1) State five factors that must be considered when choosing a material. Discuss the importance to the engineer of each of these factors.
2) An engineer is planning to design a small boat: he has the choice of aluminium or steel. From the information below make an informed decision, with justifications, on which material should be used
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Aluminium
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Steel
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Weight
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2.65 tonnes/m3
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7.86 tonnes/m3
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Yield strength
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275 MPa
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205 MPa
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UTS
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310 MPa
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345 MPa
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corrosion
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Excellent
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Poor
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You should comment on each of the above material characteristics for each material before making your choice.
3) When designing a product this must be systematic. Briefly discuss what stages need to be considered when designing a product from 'scratch'.
4)
a) List what factors you would need to consider for a systematic approach to the design of a new product.
b) Comment on the properties that a operational and saleable product must have e.g a new car.