City Guilds Model Questions Vol1 2025 Engineering Question 37
Practice objective / multiple choice question 37 from the 2025 City Guilds Model Questions Vol1 Engineering examination.
A CNC milling operation uses a cutting speed \(V\) (in m min\(^{-1}\)). Tool life follows Taylor's equation \(V\,T^{0.25}=200\). At a speed of \(100\) m min\(^{-1}\) the machining time for one part is \(0.6\) min, and machining time varies inversely with speed. The tool costs $50 and is replaced after its life; the cost of the tool is allocated proportionally to the machining time. To keep production efficient the machining time per part must not exceed \(0.5\) min. Determine the cutting speed that minimises the cost per part and compute that minimum cost (in dollars, to two decimal places).
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About This Question
This is City Guilds Model Questions Vol1 2025 Engineering Question 37. It is one of the objective questions from the 2025 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
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