ORTHOGRAPHIC PROJECTION

ORTHOGRAPHIC PROJECTION

-A technique used to create multiview drawings -any projection of the features of an object onto an imaginary plane of projection.

top view, front view, right side view

3 principal views in an orthographic projection drawing

Hidden Line

A dashed line type that shows interior detail not visible from the outside of the part.

Orthographic Template

A drawing sheet layout with the Top, Front, Right & Pictorial View areas labeled and defined

Third-Angle Projection

A system of projection in which the object is projected onto the planes from the third angle, or quadrant.

Isometric View

A view of a 3D object from a certain angle

HEIGHT, WIDTH, AND DEPTH

All three-dimensional objects have

WIDTH

Dimension "A" associated with an object's side-to-side dimension

HEIGHT

Dimension "B" associated with an object's top-to-bottom dimension.

DEPTH

Dimension "C" associated with an object's front-to-back dimension or extent of something from side to side.

6

How many principal views can be projected from a 3D object using the Glass Box method?

TOP VIEW

Identify the principal view always placed on top of the front view.

RIGHT SIDE

Identify the principal view.

PROJECTED

In the Glass Box method, the faces and edges of the object are ________________ onto the sides of the box.

FRONT

It is selected as the most natural position or use, it shows best shape and characteristic contours, and longest dimensions

DEPTH AND WIDTH

THE TOP VIEW SHOWS THE _____ OF THE OBJECT.

FALSE

TRUE OR FALSE: ENGINEERING DRAWINGS USING ORTHOGRAPHIC PROJECTION MUST ALWAYS INCLUDE ALL SIX PRINCIPAL VIEWS.

TRUE

TRUE OR FALSE: TO DESCRIBE THEIR TRUE SIZE AND SHAPE, SIMPLE PARTS REQUIRE LESS VIEWS THAN COMPLEX PARTS.

HEIGHT AND DEPTH

Th right side view always shows the _________ and __________ of the object.

WIDTH AND HEIGHT

The front view always shows the _______ and __________ of the object.