# Question: What Is The Purpose Of Hidden Lines And Centerlines?

## What is the purpose of hidden lines in construction drawings?

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..

## Why would building professionals such as machinists?

Why would building professionals, such as machinists and contractors, prefer multiview drawings over pictorial drawings? It would allow them to see all aspects of the object and better judge how to make them.

## Do isometric drawings have hidden lines?

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. … In general, use centerlines sparingly in isometric drawings.

## 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.

## What do construction lines do?

Construction lines (also known as xlines) are temporary linework entities that can be used as references when creating and positioning other objects or linework. For example, you can use construction lines to prepare multiple views of the same item, or create temporary intersections to serve as object snaps.

## How do I find hidden lines in an object?

A drafter—in deciding whether a line in a view should be represented as hidden or as visible—relies on the fact that in third-angle projection the near side of the object is near the adjacent view, but in first-angle projection the near side of the object is remote from the adjacent view.

## What are the three regular views?

Although six different sides can be drawn, usually three views of a drawing give enough information to make a three-dimensional object. These views are known as front view, top view and end view. Other names for these views include plan, elevation and section.

## What are the 6 principal views of an object?

In orthographic projection there are six possible views of an object, because all objects have six sides – front, top, bottom, rear, right side, and left side.

## Why is it important for engineers to know how do you sketch and interpret Multiviews?

Knowing how to sketch and interpret multiviews is an important skill for any engineer. In this activity, you will develop your ability to see and sketch objects as a series of related two-dimensional views.

## What are alphabet lines?

The Alphabet of Lines is a list of line symbols that engineers use in technical drawings to communicate specific shapes, sizes or surfaces. In the Alphabet of Lines, thick, dark lines represent the outline of an object, showing its visible surfaces and edges.

## What is the purpose of centerlines?

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 type of pictorial is shown in the first representation in Step 2 How can you tell?

The type of pictorial shown in the first representation in item 2 is oblique because the image is straight on.

## 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.

## 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.