Technical Drawings Flashcards
What are the 3 types of technical drawings?
1 orthographic
2 pictorial
3 schematic
What are the 2 types of orthographic drawings?
- First angle orthographic
- Third angle orthographic
What are the 3 types of pictorial drawings?
- Isometric
- Oblique
- Perspective
In orthographic what angle are objects being drawn?
90 degrees
What are the 3 elevations most common in orthographic drawings?
- Front
- Side
- Plan (top or bottom)
In isometric drawings all lines are drawn to what angle?
30 degrees to the horizontal
In oblique drawings what angle is the face drawn?
90 degrees
Other than the face what angle are the other sides drawn to in oblique?
45 degrees typically
What lines show the surfaces and features of the object that are not seen in the chosen view?
Hidden lines
What do hidden lines look like?
Thin dotted line
What line is used to shorten the view of long uniform sections?
Break line
What can break lines look like? (2)
- (Long) thin jagged or lightening bolt line
- (Short) thick wavy line
What are the lines that indicate the visible outline of an object called?
Object lines
What do object lines look like?
Thick, dark
What do centre lines look like? (2)
- Long thin dash lines
- Very thin straight lines
