Technical Drawing - Exam Papers - Ordinary - 1993 - Paper 1

Question 6

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  1. Draw a triangle DEF in which the sides are in the ratio of 2.5 : 3 : 4 and the longest side DE is 86 mm.
    In this triangle DE is the directrix of a parabola and F is the focus. Draw a portion of the parabola.

  2. In the quadrilateral shown in Fig. 6, AD is the directrix of a parabola, B and C are points on the curve and the focus lies within the quadrilateral. Locate the focus and axis and draw a portion of the curve.
    Construct a tangent to the curve from the point D.
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