GD&T (Geometric dimensioning and tolerancing): Questions & Answers

What is Coordinate Tolerancing? (Ans- A dimensioning system that uses limit or plus-minus tolerancing for certain dimensions. Which of the following is not a problem with coordinate tolerancing? a) Undefined reference surface b) Undefined reference surface precedence c) Inflexible tolerance zones d) Square or rectangular shaped tolerance zones e) Lack of communication of function of part f) Dimensioning a diameter, radius, or counterbore depth (Ans- f) Dimensioning a radius or counterbore depth. What is a Feature Control Frame? (Ans- The Feature Control Frame is a rectangle that contains information detailing the geometric characteristic, the tolerance zone shape, the geometric tolerance, modifiers, and the datum references. What is a Geometric Characteristic? (Ans- A Geometric Characteristic is one of 14 symbols in the geometric tolerancing system that is used to control the size, location, orientation, and form of part features.