Practice Test Geeks(GD&T) Geometric Dimensioning and Tolerancing Certification Practice Test
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GD&T Virtual Condition and Boundary Concepts Flashcards

6 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 6 GD&T Virtual Condition and Boundary Concepts flashcards as text

  1. What is virtual condition in GD&T?

    Answer: The worst-case boundary generated by the collective effects of MMC size and the applicable geometric tolerance

    Virtual condition is the worst-case boundary produced by combining MMC size with the full geometric tolerance, used for functional gauging.

  2. For an external feature (pin) at MMC with a position tolerance, virtual condition equals:

    Answer: MMC plus the geometric tolerance

    For a pin (external feature), virtual condition = MMC + geometric tolerance, giving the largest boundary the pin can occupy.

  3. For an internal feature (hole) at MMC with a position tolerance, virtual condition equals:

    Answer: MMC minus the geometric tolerance

    For a hole, virtual condition = MMC − geometric tolerance, representing the smallest the hole boundary can be.

  4. A pin has an MMC of 10.2 mm and a perpendicularity tolerance of 0.1 mm at MMC. What is its virtual condition?

    Answer: 10.3 mm

    Virtual condition for an external feature = MMC + geometric tolerance = 10.2 + 0.1 = 10.3 mm.

  5. A functional (go) gauge designed to check a pin is sized to which boundary?

    Answer: Virtual condition

    A go gauge is sized to the virtual condition so it accepts every conforming pin while rejecting those that violate the worst-case boundary.

  6. Virtual condition applies specifically when which modifier is called out in the feature control frame?

    Answer: MMC (Maximum Material Condition)

    Virtual condition is tied to the MMC modifier; it defines the fixed worst-case boundary against which functional gauges and mating parts are designed.