What is the purpose of 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 do the hidden lines of a product drawing show?
Hidden lines are used to show parts of the drawing that are hidden from sight in the view that is drawn. HIdden lines may be used to show details that are cut out of the bottom of an object and lines that may be visible when you look at the object from another view. Are drawn using altering short and long dashes.
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.
Why would building professionals such as machinists and contractors prefer multi view drawings over pictorial drawings?
Why would building professionals , such as machinists and contractors , prefer multiview drawings over pictorial drawings ? So they can look at the front view , sides, and top to know all dimensions of the building without having to estimate.
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.
How do you use hidden lines?
Hidden lines are dashed lines used to represent internal features that are obscured by the object. These hidden lines represent the obscured corner of the notch. potential hidden lines in this sketch fall directly behind visible lines in the right side view.
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 .
Can you dimension hidden lines?
Dimensioning to hidden lines should be avoided wherever possible. Use auxiliary cross sectional views instead. Longer dimensions should be placed outside all intermediate dimensions so that dimension lines will not cross extension lines .
What is the purpose of construction lines object lines quizlet?
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 the 3 pictorial drawings?
There are many types of pictorial drawings and these include isometric , oblique, axonometric and planometrics and the four drawings figures 164 – 167 illustrate the differences between them. Of these, isometric drawings are the most common.
Why is it important to layout a multiview sketch with points and construction lines before you draw object lines?
3. Why is it important to lay out a multiview sketch with points and construction lines before drawing object lines ? So you don’t show wrong dimensions and your object lines line up in the intended ratio to the reference sketch . If drawing a “new” sketch , it is important so you don’t erase your construction lines .
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 is the purpose of hidden and center lines?
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 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 is a projection line?
Projection lines are extensions of lines that assist in 2D drawing. For example, in a drawing, you can use projection lines on an auxiliary view to enable creation of additional views with proper alignment and size.