GD&T (Geometric dimensioning and tolerancing)
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.
- / 2
In which compartment of the Feature Control Frame is the Geometric Characteristic located?(Ans- The geometric characteristic is located in the first compartment of the feature control frame.
What are the 5 categories of GD&T characteristics?(Ans- Form, Profile, Orientation, Location, or Runout.
What is the term for a very precise, symbol-driven, engineering language consisting of precise definitions and symbols that helps to assure form, fit, and function of individual part features and relationships?(Ans- GD&T.
In order for a tolerance zone shape to be cylindrical, what symbol must be present in the second compartment of the Feature Control Frame?(Ans- Ø (Diameter)
If no symbol is shown in the feature control frame, then...(Ans- ...the zone will be two parallel straight lines, two parallel planes, or uniform boundaries
Define Geometric Tolerance.(Ans- A general term used in the geometric tolerancing system. It applies to tolerances used to control size, location, orientation, and form.
In what compartment of the Feature Control Frame is the geometric tolerance contained?(Ans- The second compartment.
What are modifiers?(Ans- Modifiers are symbols within the feature control frame that can increase the amount of the stated geometric tolerance or extend the length of the tolerance zone. They are contained in the tolerance or datum compartments (2nd or 3rd frame).
- / 2