GD&T Final ME 102
Datum Targets are used for...
Parts of complex geometry or do not require the use of a complete surface
The True Position control CAN control...
Perfect location
When a secondary flat/planar datum is established, there will theoretically be a minimum of ______ points of contact
2
To fully constrain a part in all 6 degrees of freedom, what rule of thumb should designers keep in mind...
3-2-1 Rule
On a cylindrically-shaped datum of size, the actual datum is....
A central axis
Parellelism requires the use of...
A datum
On a cylindrically-shaped datum of size, the actual datum is....
An axis
On a rectangular-shaped datum of size, the actual datum is...
The central plane
You know that the Geometric Tolerance zone is a 3-D cylinder around an axis because...
The datum symbol controls the central plane or central axis
The Number 1 goal when using GD&T is to communicate the proper _______ of the part
Function
You know that a geometric tolerance is controlling a Feature of Size (FOS) because the Feature Control Frame...
Is required to describe the conditions and tolerances It's attached to a feature of size
Rule 1 states that
The part must be in perfect form at MMC
The True Position control is the most common form of GD&T
True
What is the virtual condition of this Feature?
Virtual Condition of External Feature: Dimension + Geometric Tolerance Virtual condition of Internal Feature: Dimension - Geometric Tolerance
When the True Position control is applied, all dimensions locating the Feature are converted to_______ Dimensions
Basic
