Deck 5: Key GDT Terms

Question 1

The MMC and LMC modifiers may only be used where a feature control frame is applied to a feature of size.

Answer 1

True

Question 2

A complex feature is a single surface of compound curvature or a collection of other features that constrains up to six degrees of freedom.

Answer 2

True

Question 3

Explain the two types of an irregular feature of size.

Answer 3

An irregular feature of size has two types:
1. A directly toleranced feature or collection of features that may contain or be contained by an actual mating envelope: that is a sphere, cylinder, or pair of parallel planes.
2. A directly toleranced feature or collection of features that may contain or be contained by an actual mating envelope: other than a sphere, cylinder, or pair of parallel planes.

Question 4

Non-feature of size dimensions are highly prone to the ____________________ conditions of coordinate tolerancing.

Question 5

Every feature of size has a maximum and least material condition.

Question 6

Explain the differences between related and unrelated actual mating envelopes.

Question 7

A(n) ____________________ is a physical portion of a part or its representation on drawings, models, or digital data files.

Question 8

A(n) ____________________ is a dimension across two opposed (or partially opposed) surfaces, line elements, or points.

Question 9

In the language of GD&T, explain the differences between two planar surfaces being opposed, partially opposed, or non-opposed.

Question 10

List the four concepts that make up the definition of a regular feature size.

Question 11

A(n) ____________________ is a general term that is used to refer to either a regular feature of size or an irregular feature of size.

Question 12

Define an actual mating envelope.

Question 13

An irregular feature of size must have an actual local size.

Question 14

A(n) ____________________ is the measured value of any individual distance at any cross section of a feature of size.

Question 15

An irregular feature of size requires opposed surfaces or elements.