Deck 13: Geometric Dimensioning and Tolerancing

Question 1

Name the following symbol and identify the proper drafting dimensions A and B.

Answer 1

.

Question 2

Completely define the term basic dimension.

Answer 2

. A basic dimension is considered a theoretically perfect dimension. Basic dimensions are used to describe the theoretically exact size, profile, orientation, or location of a feature or datum target. These dimensions provide the basis from where permissible variations are established by tolerances on other dimensions, in notes, or in feature control frames.

Question 3

Given the following symbols, provide the meaning of each symbol in the spaces to the right.

Answer 3

Question 4

Name the five types of geometric characteristic symbols.

Question 5

List the five basic types of dimensioning and geometric tolerancing symbols.

Question 6

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

Question 7

What information is placed in the top half of the datum target symbol?

Question 8

Label the symbol in the following application using the blank provided.

Question 9

Name each of the following geometric characteristic symbols.

Question 10

Define datum plane.

Question 11

Name the following symbols.

Question 12

Identify at least five locations where a feature control frame can be placed on a drawing.

Question 13

What information is placed in the lower half of the datum target symbol?

Question 14

Any letter of the alphabet can be used to identify a datum ex- cept for , , and .

Question 15

Define datum.

Question 16

Describe datum feature simulators. Include the term simu- lated datums in your description and give at least three ex- amples of datum feature simulators used in manufacturing.

Question 17

Name the following symbols and identify the proper draft- ing dimensions and features C through G and put symbol name at A and B.

Question 18

Name the following symbol and identify the proper drafting dimensions B through F and put symbol name at A.

Question 19

Define datum feature.

Question 20

How are basic dimensions shown on a drawing?

Question 21

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.

Question 22

What does a movable datum target symbol indicate?

Question 23

The secondary datum plane must be established by at least point(s) on the secondary datum surface.

Question 24

The tertiary datum plane must be established by at least point(s) on the tertiary datum surface.

Question 25

When referring to the datum reference frame in the feature control frame, the datum is given first fol- lowed by the and datums. This is known as the datum .

Question 26

Define actual mating envelope.

Question 27

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

Question 28

Define tangent plane.

Question 29

How are datum target areas treated on a drawing when the target area is too small to draw?

Question 30

Name the three datums of a complete datum reference frame.

Question 31

How are datum target lines represented on a drawing?

Question 32

Describe how to properly display the symbols for a circular datum target area, a square datum target area, a rectangular datum target area, and a spherical datum target area.

Question 33

Define degrees of freedom.

Question 34

Two or more surfaces that are on the same plane are re- ferred to as surfaces.

Question 35

When a portion of a surface is used to establish a single da- tum, this is referred to as a(n) datum surface.

Question 36

Define datum targets.

Question 37

The primary datum plane must be established by at least point(s) on the primary datum surface.

Question 38

Identify the datum feature, the part, the simulated datum plane, the physical datum feature simulator, and the datum plane labeled A through F on the following illustration.

Question 39

How is a datum target area represented on a drawing?

Question 40

Identify at least three required conditions for datum feature simulators.

Question 41

Given the following drawing and a list of possible produced sizes, specify the geometric tolerance at each possible produced size.

Question 42

Which of the following statements are true in regard to da- tum precedence and datum reference? (More than one can be true.) A) Datum precedence is established by the order of place- ment in the feature control frame. B) Datum precedence is established by alphabetical order of datum reference letters. 59728_ch13_EOC_ptg01.indd 4 2/3/16 2:21 PM C) The first datum listed in the feature control frame is the primary datum reference. D) "A" is always the primary datum. E) The third datum listed in the feature control frame is the tertiary datum reference. F) RMB is assumed unless otherwise specified.

Question 43

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

Question 44

Describe the basic function of the continuous feature symbol.

Question 45

Given the following drawing and a list of possible produced sizes, specify the geometric tolerance at each possible produced size.

Question 46

Define form tolerances.

Question 47

Explain the difference between the methods used to repre- sent surface and axis straightness.

Question 48

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.

Question 49

Given the following drawing and a list of possible produced sizes, specify the geometric tolerance at each possible pro- duced size.

Question 50

Define free state variation.

Question 51

Define regardless of feature size (RFS).

Question 52

Which geometric tolerance is characterized by any given cross section taken perpendicular to the axis of a cylinder or cone or through the common center of a sphere?

Question 53

Give the proper abbreviation and definition for regardless of material boundary.

Question 54

Define restrained condition.

Question 55

How is a feature control frame connected to a related fea- ture when surface control is intended?

Question 56

Given the following drawing and a list of possible produced sizes, specify the geometric tolerance at each possible pro- duced size.

Question 57

What geometric tolerance establishes the distance between two parallel planes within which the surface must lie?

Question 58

Define perfect form boundary.

Question 59

How is an axis geometric control specified?

Question 60

Name the geometric tolerance that specifies a zone within which the required surface element or axis must lie.

Question 61

Define true position.

Question 62

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

Question 63

A(n) geometric tolerance zone is established by two parallel planes at any specified basic angle, other than 908, to a datum plane or axis. The specified angle must be , and it must be dimensioned from the plane.

Question 64

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

Question 65

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.

Question 66

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

Question 67

Give the formulas for calculating the slot boundary when applying positional tolerancing to slotted features.

Question 68

Define perpendicularity.

Question 69

Given the following drawing, a reference chart showing a range of possible produced sizes, and four optional feature control frames that can be applied to the diameter dimen- sion, provide the positional tolerance at each possible pro- duced size for each feature control frame application.

Question 70

When the axis of a hole is at an extreme angle inside the positional tolerance zone, it is referred to as .

Question 71

Describe when composite positional tolerancing is used.

Question 72

Define tangent plane and describe the relationship among the actual surface, the tangent plane, and the geometric tolerance.

Question 73

Define radial element and describe how a radial element specification is applied to a drawing.

Question 74

Given the following drawing, a reference chart showing a range of possible produced sizes, and three optional feature control frames that can be applied to the diameter dimension, provide the geometric tolerance at each possible produced size for each feature control frame application.

Question 75

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.

Question 76

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

Question 77

Calculate the minimum edge distance or minimum wall thickness between the edge of a hole and the outside surface of the part for an LMC positional tolerance application given the following information (dimensions are in millimeters).

Question 78

Define parallelism.

Question 79

Describe the purpose of location tolerances.

Question 80

When using composite positional tolerancing, the upper part of the feature control frame is referred to as the and specifies the larger tolerance for the pat- tern of features as a group, while the lower half of the frame is called the and specifies a smaller positional tolerance for individual features within the pattern.