City Guilds Model Questions Vol1 2018 Engineering Question 15
Practice objective / multiple choice question 15 from the 2018 City Guilds Model Questions Vol1 Engineering examination.
A metal rod is measured twice: with a steel rule (uncertainty \(\pm0.5\) mm) giving \(250.3\) mm and with a digital caliper (uncertainty \(\pm0.1\) mm) giving \(250.8\) mm. Using inverse‑variance weighting, (a) find the best estimate of the true length and its combined standard uncertainty; (b) if a piece is to be cut to \(150.0\) mm using this best estimate as the reference, compute the percentage error associated with the measurement uncertainty.
Answer Options
About This Question
This is City Guilds Model Questions Vol1 2018 Engineering Question 15. It is one of the objective questions from the 2018 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.