Technical Drawing - Exam Papers - Ordinary - 2007 - Engineering

Question 5

Full Scale PDF of Answer(Section A)   Full Scale PDF of Answer(Section B)   Solidworks Solid Model of Object(Part A)   Solidworks Solid Model of Object(Part B)   Solidworks Solid Model of Object(Part C)

Answer SECTION A or SECTION B but not both.


(a) Fig.5(a) shows the elevation and end elevation of a machine casting. Draw an isometric view of the casting with the portion in front of the section plane A-A removed.
Point P is to be the lowest point on the drawing.

(b) Using large freehand sketches illustrate the following:
(i) Splined shaft;
(ii) Keyway;
(iii) Stud.



(a) List six CAD commands necessary to produce the drawing in Fig.5(b).

(b) By means of sketches and a short note, explain the purpose of the following commands:
(i) Mirror;
(ii) Break;
(iii) Extend.

(c) Using a large freehand sketch, draw the object shown in Fig. 5(c) as a wireframe representation.

(d) Draw, full size, the object that would be displayed on a CAD system when the following commands are executed:
(All points (X,Y) are specified using absolute co-ordinates. The origin (0,0) is located at the lower left corner of the display)

  • A rectangle is drawn with its lower left corner at (30,30) and its upper right corner at (190,65)
  • The upper corners of the rectangle are chamfered 15 x 15
  • A line joins the lower ends of the chamfer lines
  • A line AB is drawn using the following co-ordinates: A (75,65) B (75,115)
  • The line AB is offset 70mm to the right. This new line is indexed CD (point C is on top)
  • A circular arc is drawn to pass through points B, C and point E (110,215)
  • A 30mm diameter circle is drawn concentric with the arc
  • A 16mm diameter circle is drawn with its centre at point (110,195)
  • The circle is the subject of a circular (polar) array consisting of a total of 5 items. The centre of the array is located at the centre of the three point arc
  • A rectangle is drawn with its lower left corner at (85,78) and its upper right corner at (135,102)
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