A tensile test is performed on a mild steel round bar. Its diameter after fracture will
A. Remain same
B. Increase
C. Decrease
D. Depend upon rate of loading
Answer: Option C
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As tensile test performed on a mild steel (ductile material), the length of material increases and due to increasing the length, diameter of rod decreases.
When the rod material achieves ultimate stress point, fracture starts in material