Which description represents the meaning of the alphabet of lines?
The Alphabet of Lines is a list of line symbols that engineers use in technical drawings to communicate specific shapes, sizes or surfaces. The lines and symbols used in the Alphabet of Lines are universal, which means engineers around the world use and understand them.
Which in the alphabet of lines is considered the finest?
9. Alphabet of Lines • Center line It is the lightest line or finest line in a drawing.
What are the different types of lines in technical drawing?
Using the Alphabet of Lines
- Construction Line. This line is used mainly in sketching, which is a freehand drawing technique.
- Visible Object line. This line is used to draw all the edges of the object.
- Hidden Object Line.
- Centre Line (or centreline)
- Extension Line.
- Dimension Line.
What kind of lines that are very light and very thin used to construct layout work?
CONSTRUCTION LINE – Very light and thin line use to construct layout work.
What do hidden lines look like?
A hidden line, also known as a hidden object line is a medium weight line, made of short dashes about 1/8” long with 1/16”gaps, to show edges, surfaces and corners which cannot be seen. Sometimes they are used to make a drawing easier to understand. Often they are omitted in an isometric view.
What is the purpose of hidden lines and center lines?
Hidden lines show edges of details that are not visible from the point of view shown in the drawing. Center lines define the center of arcs, circles, or symmetrical parts.
What is the purpose of object lines?
Object lines? The purpose of construction lines is to give you an outline of what you are about to draw. Object lines are used for outlining the shape and giving it its main features.
What are short break lines?
Short break lines are thick, wavy solid lines that are drawn freehand. When either of these break lines is used to shorten an object, you can assume that the section removed from the part is identical to the portions shown on either side of the break.
What is a Dimension line?
The dimension line is a thin line, broken in the middle to allow the placement of the dimension value, with arrowheads at each end (see diagram below). An arrowhead is approximately 3 mm long and 1mm wide. An extension line extends a line on the object to the dimension line.
What is called straight line?
A line is sometimes called a straight line or, more archaically, a right line (Casey 1893), to emphasize that it has no “wiggles” anywhere along its length. Two lines lying in the same plane that do not intersect one another are said to be parallel lines.
How do you describe a straight line?
By definition, a straight line is the set of all points between and extending beyond two points. The two properties of straight lines in Euclidean geometry are that they have only one dimension, length, and they extend in two directions forever.
What is the difference between line and straight line?
Straight and curved lines A line can be straight or curved. In geometry, the word line means a straight line. A straight line is the shortest distance between two points. A straight line is the line traced by a point moving in a direction that does not change.
What are the types of straight lines?
Four basic kinds of straight lines: 1. Vertical. 2. Horizontal.
What are the two categories of line?
There are two basic lines in Geometry: straight and curved.
What is difference between line and Ray?
Student: So, what is the difference between a line and a ray? Mentor: A line goes on to infinity in both directions, but a ray stops on one end. If you cut a line in half, you make two rays. A line segment is part of a line that has two endpoints.
Is a ray a line?
In geometry, a ray can be defined as a part of a line that has a fixed starting point but no end point. It can extend infinitely in one direction.
How do you represent a line?
Line segments are represented by a single overbar with no arrowheads over the letters representing the two endpoints. Consequently, the line segment above may be represented by either: The notations above are read as “Line Segment GH” and “Line Segment HG” respectively.
What figure is a line?
A line is a one-dimensional figure that is made up of an infinite number of individual points placed side by side. In geometry all lines are assumed to be straight; if they bend they are called a curve. A line continues infinitely in two directions.