What is missing views in engineering drawing?
3.2.Drawing of missing views An engineering drawing is read mentally. The whole drawing cannot be interpreted easily at one glimpse. It should be read analytically and patiently. In an Orthographic projection, two views are necessary to study about the object or understand the nature of the object.
What are hidden lines used for in engineering?
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. Figures 4-11 and 4-12 show objects that require hidden lines in their orthographic views.
Why sectional views are used in drawing?
A sectional view or a section looks inside an object. Sections are used to clarify the interior construction of a part that cannot be clearly described by hidden lines in exterior views. By taking an imaginary cut through the object and removing a portion, the inside features may be seen more clearly.
How is an orthographic drawing similar to or different from an isometric drawing?
Isometric: a method of representing three-dimensional objects on a flat surface by means of a drawing that shows three planes of the object. Orthographic: a method for representing a three-dimensional object by means of several views from various planes.
Why hidden lines and center lines are used in mechanical engineering?
Hidden lines in a drawing represent the edges where surfaces meet but are not directly visible. Draw centerlines locating the center of a hole only if they are needed to indicate symmetry or for dimensioning.
How do you draw the missing elevation of a building?
If you are talking about drawing the missing elevation drawing, it can be drawn through orthographic lines. Actually the elevations are drawn by extending the perpendicular construction lines from the given object. These lines are joined and various features of the object are located. Some imagination is also required.
What are broken lines in a drawing?
Hidden lines: The hidden corners which will not be visible in a particular view, are shown by broken lines. Leader: The leader is a line with arrow head, drawn at an angle of not less than 30° to the line to which it touches.
How to read an engineering drawing?
An engineering drawing is read mentally. The whole drawing cannot be interpreted easily at one glimpse. It should be read analytically and patiently. In an Orthographic projection, two views are necessary to study about the object or understand the nature of the object.
Is it possible to draw without dimensions?
Draw the given views and also the missing views A drawing without dimensions is of no use to engineers. Though we have the shape of an object in a rough drawing, the exact size of the object has to be clearly illustrated in the drawing.