Joseph is an engineer at a construction firm. He has been given the task of developing engineering drawings for a few metal pieces used by the firm. These metal pieces have a slanted surface area. Joseph has developed orthographic projections. What should the lines he used to create the auxiliary view appear as in the finished view? A.
object lines
B.
construction lines
C.
reference lines
D.
projection lines

D.

Explanation:

Projection lines are those extended lines used to project the surface of 2D object.

In orthographic projections, it is difficult to draw slanted or inclined surface without getting distorted. So, engineers use auxiliary view to show the exact portrayal of the slanted surface.

The lines drawn to point the projection in auxiliary view is called the projection lines.

Therefore, option D is correct.

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