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pdfeducation.com, 1301/312, 1304/312, 1305/312, TECHNICAL DRAWING, June/July 2012, Time: 3 hours, THE KENYA NATIONAL EXAMINATIONS COUNCIL, CRAFT CERTIFICATE IN CARPENTRY AND JOINERY, CRAFT CERTIFICATE IN MASONRY, CRAFT CERTIFICATE IN PLUMBING, TECHNICAL DRAWING, 3 hours, INSTRUCTIONS TO CANDIDATES, You should have the following for this examination:, Answer booklet, Drawing instruments, Drawing paper size A,, 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 millimeters., This paper consists of 8 printed pages., Candidates should check the question paper to ascertain that all, the pages are printed as indicated and that no questions are missing., O 2012 The Kenya National Examinations Council, Turn over

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pdfeducation.com, Using a pair of compass and ruler only, construct a triangle ABC with sides AB =, 55mm, AC 40 mm and angle BAC 75°., 1., (a), (5 marks), (b), Figure 1 shows an elevation of the turning handle of a can opener. Draw this view, TWICE FULL SIZE, showing clearly the method of establishing the centres of the ares., R9, 12, 12, 50, Fig.1, (10 marks), Construct a diagonal scale of 25 mm to represent 1 m which can be used to measure, m and 10 mm up to 6 m. Show the dimensions of 4 m, 320 mm and 3m 630 mm on the, scale., (c), (5 marks), (a), Make free hand sketches of the following tools:, (i), Inside callipers;, (ii), Tenon saw;, (iii), Hand file;, (iv), Firmer chisel., (8 marks), 1301, 1304-5/312, R 34, 2.

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(b), Figure 2 shows three views of an object drawn in first angle projection. Draw the object, in isometric making x the lowest point., (12 marks), 20, 20, 100, Fig, 2, 1301, 1304-5/312, 3, Turn over, SL

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pdfeducation.com, Figure 3 shows the front elevation of a truncated hexagonal prism. Using first angle, projection, draw the following:, 3., (a), (i), Plan;, (ii), End elevation in the direction of arrow E.E;, (iii) Development of the prism;, (iv), True shape of the cut portion., (20 marks), E.E., A/C= 60, Fig 3, Figure 4 shows the layout of a crank mechanism in which A travels along a straight line, as the crank OB rotates about point O. Draw the locus of point C for one revolution of, crank OB., 4., (a), 100 mm, OB, 35 mm, AB, 90mm, AC, %3D, 45 mm, Fig. 4, (12 marks), 1301, 1304-5/312, OL

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pdfeducation.com, (b), Construct a triangle equal in area to the rectangle shown in figure 5 and inscribe a circle, on the triangle., 75, Fig. 5, (8 marks), 5., Figure 6 shows a hexagonal prism intersecting a square pyramid. Draw the following in first, angle projection., (i), Line of interpenctration;, (ii), End of elevation in direction E.E.;, (ii), Plan., (20 marks), 30, e E.E., 40, o DIAGONAL= 70, Fig. 6, 1301, 1304-5/312, Turn over, 5T, A/C= 40, 08