Questions and Answers
What is a construction line?
A very light line used to lay out a preliminary shape.
What is an object or visible line?
A thick line that outlines the object.
What does a hidden line indicate?
A thin but dark and dashed line that indicates the edge of a hidden surface.
What is a dimension line?
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What is the purpose of an extension line?
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What does a center line indicate?
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What is a cutting plane line?
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What is a section line?
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What does a short break line represent?
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What is a long break line?
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What is a phantom line?
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What is a .53 mm lineweight?
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What is the lineweight for dimensions?
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What is the height of the text in technical drawings?
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What is the lineweight of centerlines?
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Study Notes
Construction Lines
- Used to lay out preliminary shapes.
- Very light lines to guide dimensioning and object placement.
Object or Visible Lines
- Thick lines that outline the visible edges of an object.
- Essential for defining the overall form in technical drawings.
Hidden Lines
- Thin, dark, dashed lines indicating hidden surfaces or edges.
- Provide information about features not directly visible in the view.
Dimension Lines
- Thin dark lines with arrowheads indicating measurement direction and size.
- Essential for conveying precise dimensions in designs.
Extension Lines
- Thin dark lines extending from an object to show limits of dimension lines.
- Help clarify the dimensional relationships in drawings.
Center Lines
- Thin dark lines designating the center of circles, arcs, and cylinders.
- Critical for symmetry and aligning features.
Cutting Plane Lines
- Thick dark lines showing where an object is cut to reveal internal details.
- Thicker than object lines to highlight the cut section.
Section Lines
- Thin light lines usually at 45 degrees indicating cut-open surfaces.
- Used in sectional views to illustrate material and interior details.
Short Break Lines
- Wiggly lines equal in thickness to object lines.
- Indicate that only a portion of a larger object is shown in the drawing.
Long Break Lines
- Thick dark lines with spikes used to represent long objects shown partially.
- Essential for simplifying complex drawings by omitting sections.
Phantom Lines
- Light thin lines with alternate long and short dashes.
- Indicate changing positions or different states of moving parts.
Phantom Line Type
- Style of line representing movement or alternate positions in designs.
Hidden Line Type
- Represents edges not visible in the current view, important for clarity in complex objects.
Dashed Line Type
- Typically indicates non-visible boundaries or specific features in design documentation.
Border Line Type
- Defines the perimeter or boundaries of the drawing area.
- Ensures clarity and organization of technical drawings.
Centerline Line Type
- Identifies center positions in diagrams, crucial for symmetry and balance.
Lineweight of Object Line (53 mm)
- Defined thickness for primary object outlines; ensures visibility.
Lineweight of Dimensions (25 mm)
- Standard thickness for dimension lines, providing clear measurements.
Height of Text (125 mm)
- Specifies standard height for text in technical drawings; enhances readability.
Lineweight of Centerlines (20 mm)
- Represents the thickness of centerlines, ensuring they stand out for operational clarity.
Extension Gap
- Denotes the space between the dimensional line and its extension lines.
Dimension
- Refers to measurements of an object, crucial in engineering and technical drawings.
Arrowhead
- The geometric symbol used at the ends of lines to indicate direction in dimension lines.
Diameter Dimension
- Used to specify the diameter of circular features in technical drawings.
Radius Dimension
- Indicates the radius measurement of arcs and circular features.
Tolerance with Deviation
- Describes allowable variations in dimensions, ensuring parts fit together properly.
Tolerance Dimension
- Provides limits on permissible variations from specified measurements.
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Description
Test your knowledge of different lines used in drafting and technical drawing with these flashcards. Learn the definitions of construction lines, object lines, hidden lines, and dimension lines. Perfect for students and professionals in design and architecture.
