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Mechanical Engineering Technology

MEC 1011


MEC 1011 - Design Communication I
Assignment 1

Due at the end of our first meeting in Week 2
All items drawn with pencil on
8 1/2 x 11 paper


Product Life Cycle Management Model in Engineering



For Our Purposes:





We Start Simply with Hand Sketches:

       Learning by mimicking and practice, each of the following collection of exercises will make up the

first third of Assignment 1.


EXERCISE 1: Neatly Hand Sketch (a) Each of the Five Regular Solids; (b) the sphere, torus, oblate ellipsoid, Prolate ellipsoid; (c) any other complete family of your choosing.





Extruded Surface


Revolved Surface

EXERSISE 2: Create your own surface of consisting of at least 9 edges and then sketch both the extrusion of the surface and the revolution of the surface about an axis. Illustrate the process graphically as is done above.



Solid Modeling is the generation of geometry by the addition and subtraction of more basic solid objects.

The most fundamental of these basic solid objects are called primitives.


There are five primitives:


1.   Block

2.   Cone

3.   Cylinder

4.   Sphere

5.   Wedge



EXERCISE 3: For each of the four solids shown on the right, graphically communicate their construction from primitives, mimicking the sketch shown on the left. Also indicate each mathematical relationship as shown. Carry out this exercise using hand sketching only and using one piece of paper per object.


  1. Exercise 4


  1. Produce a concept sketch of a one-part paper weight (avoid complexity that would prevent completion of items 3 and 4). Include general and specific notes (Ref. p. 101). Also include a title at the top, some reference to size, material, how it will work and how it will be made (include production volume). Sign and date it.


  1. Use the graph paper utility to produce a rectangular grid for orthographic construction. Draw on the side opposite the printed lines (with a plain sheet underneath the lines will show through and guide you). Produce a complete working drawing (to any convenient scale) of your paper weight. Include views, projection lines (lightly), a ‘fold line’, dimensions, tolerances, title block (with scale), border, and pertinent notes. Ref. Ch 4 and 12.


  1. Use the graph paper utility to produce a pattern of triangles for isometric construction (select polygon patterns/triangles). Produce an isometric view (to any convenient scale) of the paper weight. Ref. p. 87




(The graph paper utility is on your desktop)