Quick Answer: How Are Hidden Lines Drawn?

Which type of lines are used to represent hidden edges?

Figure 5: Use of dashed lines to represent edges hidden in views of a complicated object..

What type of lines are used for hidden details?

Hidden line Hidden details are shown by a series of dashes making up a broken line. It is normal practice that you place a dash at the beginning of the hidden line and another at the end where it meets an intersecting line.

What are the lines drawn called?

Straight lines may be drawn in different directions and are given three names. (i) Horizontal lines: The lines drawn horizontally are called horizontal lines. (ii) Vertical lines: The lines drawn vertically are called vertical lines.

What are extension lines?

Line Conventions, Continued Extension lines Extension lines are thin lines that extend from the object outline or point on the object to a place outside the image area. Extension lines define areas for dimensions.

What happens if a line is viewed perpendicular to the plane of projection?

If the observer views the surface such that the lines of sight are perpendicular to the plane, he or she will see the plane in its true size and shape. This will hold true if the plane surface is projected onto a projection plane parallel to it.

What are hidden lines in drawing?

Hidden lines in a drawing represent the edges where surfaces meet but are not directly visible. Hidden lines are omitted from pictorial drawings unless they are needed to make the drawing clear.

Where do you put hidden lines?

Hidden lines are used to show surfaces that are not directly visible. All surfaces must be shown in all views. If an edge or surface is blocked from view by another feature, it is drawn using a hidden line.

What is the meaning of hidden line?

[′hid·ən ′līn] (graphic arts) For a three-dimensional object, a line that cannot be seen because view of it is obstructed by part of the object or of another object.

What does a centerline look like?

Centerlines indicate a circular feature on a drawing. In 2D, most circular features look exactly the same as features with non-circular geometry. The only way to tell them apart is by adding a centerline, which represents their central axis and confirms their geometry.

What are the lines on a blueprint called?

Phantom lines (see Figure 1-6) are thin lines used to indicate alternate positions of the parts of an object, repeated detail or the locations of absent parts. They are made by alternating one long and two evenly- spaced, short dashes, with a long dash at each end.

What four lines are used to aid in dimensioning?

There are four methods: parallel, running, chain, and combined dimensioning. Some methods of dimensioning a drawing can create an accumulating error.

When hidden lines meet their lines should?

Rule 2: Hidden lines should always begin and end with a dash. An exception is when the hidden line begins or ends at a parallel visible or hidden line.

Which lines on a drawing should be the thickest?

Here, the typical rule is the closer the object, the darker the line; the further away, the lighter the line. This is because read thicker, heavier lines as being closest to us, whereas lighter lines recede into the background.

Which types of lines are used in orthographic views?

There are four commonly used line types;continuous.hidden.center.phantom.

What are the 7 types of lines?

There are many types of lines: thick, thin, horizontal, vertical, zigzag, diagonal, curly, curved, spiral, etc. and are often very expressive.

What do hidden lines in orthographic projection?

What do hidden lines in orthographic projections denote? Explanation: Hidden lines denote those parts which cannot be seen when viewing the object. They are used when there are holes or slots in the object if they cannot be viewed directly. Change of plane is indicated by outlines.

What are pictorial drawings?

Pictorial Sketches • A Pictorial drawing is a view of an object as it would be seen by an observer who looks at the object either in a chosen direction or from a selected point of view. • Pictorial drawings often are more readily made and more clearly understood than are front, top, and side views of an object.

How is a hidden edge of an object drawn?

Hidden edge lines are drawn with short dashes and are used to show hidden features of an object. A hidden line should begin with a dash in contact with the line from which it starts, except when it is the continuation of an unbroken line.