GD&T (Geometric Dimensioning and Tolerancing)
GD&T is a standardized symbolic language used on engineering drawings to precisely communicate design intent, including allowable variations in form, orientation, location, and runout. It follows standards such as ASME Y14.5 or ISO 1101.
Governing FormulaN/A
Knowledge Check
1.What does GD&T stand for?
2.Which ASME standard defines GD&T rules and symbols?
3.What is a Feature Control Frame (FCF)?
4.What does the MMC modifier (Ⓜ) stand for?
5.For a hole, what is the Maximum Material Condition (MMC)?
6.What does the LMC modifier (Ⓛ) stand for?
7.Which GD&T symbol is a circle with a cross inside (⊕)?
8.What is a 'basic dimension' in GD&T?
9.How many datum references can a feature control frame contain?
10.What is the symbol for perpendicularity in GD&T?