its referenced datums

    In a two single-segment callout, each segment independently locates features from its own datum references, whereas the FRTZF in a composite callout controls only feature-to-feature relationships.

  7. In composite tolerancing, which condition must always be true regarding the PLTZF and FRTZF tolerance values?

    Answer: PLTZF must be larger than or equal to FRTZF

    The PLTZF tolerance must always be equal to or larger than the FRTZF tolerance, since the FRTZF zone must fit within the PLTZF zone.