City Guilds Model Questions Vol1 2019 Engineering Question 17
Practice objective / multiple choice question 17 from the 2019 City Guilds Model Questions Vol1 Engineering examination.
A metal rod is measured with a steel rule that has a reading uncertainty of \(\pm0.5\text{ mm}\). The measured length at \(30^{\circ}\text{C}\) is \(250.0\text{ mm}\). The coefficient of linear expansion of the metal is \(12\times10^{-6}\ \text{°C}^{-1}\). Determine the length of the rod at \(20^{\circ}\text{C}\) and the combined uncertainty, taking into account the temperature uncertainty of \(\pm0.5^{\circ}\text{C}\). Give the corrected length to three decimal places and the uncertainty to one decimal place (in mm).
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About This Question
This is City Guilds Model Questions Vol1 2019 Engineering Question 17. It is one of the objective questions from the 2019 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
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