Practice Test Geeks(GD&T) Geometric Dimensioning and Tolerancing Certification Practice Test
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Form and Orientation Tolerances Flashcards

7 cards from real GD&T practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Form and Orientation Tolerances flashcards as text

  1. What does it mean when a straightness tolerance is applied to the derived median line of a shaft rather than its surface?

    Answer: Rule #1 is overridden and the shaft axis may bow outside the MMC boundary

    Straightness of the derived median line overrides Rule #1, allowing the axis to bend outside the perfect-form-at-MMC boundary while the shaft remains within size limits at each cross-section.

  2. A parallelism tolerance of 0.05 mm applied to a surface means the surface must lie between two planes that are parallel to the datum and separated by:

    Answer: 0.05 mm

    The tolerance value of 0.05 mm directly defines the width of the tolerance zone between the two parallel planes.

  3. Which orientation tolerance would you use to ensure a drilled hole is exactly 90° to a datum surface?

    Answer: Perpendicularity

    Perpendicularity is the orientation tolerance specifically defined for 90° relationships between a feature and a datum.

  4. On a GD&T drawing, a circularity tolerance of 0.02 applied to a sphere means:

    Answer: Every cross-section through the center must have a roundness within 0.02

    Circularity on a sphere requires every cross-section passing through the center to be circular within the tolerance value.

  5. Which of the following best describes the cylindricity tolerance zone?

    Answer: Two coaxial cylinders between which the surface must lie

    Cylindricity's tolerance zone consists of two coaxial (same-axis) cylinders; the entire surface must fall between them.

  6. An angularity tolerance applied to a hole axis at 45° to a datum controls the hole axis within a:

    Answer: Cylindrical zone oriented at 45° to the datum

    When angularity is applied to an axis (feature of size), the tolerance zone is a cylinder oriented at the specified angle to the datum.

  7. What is the primary difference between flatness and parallelism?

    Answer: Parallelism requires a datum reference; flatness does not

    Flatness controls a surface's form independently with no datum, while parallelism controls a surface's orientation relative to a referenced datum.