Question 1

The symbol for a reference dimension is a set of parentheses.

Accepted Answer

The symbol for a reference dimension is indeed a set of parentheses.

Question 2

A(n) ____________________ is a radius that generates a segment of a sphere.

Accepted Answer

spherical radius

Question 3

How is the spherical symbol used on engineering drawings?

Accepted Answer

The spherical diameter symbol is used two different ways on engineering drawings. One use is to indicate that a dimension applies to a spherical shape. The second use is to indicate a spherical tolerance zone.

Question 4

The counterbore symbol indicates the min size of the flat on a flat-bottomed diameter.

Accepted Answer

The counterbore symbol indicates a cylindrical flat-bottomed hole that enlarges another hole; its size typically refers to the diameter and depth of the enlargement, not the size of a flat on a flat-bottomed diameter.

Question 5

The general dimensioning symbol for radius is a(n) ____________________.

Accepted Answer

The answer of The general dimensioning symbol for radius is...

Question 6

The ____________________ may also be used to indicate the depth of a hole, counterbore, or spotface.

Accepted Answer

The answer of The ____________________ may also be used to...

Question 7

The countersink symbol denotes the shape of geometry on a part.

Accepted Answer

The countersink symbol indicates the shape of the counterbore, which is a conical-shaped recess in a part.

Question 8

The tolerance zone for a(n) ____________________ is the same as the tolerance zone for a radius.

Accepted Answer

The answer of The tolerance zone for a(n) ____________________ is...

Question 9

Explain the dimension origin symbol.

Accepted Answer

The answer of Explain the dimension origin symbol....

Question 10

The ____________________ is used to indicate that a dimension applies to the length and width of a square shape.

Accepted Answer

The answer of The ____________________ is used to indicate that...

Question 11

Where a radius is specified, the part surface may have flats and reversals, as long as the arc surface is located within the tolerance zone.

Accepted Answer

This statement is true. As long as the arc surface is located within the specified tolerance zone, the presence of flats and reversals on the part surface are acceptable.

Question 12

How is the diameter symbol used on engineering drawings?

Accepted Answer

The answer of How is the diameter symbol used on...

Question 13

The model coordinate system symbol is optional on CAD models, but is required on orthographic views of an engineering drawing.

Accepted Answer

The model coordinate system symbol is required on CAD models as it helps orient the model in space. However, it is not required on orthographic views of an engineering drawing as these views are 2D representations of the 3D model and do not require spatial orientation.

Question 14

Explain the maximum and minimum dimension symbols.

Accepted Answer

The answer of Explain the maximum and minimum dimension symbols....

Question 15

Define a model coordinate system.

Accepted Answer

The answer of Define a model coordinate system....

Quiz 4: General Dimensioning Symbols