City Guilds Model Questions Vol1 2019 Engineering Question 7
Practice objective / multiple choice question 7 from the 2019 City Guilds Model Questions Vol1 Engineering examination.
Material A has tensile strength \(400\) MPa and density \(2.7\) g·cm\(^{-3}\). Material B has tensile strength \(150\) MPa and density \(7.8\) g·cm\(^{-3}\). A component is to be made from a mixture of the two materials, assuming linear mixing for both strength and density. The component must have a tensile strength of at least \(250\) MPa and a density not exceeding \(4.0\) g·cm\(^{-3}\). What is the minimum fraction (by weight) of Material A required? Express your answer as a decimal rounded to two places.
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About This Question
This is City Guilds Model Questions Vol1 2019 Engineering Question 7. It is one of the objective questions from the 2019 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Medium .
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