Location always controls ____________, while size usually controls ____.

• A. Orientation, Form
• B. Form, Orientation
• C. Size, Shape
• D. Location, Size

Answer: (A)

The correct understanding of the relationship between location, orientation, and form is essential in Geometric Dimensioning and Tolerancing (GD&T). In GD&T, location controls the position of a feature in a part, ensuring it is where it should be relative to other features. This typically involves controlling both the X, Y, and Z coordinates of the feature, and it can align or locate features in a specific manner.

Orientation, on the other hand, refers to the angular relationship between features—the tilt or direction—defining how a feature is aligned with respect to a datum or a reference.

When considering the context of size, it is understood that size determines the physical dimensions of a feature, such as its height or diameter, while form relates to the geometric shape being free from defects like warping or deviations from the ideal shape.

Therefore, the statement that location controls orientation aligns with the fact that the position of a feature dictates its orientation in relation to other features or datums. Since size generally dictates the physical measurement of a feature but does not inherently account for its exact shape, this interpretation guides us to recognize that form typically pertains to the geometric accuracy of the size rather than its position.

Thus, saying that location always controls orientation accurately reflects