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Questions and Answers
What are visible object lines?
What are visible object lines?
What are hidden lines used for?
What are hidden lines used for?
What are center lines?
What are center lines?
Thin lines made up of alternating long and short dashes used to indicate the center of symmetrical features.
What do section lines represent?
What do section lines represent?
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What are dimension, extension, and leader lines used for?
What are dimension, extension, and leader lines used for?
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What do cutting plane/viewing plane lines indicate?
What do cutting plane/viewing plane lines indicate?
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What are break lines used for?
What are break lines used for?
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What do phantom lines indicate?
What do phantom lines indicate?
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What is the alphabet of lines?
What is the alphabet of lines?
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Study Notes
Lines in Technical Drawings
- Visible Object Lines: Thick, dark, solid lines that represent the edges and details of objects in drawings.
- Hidden Lines: Thin, dashed lines that signify surfaces or contours of objects that are not visible or are obscured.
Center, Section, and Dimension Lines
- Center Lines: Consist of alternating long and short dashes, indicating the center of symmetrical features like circles and arcs; essential for dimensioning.
- Section Lines: Thin "cross hatching" lines used in sectional views, highlighting different materials or parts of an object in manufacturing.
Dimensioning Lines
- Dimension, Extension, and Leader Lines: Thin lines important for dimensioning, typically ending with arrowheads and accompanied by numerical indications for size or location.
Viewing and Break Lines
- Cutting Plane/Viewing Plane Lines: Very thick lines that indicate where an imaginary cutting plane intersects an object; arrowheads direct towards the view surface.
- Break Lines: Utilized to truncate a view or remove repetitive details; can be represented as thick wavy lines for short breaks, and thin straight zigzags for longer breaks.
Phantom Lines and Graphic Alphabet
- Phantom Lines: Thin lines that illustrate alternate positions of moving parts, depict lines of motion, and represent adjacent or repetitive details.
- Alphabet of Lines: Refers to the various lines and symbols used in technical drawings, forming a visual language for representation.
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Description
This quiz covers the essential vocabulary of lines used in technical drawing. Learn the definitions and applications of visible object lines, hidden lines, and center lines to enhance your understanding of drafting techniques. Perfect for students and professionals alike.
