A cylindrical specimen of steel having an original diameter of 12.8 mm – McqOptions

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1.	A cylindrical specimen of steel having an original diameter of 12.8 mm is tensile tested to fracture and found to have engineering fracture strength σf of 460 MPa. If its cross-sectional diameter at fracture is 10.7 mm, the true stress at fracture will be
A.	660 MPa
B.	645 MPa
C.	630 MPa
D.	615 MPa
Answer» B. 645 MPa

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