1918 



DRAWING— MECHANICAL 



Saturday, June 22 



9 a.m. Two hours 



The more important problems have been placed near the beginning of the paper, but 

 if the two-hour period allowed for the examination is apportioned properly between the 

 six problems, there should be no necessity for omitting any. 



1. Make a working drawing of the book-rack shown below. Include: 



(a) Three views, drawn to a scale of one-eighth actual size. 



(b) The necessary dimensions. 



(c) Enough brief notes to describe fully the materials, fastenings, and 



finish. 



(d) A title, such as " Design for a Wooden Book-rack." 



Description: The upright ends are 1 inch thick, 10 inches wide, and 8 inches 

 high, with upper corners beveled 2 inches in each direction; the hole, 2^ 

 inches in diameter, is centered with its upper edge 1 inch below the upper 

 edge of the end piece. The distance in the clear between the inner 

 surfaces of the two upright ends is 23 inches. The rest of the material 

 is 1 inch square; the two long side pieces are each 28 inches long, and 

 the two short cross pieces are each 14 inches long. The ends fold down 

 flat. 



Make an isometric drawing of a right prism; its axis is vertical and 2 inches 

 long; its upper and lower bases are equilateral triangles whose sides are 

 3 inches long. A cyHndrical hole 1^ inches in diameter extends through 

 the prism from top to bottom; the axis of the hole coincides with 

 the axis of the prism. (The isometric drawing of the circle may be 

 sketched freehand after four or more of its points have been determined 

 accurately.) 



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