AMTT 1120
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Last updated 5:31 PM on 1/19/23
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25 Terms
1
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Visible Lines
Used for all lines on the drawings representing visible lines on the object.
* Thick
* Thick
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Hidden lines
\
Indicate invisible edges or contours.
Consist of short evenly spaces dashes.
\*Medium
Indicate invisible edges or contours.
Consist of short evenly spaces dashes.
\*Medium
3
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Center lines
Made up of alternate long and short dashes.
Indicate the center of an object or part of an object.
\*Thin
Indicate the center of an object or part of an object.
\*Thin
4
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Dimension Lines
A light solid line, broken at the midpoint for insertion of measurement indications.
Have opposite pointing arrowheads at each end to show origin.
\*Thin
Have opposite pointing arrowheads at each end to show origin.
\*Thin
5
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Extension lines
Thin lines used to move the dimension from the surface of the object to a point where the dimension won’t interfere.
\*Thin
\*Thin
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Cutting plane lines
Indicate the plane in which a sectional view of the object is taken.
7
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Last step in making a sketch
\
\
Put in dimensions
8
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Phantom lines
Indicate the alternate position of parts of the object or the relative position of a missing part.
Composed one long and two short evenly spaces dashes.
Composed one long and two short evenly spaces dashes.
9
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Angle in Isometric
30
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Which lines are in relation to dimension lines?
Extension lines
11
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Break lines
Indicate that a portion of the object is not shown on the drawing
\*Short breaks - made by solid freehand lines \n \*Long breaks - solid ruled lines with zigzags
\*Short breaks - made by solid freehand lines \n \*Long breaks - solid ruled lines with zigzags
12
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Leader lines
Solid lines with an arrowhead and indicate a part or portion to which it references to
13
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Sectioning lines
Generally thin lines, that indicate the surface of an object that has been cut to make it stand out from the rest of the object.
Indicate type of material from which the object is made
Indicate type of material from which the object is made
14
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Detail Drawings
Includes all the information needed to fabricate the part.
15
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Assembly Drawings
Shows how two or more components are assembled.
16
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Installation Drawing
Shows the location of the parts and assemblies on the completed aircraft and identifies all the the detail parts used in the installation.
17
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Sectional, Half Sectional, Revolved
Sectional shows how a component would appear if cut through the middle.
18
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Exploded View Drawings
Components are spread out (exploded) so you can see what each part looks like.
19
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Schematic Diagram
Shows relative location of all parts in a system. Does not show actual location. Big help for troubleshooting.
20
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Block Diagram-Flow Chart
Shows the functions of a system. No detail. Shows \n what happens. Purpose is to show how a complex system works.
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Repair Drawings
No dimensions are given but there is enough information \n provided to make an airworthy repair.
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Wiring Diagrams
Show all of the wires in a particular section of \n an aircraft electrical system
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Pictorial Diagrams
Show components as they actually appear, rather than using conventional symbols.
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Isometric
3D type
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Orthographic
2D type