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Quality, Tolerance and Costs

Quick questions on Tolerance and dimensional accuracy - CCEA GCSE Engineering and Manufacturing

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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A part is dimensioned 30±0.1 mm30 \pm 0.1\ \text{mm}. State the upper and lower limits. [2 marks]
What is q2?
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Calculate the total tolerance for 30±0.1 mm30 \pm 0.1\ \text{mm}. [1 mark]
What is q3?
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Why are tolerances used instead of one exact size? [2 marks]

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