City Guilds Model Questions Vol1 2020 Engineering Question 28
Practice objective / multiple choice question 28 from the 2020 City Guilds Model Questions Vol1 Engineering examination.
A metal rod is measured with two instruments.\n\n- A steel rule has a systematic error of +0.20 mm and a uniform random error of ±0.05 mm.\n- A digital caliper has a systematic error of -0.10 mm and a normal random error with standard deviation \(\sigma =0.02\) mm.\n\nThe readings obtained are 500.15 mm (rule) and 500.05 mm (caliper). Using weighted least‑squares, determine the best estimate of the true length of the rod and the combined standard uncertainty. Give the result to two decimal places.
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This is City Guilds Model Questions Vol1 2020 Engineering Question 28. It is one of the objective questions from the 2020 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
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