22. Which is the correct definition of regardless of feature size? a) Regardless of where a feature of size lies within its form tolerance, the tolerance of size must be met. b) Control placed on a feature of size stating that the tolerance of form or position must be met regardless of where the feature lies within its form tolerance. c) Regardless of where a feature of size lies within its size tolerance, the tolerance of size must be met. d) Control placed on a feature of size stating that the geometric tolerance must be met regardless of where the feature lies within its size tolerance. 23. What is "Rule 1" (i.e. the "Envelope Rule" or the "Perfect form at MMC Rule"), and what effect does it have, if any, on flatness? ...straightness? ...perpendicularity? ...position? a) Unless otherwise specified, the limits of size of an individual feature of size control the form of the feature as well as the size. The rule can control flatness and straightness, but not perpendicularity or position. b) Size tolerance controls form tolerance. This rule has no effect on flatness, straightness, or position. c) If specified by using an MMC symbol next to the tolerances in a feature control frame, then size tolerance controls form. It affects flatness, straightness, perpendicularity and position. d) Rule 1 states that the form of a feature must always be perfect, but it has no effect on perpendicularity. 24. What is the difference between a Datum and a Datum Feature? a) A Datum and Datum Feature are synonymous. b) A Datum is theoretical, a Datum Feature is real. c) A Datum is a feature of size, and a Datum Feature is a surface feature. d) A Datum Feature is theoretical, and a Datum is real. 25. What is a Datum Reference Frame? a) Any arbitrary coordinate system. b) A set of target points from which measurements are made. c) A symbol on the drawing that specifies the tolerance associated with a particular feature. d) A set of three mutually perpendicular planes derived from the specified Datum Features in the order of precedence listed in a feature control frame. 26. What is MMC Virtual Condition? a) The collective effect of the MMC limit of size of a feature of size, and any applicable geometric tolerance. b) The largest external feature (e.g. pin), or the smallest internal feature (e.g. hole). c) The perfectly formed envelope that just fits around (or inside of) a feature of size. d) Rule 1 states that the form of a feature must always be perfect, but it has no effect on perpendicularity.