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pdfeducation.com, 1301/312, 1304/312, 1305/312, TECHNICAL DRAWING, June/July 2009, Time: 3 hours, THE KENYA NATIONAL EXAMINATIONS COUNCIL, CARPENTRY AND JOINERY CRAFT CERTIFICATE, MASONRY CRAFT CERTIFICATE, PLUMBING CRAFT CERTIFICATE, TECHNICAL DRAWING, 3 hours, INSTRUCTIONS TO CANDIDATES, You should have the following for this examination:, Drawing paper size A2, Drawing instruments, Metric scale rule., Answer any FIVE of the following EIGHT questions., All questions carry equal marks,, Maximum marks for each part of a question are as shown., All dimensions are in millimetres., This, paper consists of 9 printed pages., Candidates should check the question paper to ascertain that all, the pages are printed as indicated and no questions are missing., O 2009 The Kenya National Examinations Council, Turn over

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pdfeducation.com, 1., (a), State clearly the proper use of the following instruments:, (i), Tee square, (ii), Set square., (2 marks), (b), Construct a diagonal reduction scale of 1:100 to read upto 14 metres to an, accuracy of 0.05 metres. Indicate the following readings on the scale:, (i), 8.25 m, (ii), 6.55 m, (10 marks), Using the concentric circles method, construct an ellipse with major axis, of 80 mm and a minor axis of 60 mm., (c), (8 marks), Figure I shows a reciprocating water pump system. Draw the locus of, point "C" when the crank BO makes one revolution given that B is pin, jointed to AC and A is allowed to move horizontally., (a), (10 marks), OB = 25mm, AB = 55 mm, BC = 30 mm, %3D, 60%, FIG.1, 1301 -05/312

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pdfeducation.com, Figure 2 shows the front elevation and plan of a truncated right cone., Copy the given views and draw full size the following:, (b), (i), truncated plan;, (ii), the left end elevation;, (iii), true shape of the truncated face., (10 marks), 55, 45°, FIG 2, 1301 -05/312, 3, Turn over

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pdfeducation.com, 3., Figure 3 shows an isometric view of a shaped block. Draw full size the following, views in first angle projection:, (i), sectional elevation "A-A";, (ii), plan;, (iii), left end elevation., (20 marks), 940, 25, thro hole, 15mm thick, web, un, 2., 25, 15, 20, 47020, 50, 40, FIG. 3, 1301 -05/312, 25, 252, SL

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pdfeducation.com, Figure 4 shows a security light reflector consisting of elliptical and parabolic, curves, Construct the reflector using a scale of 1:1., (20 marks), 85, E 30, 65, FIG. 4, 1301 -05/312, 5n, Turn over, O0L