City Guilds Model Questions Vol1 2018 Engineering Question 47
Practice objective / multiple choice question 47 from the 2018 City Guilds Model Questions Vol1 Engineering examination.
A CNC turning operation uses a carbide insert whose tool‑life relationship is \(VT^{n}=C\) with \(n=0.20\) and \(C=500\). The cutting speed \(V\) (in m·min⁻¹) therefore gives a tool life \(T=500V^{-0.20}\) minutes. The machining time per part is \(t = 120V^{-0.5}\) minutes. Power consumption adds a cost of \$0.02V\) per minute of machining. The machine's depreciation cost is \$150 per hour and a new insert costs \$30. Determine the cutting speed (to the nearest whole m·min⁻¹) that minimises the total cost per part, where total cost per part = machine cost + power cost + tool cost per part.
Answer Options
About This Question
This is City Guilds Model Questions Vol1 2018 Engineering Question 47. 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.