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Technical Drawing Paper 1,Nov/Dec. 2009  
Questions: 1 2 3 4 Main
General Comments
Strength
Weakness/Remedies









Question 4

The figure below shows a slider crank mechanism. Link JP is driven by a crank OJ, and it is constrained to pass through a pivot at K

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OBSERVATION

Candidates were required to draw the schematic diagram of the given link mechanism. The circle of the schematic diagram would then be divided into twelve equal parts, and length JP Would be cut off from each point of the link as shown in the solution below:

A good percentage of the candidates failed to draw the required schematic diagram:
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