When a centerline and cutting- plane line coincide, the one
that is more important to the readability of the drawing takes
precedent over the other.
Break lines should be placed so as not to coincide with other
lines of the drawing.
The following line gives the order of precedence of lines.
- Full line
- Dashed line
- Careful line or cutting – plane line
- Break lines
- Dimension and extension lines.
- Crosshatch lines.
5.3. Pictorial Projections
By means of multi view drawing, it is possible to represent
accurately the most complex forms by showing a series of
exterior views and sections. This type of representation has,
however, two limitations: its execution requires a through
understanding of the principles of multi view projection, and
it’s reading requires a definite exercise of the constructive
imagination.
Frequently it is necessary to prepare drawings that are
accurate and scientifically correct, and that can be easily
understood by persons with out technical training. Such
drawings show several faces of an object at once,