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27 Cards in this Set
- Front
- Back
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Construction Lines
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Very light thin lines used as a guide for positioning objects on drawings.
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boarder lines
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The heaviest lines used in drafting serving as a frame for a drawing and establishing a space between the drawing and the edge of the paper.
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Hidden lines
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Thin, dashed lines used to identify features that cannot be seen in the given view.
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Extension lines
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Light lines used to project dimension lines to specify points on an object.
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Dimension lines |
Thin lines normally drawn between two extension lines, with arrows or ticks at the end and a dimension in the center.
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Orthographic
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A method of showing a three- dimensional object in two dimensional object in two dimensions by displaying various views.
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Unidirectional
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A method of dimensioning in which dimensions are placed horizontally on the drawing sheet and read from the bottom of the drawing.
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Actual size
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The size of the object as measured
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GA
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Gage
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ID / OD
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Inside diameter / Outside diameter
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OC
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On center
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NOM
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Nominal
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HD
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Head
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Section lines
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Section lines used when drawing inside features of an object exposed by a cutting plane. lines are drawn using patterns corresponding to different materials.
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Cutting plane lines
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Heavy dashed lines used to show sectional views. arrows are extended from the end points to illustrate the viewing direction.
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Isometric plane lines
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The angle at which isometric horizontal lines are, which is 30°.
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Pipe
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a cylinder with an outside diameter and an inside diameter.
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Cylinder
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A geometric figure with a uniform circular cross- section through its entire view.
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Tolerance
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an allowable variance from the original dimension.
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What is the initial position of objects in a drawing determined by?
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Construction lines
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Areas not visible on a view are shown with what type of line?
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Hidden Lines
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Lines that have arrows as terminators are called what?
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Dimension Lines
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The terminator of a dimension line is indicated with what type of line?
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Extension Lines
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What is the common angle used in isometric drawings?
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30°
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What is the difference between a cylinder and a pipe?
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A pipe has an inside diameter and an outside diameter.
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What is the projection method used to create 3 or more views?
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Orthographic Projection.
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What is unilateral Dimensioning?
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A method of dimensioning in which dimensions are placed horizontally on the drawing sheet and read from the bottom of the drawing.
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