City Guilds Model Questions Vol1 2020 Engineering Question 23
Practice objective / multiple choice question 23 from the 2020 City Guilds Model Questions Vol1 Engineering examination.
Two independent measurements of a length are obtained. Using a steel rule the length is measured as \(125.4\ \text{mm}\) with an uncertainty of \(\pm0.5\ \text{mm}\). Using a digital caliper the length is measured as \(125.6\ \text{mm}\) with an uncertainty of \(\pm0.1\ \text{mm}\). Determine the best estimate of the length by inverse‑variance weighting and give the combined standard uncertainty, both to two decimal places.
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About This Question
This is City Guilds Model Questions Vol1 2020 Engineering Question 23. It is one of the objective questions from the 2020 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
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