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 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 is the purpose of hidden lines and centerlines in engineering?
What is the purpose of hidden lines and center lines? The purpose of hidden lines is to show where other faces exist that are not seen. Center lines show the diameter of circles in a sketch.
What do hidden lines in orthographic projections represent?
3. 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.
How do you use 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.
Do you dimension hidden lines?
Dimensioning to hidden lines should be avoided wherever possible. … Dimensions should not be placed on a view unless clarity is promoted and long extension lines are avoided. 9. Longer dimensions should be placed outside all intermediate dimensions so that dimension lines will not cross extension lines.
Which lines on a drawing should be the thickest?
The direction of the cutting line is shown with a line called a cutting plane lineHeavy dashed line that shows a theoretical cut through an object.. This is the thickest line that may appear on a drawing. It is made up of a series of 3/4″ long (19mm) and double lines 1/8″ (3.2mm) long that are about 0.040″ (1mm) thick.
What are the 6 types of lines?
There are many types of lines: thick, thin, horizontal, vertical, zigzag, diagonal, curly, curved, spiral, etc. and are often very expressive. Lines are basic tools for artists”though some artists show their lines more than others.
What object represents a line?
Answer: The following can represent a point: corner of a table; tip of a needle; intersection of the front wall, side wall and ceiling; tip of a ballpen. The following can represent a line: intersection of a side wall and ceiling, laser, electric wire edge of a table.
What does a hidden line 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 type of lines are used for hidden details?
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.
Do isometric views always show hidden lines?
Usually only the visible surfaces of an object are drawn in isometric, with hidden lines left out. Although this is considered the preferred practice, there are always times when hidden lines are needed to clarify very complex isometric drawings.
Do you show hidden lines in a section view?
Section views do not include hidden lines. Any material cut when a section view is defined is hatched using section lines. There are many different styles of hatching, but the general style is evenly spaced 45° lines.
What do dimension lines end with?
The dimension line is a fine, dark, solid line with arrowheads on each end. It indicates direction and extent of a dimension.