Line which represents where a dimension starts and stops.

A line which represents distance

A heavy solid line used on a drawing to represent

the outline of an object.

Line lightly drawn lines to guide drawing other lines and shapes.

A line type that represents an edge that is not directly visible.

A method of representing three- dimensional objects on a plane having only length and breadth. Also referred to as Right Angle Projection.

Line which indicates dimensions of arcs, circles and detail.

Oblique pictorial where depth is represented as half scale compared to the height and width scale.

Oblique pictorial where height, width, and depth are

represented at full scale.

A sketch that shows an object’s height, width, and depth in a

single view.

A form of pictorial sketch in which all three drawing axes form

equal angles of 120 degrees with the plane of projection.

A form of pictorial sketch in which vanishing points are used to

provide the depth and distortion that is seen with the human

eye.

A drawing which contains views of an object projected onto two or more orthographic planes.

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.

A physical representation ofan object. Prototypes and appearance models are physical models.

A full-scale working model used to test and improve a design concept by making actual observations and necessary adjustments.

A part or element

of a larger whole

An enlarged or reduced representation of an object that is usually intended for study purposes.

A type of 3D CAD modeling that represents the volume of an object, not just its lines and surfaces.

Drawings that convey all of the information needed to manufacture and assemble a design

Constant, non- numerical relationships between the parts of a geometric figure. Examples include parallelism, perpendicularity, and concentricity.

To add explanatory

notes to a drawing

The process of choosing and using appropriate mathematics and statistics to analyzee empiricalsituations, To understand them better, and to improve decisions.

A visual, mathematical, or three-dimensional representation in

detail of an object or design, often smaller than the original.

A curve formed at the interior intersection between two or more surfaces.

The measure of mass density is a measure of mass per

volume.

To draw a figure within another so that their boundaries touch

but do not intersect.

A straight or curved line that intersects a circle or arc at one

point only.

A triangle located round a polygon such as a circle. To draw a

figure around another, touching it at points but not cutting it.

3D point defining the geometric center of a solid.

A triangle that contains only angles that are less than 90

degrees.

The amount of three-dimensional space occupied by an object

or enclosed within a container.

The lines of intersection created from three mutually

perpendicular planes, with the three planes’ point of

intersection at the centroid of the part.

A triangle with one angle that is greater than 90 degrees.

A triangle that has a 90 degree angle.

A 3D point where the total weight of the body may be

considered to be concentrated.

Symmetry in which both halves of a composition are not

identical. Also referred to as informal balance.

The correspondence in size, shape, and relative position of parts on opposite sides of a median line or about a central axis. Also referred to as formal balance

The amount of overlap that one part has with another when assembled

Dimensioning in which all dimensions are placed from a datum and

not from feature to feature.

The designation of the size established for a commercial product.

A location dimension that defines the relationship of features of an

object.

A dimension, usually without a tolerance, used for information

purposes only. A reference is a repeat of a given dimension or established from other values shown on a drawing. Reference dimensions are enclosed in ( ) on the drawing.

A tolerance in which

variation is permitted in

both directions from the

specified dimension.

The acceptable amount of dimensional variation that will still allow an object to function correctly..

A dimensioning system where each dimension originates from a common surface, plane, or axis. Also known as baseline dimensioning.

The largest and smallest possible boundaries to which a feature may be made as related to the tolerance of the dimension.

A tolerance in which

variation is permitted in

both directions from the

specified dimension.

The tightest possible fit

between two mating

parts.

A system of dimensioning which requires all numerals, figures, and notes to be aligned with the dimension lines so that they may be read from the bottom (for horizontal dimensions) and from the right side (for vertical

dimensions).

Also known as point-to-point dimensioning where dimensions are

established from one point to the next.

Limits the size of mating parts so that a clearance always results

when mating parts are assembled.

The activity of gathering information about consumers’ needs and preferences.

A list of materials or parts specified for a project. Also referred to as a bill of materials or BOM.

A professional engineering organization that is known for setting codes and standards for mechanical devices in the United States.

A tool used to compare design solutions against one another, using specific criteria.

A type of expository writing that is used to convey information for technical or business purposes.

This is a worldwide organization that creates engineering standards.

A private, non-profit organization that coordinates the development and

use of a voluntary consensus standards in the United States.

A sectional drawing based on a cutting plane line that cuts through one-quarter of an object. A half section reveals half of the interior and half of the exterior.

A drawing that contains all the information for making one part of the design.

Drawings that convey all of the information needed to manufacture and assemble a design.

Used to show “inside” details not apparent on the exterior of the part

A view that is used to show a magnified view of features that are too

small to adequately specify in another view.

A sectional drawing based on a cutting plane line that extends

completely through an object.

A line drawn on a view where a cut was made in order to define the

location of the imaginary section plane.

A section of an object broken away to reveal an interior feature for a

sectional drawing

Thin lines used in a section view to indicate where the cutting plane

line has cut through material.

A view that is used to show features that is located on an inclined

surface in true size and shape.

A conical-shaped recess around a hole, often used to receive a tapered screw.

has internal threads

Gradual diminution of width or thickness in an elongated object

A hole that does not go completely through the work piece.

A cylindrical recess around a hole, usually to receive a bolt head or nut

What type of hole?

What type of hole?

A CAD modeling method that uses parameters to define the size and geometry of features and to create relationships between features. Changing a parameter value updates all related features of the model at once.

A number value or algebraic equation that is used to control the size or location of a geometric figure.

A line used to show the alternate positions of an object or matching part without interfering with the main drawing

The quantitative relation between two amounts showing the

number of times one value contains or is contained within the

other.

A property of a system whose value determines how the system

will behave.

A relatively thin flat member acting as a brace support. Also

called a web.

An assembly drawing in which parts are moved out of position

along an axis so that each individual part is visible

Principles of right action, binding upon the members of a group

and serving to guide, control, or regulate proper and

acceptable behavior.

The moral principles governing or influencing conduct.

The US federal agency with a mission to protect human health

and the environment

The study of workplace equipment design or how to arrange

and design devices, machines, or workspace so that people

and things interact safely and most efficiently.

A government organization whose mission is to assure the

safety and health of America's workers by setting and

enforcing standards; providing training, outreach, and

education; establishing partnerships; and encouraging

continual improvement in workplace safety and health.

A group of people that rely primarily or exclusively on

electronic forms of communication to work together in

accomplishing goals.