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Engineers
Creative people who use technical means to solve problems
TERM 2
Computer-aided design/drafting (CAD)
DEFINITION 2
Computer software and related computer hardware that
supplements or replaces traditional hand tools for creating
models and technical drawings
TERM 3
Hardware (CAD)
DEFINITION 3
Physical devices used to support the CAD software
TERM 4
Traditional Tools
DEFINITION 4
Devices used to assist the human hand in making techinical
drawings
TERM 5
Media
DEFINITION 5
The surfaces upon which an engineer or technologist
communicates graphical information
Alphabet of Lines
A set of standard linetypes established by the American
Society of Mechanical Engineers (ASME) for technical drawing
TERM 7
Center Lines
DEFINITION 7
Used to represent symmetry and paths of motion and to
mark the centers of circles and the axes of symmetrical
parts, such as cylinders and bolts
TERM 8
Break Lines
DEFINITION 8
Used to show where an object is broken to save drawing
space or reveal interior features
TERM 9
Dimension and Extension Lines
DEFINITION 9
Used to indicate the sizes of features on a drawing
TERM 10
Section Lines
DEFINITION 10
Used in section views to represent surfaces of an object by a
cutting plane
Chain Lines
Used to indicate that a surface is to receive additional
treatment
TERM 17
Symmetry Lines
DEFINITION 17
Used as an axis of symmetry for a particular view
TERM 18
Visualization
DEFINITION 18
Ability to mentally control visual information
TERM 19
Graphics Theory
DEFINITION 19
Geometry and projection techniques
TERM 20
Standards
DEFINITION 20
Sets of rules that govern how parts are made and technical
drawings are represented
Conventios
Commonly accepted practices and methods used for
technical drawings
TERM 22
Tools
DEFINITION 22
Devices used to create engineering drawings and models,
including both handheld and computer tools
TERM 23
Applications
DEFINITION 23
Various uses for technical graphics in engineering design,
such as mechanical, electrical, and architectural
TERM 24
Technical Sketching
DEFINITION 24
The process of producing a rough, preliminary drawing
representing the main features of a product or structure
TERM 25
Imaging
DEFINITION 25
The process that our minds use to take the visual data
received by our eyes to form some structure and meaning
Construction Lines
Very light, thin lines used to roughly lay out some of the
details of sketches or drawings
TERM 32
Multiview Sketches
DEFINITION 32
Present the object in a series of projections, each one
showing only two of the object's three dimensions
TERM 33
Pictorial Sketches
DEFINITION 33
Present the object in a single, pictorial view, with all three
dimensions represented
TERM 34
Axonometric Projection
DEFINITION 34
A parallel projection technique used to create a pictorial
drawing of an object by rotating the object on an axis
relative to a projection, or picture plane
TERM 35
Trimetric Projection
DEFINITION 35
When all three angles of a pictorial sketch are unequal
Dimetric Projection
Whentwo of the threeangles of a pictorial sketch are unequal
TERM 37
Isometric Projection
DEFINITION 37
When all three angles of a pictorial sketch are equal
TERM 38
Parallel Projection
DEFINITION 38
Preserves the true relationships of an object's features and
edges
TERM 39
Perspective Projection
DEFINITION 39
Distorts the object so that it more closely matches how you
perceive it visually
TERM 40
Isometric Pictorial
DEFINITION 40
A type of parallel projection that represents all three
dimensions in a single image
Precedence of Lines
Dictates the linetype to draw when two or more lines in a
viewoverlap
TERM 47
Horizon Line (HL)
DEFINITION 47
An imaginary line in the distance, where objects are infinitely
small and parallel lines converge
TERM 48
Vanishing Point (VP)
DEFINITION 48
The point on the horizon line where parallel lines converge
TERM 49
Ground Line (GL)
DEFINITION 49
Where the portion of the object closest to the observer rests
on the ground plane
