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9 marksStandard Engineering Curves

CAPE Building and Mechanical Engineering Drawing Unit 1 · 2016 · Paper 2 · Question 1(d)(i)

Figure 2 shows a rectangular loudspeaker grill of dimensions 140 mm by 100 mm with an elliptical cutout of dimensions 110 mm by 68 mm.

Draw the grill, full size, clearly showing the construction of the ellipse.

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Other parts of this question

  1. 1(a)Plot the locus of the point P.[5 marks]
  2. 1(b)State the name of the locus.[1 mark]
  3. 1(c)(i)Sketch freehand an ellipse with minor and major axes of 50 mm and 100 mm respectively, and label the chord.[1.5 marks]
  4. 1(c)(ii)On the sketch of the ellipse, label the ordinate.[1.5 marks]
  5. 1(d)(ii)Find the foci of the ellipse drawn in (i).[2 marks]

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