Steel wire rope of 25mm diameter weighing 37N/m has 6 strands of 7 wires each. The diameter and tensile strength of each wire are 2.5mm and 1800 MPa, respectively. The factor of safety for raising a cage of weight 60 kN from a depth of 200m is
A. 5.60
B. 4.50
C. 4.25
D. 4.15
Answer: Option A
This Question Belongs to Mining Engineering >> Mining Machinery
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