| A | B |
|---|
| Architect’s Scale | A triangular shape scale that has six faces with 11 different scales normally used to make drawings of buildings and their details. |
| Border Lines | the heaviest line around the edge serving as a frame for the drawing and establishing space between the drawing and the edge of the paper. |
| Centerline | Thin lines made up of long and short dashes with spaces in between to indicate the centers of round objects |
| Construction Lines | Very light lines used as guides for positioning objects on drawings |
| Cutting-plane lines | Heavy dashed lines used to show sectional views. Arrows are extended from the endpoints to illustrate the viewing direction |
| Dimension Lines | shows the actual distance on a line with a number break in the middle and terminates in arrowheads at the end |
| Engineer’s Scale | A fully divided scale used for drawings where large reductions are required. |
| Erasing Shield | A drafting instrument used to remove small error without erasing a large section of the drawing. |
| Extension Lines | Light lines used to project dimension lines to specific points on an object |
| Guidelines | Very light lines used as guides for lettering a drawing |
| Hidden lines | lines that indicate or show the hidden features of a part that isn’t visible from the viewer’s point of view |
| Line Conventions | Symbols that furnish a means of representing or describing some part of an object which are expressed by a combination of line weight and appearance. |
| Mechanical Drafter’s Scale | A scale commonly used in drafting |
| Metric Scale | Is used to make measurements in metric units |
| Object Lines | heavy lines that show the visible edges and intersections of an object also called visible lines |
| Phantom Lines | shows alternate positions of a moving part, repeated details, or the path of motion of an object |
| Primary Centerline | used to indicate the center of a round object in the primary or true-shape view |
| Scale | A measuring device used to convert a full-size dimension to the drawing scale; also refers to the size to which a drawing is made. |
| Scale Clip | A device fastened to a triangular scale, used to identify the scale currently in use. |
| Secondary Centerline | used to indicate the center of a round object in the primary or true-shape view |
| Section Lines | Thin lines showing the exposed surface planes Lines are drawn using patterns corresponding to different materials |
| Symmetry Centerline | long and short dashes that locate the center of symmetric object |
| Visible Lines | Thick lines on a drawing. |
