122 Geometric Dimensioning and Tolerancing 28. How are datum target areas treated on a drawing when the target area is too small to draw? __________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 29. Describe how to properly display the symbols for a circular datum target area, a square datum target area, a rectangular datum target area, and a spherical datum target area. ______________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 30. What does a movable datum target symbol indicate? ________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 31. How are datum target lines represented on a drawing? ______________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 32. When a portion of a surface is used to establish a single datum, this is referred to as a(n) ____________ datum surface. 33. Two or more surfaces that are on the same plane are referred to as ____________ surfaces. 34. Depending on the functional requirements of a part, more than one datum reference frame can be established. This is referred to as a(n) ____________ datum reference frame. 35. Describe the basic function of the continuous feature symbol. _________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________