City Guilds Model Questions Vol1 2021 Engineering Question 44
Practice objective / multiple choice question 44 from the 2021 City Guilds Model Questions Vol1 Engineering examination.
A cylindrical steel workpiece of length \(150\ \text{mm}\) and diameter \(50\ \text{mm}\) is to be turned on a CNC lathe. The required cutting (surface) speed is \(120\ \text{m/min}\). The tool feed is \(0.2\ \text{mm/rev}\). The spindle can rotate up to \(2000\ \text{rpm}\). (a) Find the maximum spindle speed (in rpm) that does not exceed the cutting speed. (b) If the diameter is to be reduced from \(50\ \text{mm}\) to \(48\ \text{mm}\) in a single pass, calculate the machining time in minutes, rounded to two decimal places.
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About This Question
This is City Guilds Model Questions Vol1 2021 Engineering Question 44. It is one of the objective questions from the 2021 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
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