CSEC Technical Drawing Paper 2 May/June 2006 - Free CXC Past Paper with Answers

Figure 1 shows the trademark of a car manufacturing company. The trademark shows four equal circles inscribed in the larger circle. Show the construction procedure for obtaining such a design.

Using the focus method, draw the curve of a hyperbola with the eccentricity of 5:3. The distance from its vertex to its focal point is 25 mm and from vertex to directrix is 15 mm.

Figure 2 shows the line ABC at an angle of $45^\circ$ to the horizontal at B and a circle, centre O, touching the line ABC at point P.

(a) Copy, FULL SIZE, the given view. (b) Plot the locus of point P when the circle, centre O, makes one complete revolution along the line ABC.

Figure 3 shows a plan and elevation of a right square pyramid cut by a plane DD at $60^\circ$ to the horizontal.

Draw, FULL SIZE, the following views: (a) The given plan (b) The given elevation (c) The development with S–S as the seam

Figure 4 shows two orthographic views of a machined block and a reference line XY at $45^\circ$ to the horizontal.

Using a scale of 1 : 1, draw the following: (a) The given views (b) An auxiliary elevation on the reference line XY

Using the cabinet or cavalier method, draw an oblique projection of the block. STATE the method used. Omit ALL hidden detail lines.

A right-hand helical spring is made from a steel bar having a circular cross-section with diameter 10 mm. The outside diameter of the spring is 70 mm. The pitch of the coils is 50 mm.

Draw TWO convolutions of the spring. Show ALL relevant constructions employed. Hidden details are NOT required.