City Guilds Model Questions Vol1 2020 Engineering Question 24

Practice objective / multiple choice question 24 from the 2020 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2020 Engineering Objective / Multiple Choice Hard Difficulty
Question 24 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2020 • ENGINEERING • objective

A CNC milling operation uses a 6‑tooth end mill (\(z=6\)) with a feed per tooth of \(0.20\ \text{mm}\) at a spindle speed of \(2500\ \text{rpm}\). The width of cut is \(30\ \text{mm}\). The specific cutting force is \(K_c = 3000\ \text{N\,mm}^{-2}\) and the machine's power limit is \(5\ \text{kW}\).\n\n(a) Calculate the maximum allowable depth of cut \(d_{\max}\) (in mm) so that the cutting power does not exceed the limit.\n(b) Using this depth, compute the resulting material removal rate (MRR) in \(\text{mm}^3\text{/min}\). Give answers to two decimal places.

Answer Options

Correct Answer A. a) 2.78 mm, b) 100.00 mm³/min
B. a) 2.78 mm, b) 85.00 mm³/min
C. a) 2.50 mm, b) 90.00 mm³/min
D. a) 3.10 mm, b) 115.00 mm³/min
Correct Answer
A
Correct Option:
a) 2.78 mm, b) 100.00 mm³/min

About This Question

This is City Guilds Model Questions Vol1 2020 Engineering Question 24. It is one of the objective questions from the 2020 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Hard .

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