Pattern Makers Theory N2 — Document

December 2022 — N2 — Pattern Makers Theory

N2 2022 Nated Engineering

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1.2Operation (5\

1.3Control (5\

Q2— Section header —

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Q4— Section header —

4.10Rusty, dirty, damp or improperly coated chaplets Entrapped air Generation of excessive gas from moulding or core sand coupled with poor venting Overheating of surfaces Use of poor grade blacking too low pouring temperature

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Q6— Section header —

6.1What are some of the causes of warping in timber? (2 1\ (2\

6.2When is metal used for patterns? (2\

6.3Why is metal better than wood? (2\

6.4Why should plenty of oil be used on an oil stone (1\

6.5Explain with a sketch the method used in casting a small hollow cylinder. (2\

6.6For wh ich parts of the pattern must the shrinkage rule be used? (2\

6.7Is the draft always the same on all parts of a pattern? (1\ 11020532 Copyright reserved

6.8What is the usual allowance for the finish on small castings? (1\

6.9When must a greater amount be allowed? (1\

6.10Under what conditions will a seasoned board warp? (1\

6.11What wood is most commonly used in pattern making? (1\

6.12Explain the difference in the manner in which saws cut when ripping and when crosscutting? (2\

6.13In what direction should the grindstone revolve when grinding scraping tools or other tools having a short bevel? (1\

6.14When is dry parting sand used? (1\ [20]20

Q7— Section header —

7.1Should a shrinkage rule be used when making a core box? (1\

7.2Why must the pattern maker know something about echanical rawing? (1\

7.3What portion of the skew chisel does the cutting? (1\

7.4What is meant by shrinkage in pattern making? (1\

7.5When is it necessary to use mahogany, cherry or maple for patterns? (1\

7.6Explain the use of a flask in moulding and give the two principal parts (4\

7.7What allowance must be made on the pattern for shrinkage when the casting is to be made of iron? (1\

7.8Explain the use of core prints (2\

7.9What is meant by finish in pattern making? (2\

7.10When glueing up pattern stock, how is the pressure necessary to bring the glued surfaces in close contact usually obtained? (2\

7.11What are rapping plates? (1\

7.12What are fillets and where are they used on patterns? (2\

7.1320

Mark Allocation

Total100 marks

Sections15 + 10 + 20 + 10 + 5 + 20 + 20 = 100 marks

Paper information

TitleDocument

SubjectPattern Makers Theory

LevelN2

Document typeQuestion paper

Year2022

MonthDecember

Pages5

Downloads4

Examination context

Decade2020s

Years ago4y

SeasonSummer (SH)

Start dayThursday

Exam periodDecember 2022

Days since exam1,410

About Pattern Makers Theory examination preparation

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How to use this resource for revision

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A practical revision approach

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Archived on8 September 2026

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