GD&T Geometric Symbols & Notation

Question 1

What does the symbol ⌀ represent in GD&T?

Accepted Answer

Diameter of a circle.

Answer

Radius of a circle.

Answer

The center of a circle.

Answer

The length of a side in a square.

Question 2

What does the symbol x signify in GD&T?

Accepted Answer

Multiplication factor for tolerances.

Answer

A symbol for angular measurements.

Answer

Maximum allowable dimension.

Answer

A mark for reference dimensions.

Question 3

Which symbol is used to indicate flatness in GD&T?

Accepted Answer

⎯⎯.

Answer

⌀.

Answer

F.

Answer

⊗.

Question 4

What is the purpose of the perpendicularity symbol in GD&T?

Accepted Answer

Ensures a feature is square to a reference surface.

Answer

Indicates symmetry of a feature.

Answer

Determines the size of the feature.

Answer

Checks the center of a circle.

Question 5

What does the angularity symbol control in GD&T?

Accepted Answer

Angle between a feature and the reference plane.

Answer

Angle between two surfaces.

Answer

Angle of rotation.

Answer

Angle of deviation.

Question 6

Which symbol indicates a location of a feature in GD&T?

Accepted Answer

◯.

Answer

⌀.

Answer

⊥.

Answer

☒.

Question 7

How is the concentricity symbol used in GD&T?

Accepted Answer

To ensure the feature is centered on the datum axis.

Answer

To determine the radius of a hole.

Answer

To determine the symmetry of a feature.

Answer

To control angularity.

Question 8

What is the purpose of a profile of a surface in GD&T?

Accepted Answer

To control the outline of a feature.

Answer

To define the feature’s size.

Answer

To define the flatness of a surface.

Answer

To define the roundness of a feature.

Question 9

What does the profile of a line control in GD&T?

Accepted Answer

The contour of a feature.

Answer

The center of a circle.

Answer

The angle of a feature.

Answer

The length of a side.