City Guilds Model Questions Vol1 2021 Engineering Question 47
Practice objective / multiple choice question 47 from the 2021 City Guilds Model Questions Vol1 Engineering examination.
A component must have a total material removal volume of 45 000 mm³. Three machining operations are available:\n- Turning: material removal rate (MRR) = 1500 mm³/min, setup time = 12 min.\n- Drilling: MRR = 300 mm³/min, setup time = 5 min.\n- Milling: MRR = 800 mm³/min, setup time = 8 min.\nBecause of surface‑finish requirements, at least 20 % of the total volume must be removed by each operation. The machine can perform only one operation at a time. Determine the sequence and allocation of volumes that minimise the total production time and give that minimum time (in minutes).
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About This Question
This is City Guilds Model Questions Vol1 2021 Engineering Question 47. It is one of the objective questions from the 2021 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
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