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Unit 2 Key Terms

Cabinet Pictorial Oblique pictorial where depth is represented as half scale compared to the height and width scale.
Cavalier Pictorial Oblique pictorial where height, width, and depth are represented at full scale.
Center Line A line which defines the center of arcs, circles, or symmetrical parts.
Construction Line lightly drawn lines to guide drawing other lines and shapes.
Dimension A measurable extent, such as the three principal dimensions of an object is width, height, and depth.
Dimension Line A line which represents distance.
Documentation A formal graphical representation of an object containing information based on the drawing type.
Drawing A formal graphical representation of an object containing information based on the drawing type.
Edge The line along which two surfaces of a solid meet.
Ellipse A regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points is constant, or resulting when a cone is cut by an oblique plane which does not intersect the base.
Extension Line Line which represents where a dimension starts and stops.
Freehand Sketching which is done manually without the aid of instruments such as rulers.
Grid A network of lines that cross each other to form a series of squares or rectangles.
Height The measurement associated with an object’s top-to-bottom dimension.
Hidden Line A line type that represents an edge that is not directly visible.
Isometric Sketch A form of pictorial sketch in which all three drawing axes form equal angles of 120 degrees with the plane of projection.
Leader Line Line which indicates dimensions of arcs, circles and detail.
Line 1. A long thin mark on a surface. 2. A continuous extent of length, straight or curved, without breadth or thickness; the trace of a moving point. 3. Long, narrow mark or band.
Line Conventions Standardization of lines used on technical drawings by line weight and style.
Line Weight Also called line width. The thickness of a line, characterized as thick or thin.
Long-Break Line A line which indicates that a very long objects with uniform detail is drawn foreshortened.
Manufacture To make something, especially on a large scale using machinery.
Measurement The process of using dimensions, quantity, or capacity by comparison with a standard in order to mark off, apportion, lay out, or establish dimensions.
Multi-View Drawing A drawing which contains views of an object projected onto two or more orthographic planes.
Object Line A heavy solid line used on a drawing to represent the outline of an object.
Oblique Sketch A form of pictorial in which an object is represented as true width and height, but the depth can be any size and drawn at any angle.
Orthographic Projection A method of representing three-dimensional objects on a plane having only length and breadth. Also referred to as Right Angle Projection.
Perspective Sketch A form of pictorial sketch in which vanishing points are used to provide the depth and distortion that is seen with the human eye.
Pictorial Sketch A sketch that shows an object’s height, width, and depth in a single view.
Plane A flat surface on which a straight line joining any two points would wholly lie.
Point A location in space.
Profile An outline of an object when viewed from one side.
Projection Line An imaginary line that is used to locate or project the corners, edges, and features of a three-dimensional object onto an imaginary two-dimensional surface.
Projection Plane An imaginary surface between the object and the observer on which the view of the object is projected and drawn.
Proportion 1. The relationship of one thing to another in size, amount, etc. 2. Size or weight relationships among structures or among elements in a single structure.
Scale 1. A straight-edged strip of rigid material marked at regular intervals that is used to measure distances. 2. A proportion between two sets of dimensions used to develop accurate, larger or smaller prototypes, or models.
Section Lines Thin lines used in a section view to indicate where the cutting plane line has cut through material.
Shading The representation of light and shade on a sketch or map.
Short-Break Line Line which shows where part is broken to reveal detail behind the part or to shorten a long continuous part.
Shape A two-dimensional contour that characterizes an object or area, in contrast to three-dimensional form.
Sketch A rough representation of the main features of an object or scene and often made as a preliminary study.
Solid A three-dimensional body or geometric figure.
Technical Working Drawing A drawing that is used to show the material, size, and shape of a product for manufacturing purposes.
Three-Dimensional Having the dimensions of height, width, and depth.
Tone The general effect of color or of light and shade in a picture.
Two-Dimensional Having the dimensions of height and width, height and depth, or width and depth only.
Vanishing Point A vanishing point is a point in space, usually located on the horizon, where parallel edges of an object appear to converge.
Vanishing Point Colloquial term for views of an object projected onto two or more orthographic planes in a multi-view drawing.
Width The measurement associated with an object’s side-to-side dimension.
Created by: Tyler Kingery
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