Exam 13: Geometric Dimensioning and Tolerancing

Define free state variation.

Give the formulas for internal and external features that can be used when calculating the positional tolerance at any produced size when MMC is applied to the positional tolerance.

Axis straightness can be specified on an MMC basis by plac- ing the MMC symbol after the geometric tolerance in the feature control frame. The specified geometric tolerance is held at the MMC produced size. Explain what happens to the geometric tolerance as the produced size departs from MMC.

What is the difference between the circularity geometric tolerance and the cylindricity geometric tolerance?

Depending on the functional requirements of a part, more than one datum reference frame can be established. This is referred to as a(n) datum reference frame.

How are datum target lines represented on a drawing?

A tolerance is established by a geometric tolerance zone made up of two parallel planes that are a basic 908 to a given datum plane or axis where the actual surface must lie.

Defne virtual condition.

How is a datum target area represented on a drawing?

Given the following drawing and a range of possible pro- duced sizes, provide the geometric tolerance and virtual condition at each possible produced size. 59728_ch13_EOC_ptg01.indd 6 2/3/16 2:21 PM

What does it mean when a feature control frame with a par- allelism geometric characteristic symbol is placed below a diameter dimension?

Define datum.

Define regardless of feature size (RFS).

Name each of the elements in the following feature control frame.

List at least five items that can be considered as datum fea- tures on an object or part.

Given the following drawing, describe the profile geometric tolerance and related drawing specifications. Indicate whether the drawing shows preferred ASME Y14.5 use or an alternate practice.

Name the two types of dimensioning systems that are nor- mally used when locating multiple features.

How is the feature control frame placed in relation to a hole and counterbore when the positional tolerance is different for the hole and counterbore?

How is an axis geometric control specified?