ETM1010C (with a grade of C or higher) This course provides the fundamentals of geometric dimensioning and tolerancing (GD&T) as based on the American Society of Mechanical Engineers standard ASME Y14.5-2009. The coverage of topics includes geometric tolerancing symbols and terms, the rules of geometric dimensioning and tolerancing, datums, material condition symbols, tolerances of form, profile, orientation, run-out and location tolerances.