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 resultant condition in GD&T?

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

    Resultant condition is the worst-case boundary produced when a feature is at LMC and has the maximum allowed geometric error.

  2. For a pin (external feature) at LMC with a position tolerance, resultant condition equals:

    Answer: LMC minus the geometric tolerance

    For a pin, resultant condition = LMC − geometric tolerance, representing the smallest envelope the pin can produce.

  3. What does the inner boundary (IB) represent for a hole?

    Answer: The smallest condition of the hole, equal to MMC minus the geometric tolerance

    Inner boundary for a hole = MMC − geometric tolerance, the tightest restriction that must still clear a mating pin.

  4. What does the outer boundary (OB) represent for a pin?

    Answer: The largest space the pin can occupy, equal to MMC plus the geometric tolerance

    Outer boundary for a pin = MMC + geometric tolerance, the largest envelope any conforming pin can produce.

  5. A hole has MMC = 9.8 mm and a position tolerance of 0.2 mm at MMC. What is its virtual condition?

    Answer: 9.6 mm

    Virtual condition for a hole = MMC − geometric tolerance = 9.8 − 0.2 = 9.6 mm.

  6. Which boundary concept and modifier are used to protect minimum wall thickness or edge distance?

    Answer: Resultant condition with the LMC modifier

    The LMC modifier and resultant condition ensure enough material remains at the part's thinnest point, preventing breakout or structural failure.