Technical Drawing Lines Flashcards

Questions and Answers

What are visible object lines?

Thick dark solid lines indicating edges and details (correct)

Thin dashed lines used for hidden surfaces

Thin lines used for dimensioning

Lines indicating alternate positions of moving parts

What are hidden lines used for?

Show the center of symmetrical features

Indicate edges and details of an object

Symbolize different materials in sectional views

Indicate surfaces or contours that cannot be seen (correct)

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?

Thin cross-hatching lines used to symbolize different materials in sectional views. Signup and view all the answers

What are dimension, extension, and leader lines used for?

Dimensioning purposes Signup and view all the answers

What do cutting plane/viewing plane lines indicate?

Where an imaginary cutting plane passes through an object. Signup and view all the answers

What are break lines used for?

To shorten a view or eliminate repetitive details Signup and view all the answers

What do phantom lines indicate?

Alternate positions of moving parts, lines of motion, and adjacent parts. Signup and view all the answers

What is the alphabet of lines?

The different lines and line symbols used on drawings. Signup and view all the answers

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.

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.