Metal Works Paper 1, May/June 2012

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:

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

casting cavity.

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