Engineering Drawing: Basic Descriptive Geometry

4. Basic Descriptive Geometry (4 hours)

4.1 Introduction to Orthographic projection, Principal Planes, Four Quadrants or Angles

4.2 Projection of points on first, second, third and fourth quadrants

4.3 Projection of Lines: Parallel to one of the principal planes, Inclined to one of the principal plane and parallel to other, Inclined to both principal planes, Traces of a Line

4.4 Projection Planes: Perpendicular to both principal planes, Parallel to one of the principal planes and Inclined to one of the principal planes, perpendicular to other and Inclined to both principal planes

4.5 True length of lines: horizontal, inclined and oblique lines

4.6 Rules for parallel and perpendicular lines

4.7 Point view or end view of a line

4.8 Shortest distance from a point to a line

4.9 Edge View and True shape of an oblique plane

4.10 Angle between two intersecting lines

4.11 Intersection of a line and a plane, visible portion of line

4.12 Angle between a line and a plane

4.13 Dihedral angle between two planes

4.14 Shortest distance between two skew lines

4.15 Angle between two non- intersecting (skew) lines