waecE-LEARNING
Metal Works Paper 2, May/June 2012  
Questions: 1 2 3 4 5 Main
General Comments
Strength
Weakness/Remedies
Question 2

A. Describe how to avoid spinning of the workpiece when drilling.

B. State the function of the following in sand casting:

I. vents;

II. sprue hole;

III. core print.

C. Explain how a hacksaw blade is fixed to cut a long strip of metal.

D. Sketch a straight hand snips.


 

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OBSERVATION

The parts of the question that proved difficult to the candidates were parts (b) (iii) and (c).
The expected responses to these  parts are:

  1. (iii) core print is  an extension  of the core that rests in the mould outside the

casting cavity.

  1. - loosen the wingnut and remove blade;

rotate bolts through 90°; mount blade on the pins and tighten.

 

 

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