Exam 10: Straightness Tolerance

What are the three things that should come to mind wherever a straightness tolerance with the MMC modifier is associated with a feature of size dimension?

Although Rule #1 provides an indirect straightness tolerance, a straightness tolerance should be specified on surface elements, unless it is a refinement of the dimensional limits of the size dimension (i.e., size tolerance).

A(n) ____________________ is a device that applies the use of optics to measure part geometry.

A straightness tolerance is a geometric tolerance that defines the straightness deviation permitted on individual surface elements or on a derived median line.

Where a straightness tolerance is applied to a surface element that is associated with a size dimension, and Rule #1 does not apply to the size dimension (i.e., overridden, independency, stock size, etc.), the straightness tolerance value may be smaller than the size tolerance.

Where a straightness tolerance is applied to surface elements that are associated with a size dimension, and Rule #1 applies to the size dimension, the straightness tolerance value must be less than the ____________________ tolerance.

Wherever Rule #1 applies to a cylindrical regular feature of size, an indirect straightness deviation requirement exists for the derived median line of the feature of size.

Where a straightness tolerance is applied to a cylindrical feature of size, the ____________________ must be located within the tolerance zone and the tolerance zone is not related to any datums.

____________________ is the condition where an element of a surface, or a derived median line, is a straight line.

What are the two tolerance zone shapes a straightness tolerance can have?

Explain how to determine whether a straightness tolerance is applied to a surface element or a feature of size.

Wherever Rule #1 applies to a cylindrical feature of size, it invokes an indirect straightness deviation requirement on the surface elements.

Define a derived median line.

When verifying a straightness tolerance applied to surface elements, what are the three separate requirements that must be checked?

Where the feature of size is at ____________________, the derived median line of the feature of size must be perfectly straight.