Orthographic Projection Questions

• An advantage of this type of view is that each view shows the object all the way through as if it were transparent:
• If a plane is parallel to the plane of projection, it appears:
• The top, front, and bottom views align in this manner:
• This line pattern is composed of three dashes, one long dash on each end with a short dash in the middle:
• This type of surface is tipped to all principal planes of projection and does not appear true size in any standard view:
• This is the plane upon which the top view is projected:
• In orthographic views, dashed lines represent features that would be hidden behind other surfaces.
• The profile plane is the plane upon which the side view is projected.
• A plane surface that is parallel to a plane of projection appears on edge as a straight line.
• Usually screws, bolts, shafts, tubes, and other elongated parts are drawn in a vertical position in the front view.
• If an edge is perpendicular to a plane of projection, it appears as a point.
• The depth dimensions in the top and side views do not necessarily correspond.
• If an angle is in an inclined plane, it may be projected either larger or smaller than the true angle depending on its position.
• A plane surface always projects either on edge or as a surface in any view.
• Any principal view shows three of the four principal dimensions.
• First-angle projection is primarily used in Europe and Asia.
• The rear, left-side, front, and right-side views align horizontally.
• A total of three principal views are arranged in a standard way.
• Drawings are two-dimensional representations of objects that allow you to record sizes and shapes precisely.
• Height is shown in the left-side, top, right-side, and bottom views.